./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI --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 7c883b81b24ce5a721aa9a1ff13aef8a0d532ba87d9e130e470a0b88a1f8e93e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 01:40:06,007 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:40:06,010 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:40:06,061 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:40:06,062 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:40:06,067 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:40:06,069 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:40:06,073 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:40:06,076 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:40:06,085 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:40:06,086 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:40:06,087 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:40:06,088 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:40:06,091 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:40:06,092 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:40:06,095 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:40:06,096 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:40:06,097 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:40:06,099 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:40:06,106 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:40:06,109 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:40:06,111 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:40:06,115 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:40:06,116 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:40:06,125 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:40:06,127 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:40:06,127 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:40:06,128 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:40:06,130 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:40:06,131 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:40:06,132 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:40:06,134 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:40:06,136 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:40:06,138 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:40:06,139 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:40:06,140 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:40:06,140 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:40:06,141 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:40:06,141 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:40:06,142 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:40:06,143 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:40:06,144 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-03 01:40:06,187 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:40:06,188 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:40:06,189 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:40:06,189 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:40:06,190 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:40:06,191 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:40:06,191 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:40:06,191 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:40:06,192 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:40:06,192 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:40:06,193 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:40:06,194 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:40:06,194 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:40:06,194 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:40:06,195 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:40:06,195 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:40:06,195 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:40:06,196 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:40:06,196 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-03 01:40:06,197 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-03 01:40:06,197 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:40:06,197 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:40:06,198 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-03 01:40:06,198 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:40:06,198 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:40:06,199 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:40:06,199 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-03 01:40:06,199 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-03 01:40:06,200 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-03 01:40:06,200 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:40:06,200 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 01:40:06,201 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:40:06,201 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:40:06,201 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:40:06,202 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:40:06,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:40:06,202 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:40:06,203 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:40:06,203 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:40:06,203 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:40:06,203 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:40:06,204 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:40:06,204 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_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c883b81b24ce5a721aa9a1ff13aef8a0d532ba87d9e130e470a0b88a1f8e93e [2022-11-03 01:40:06,569 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:40:06,592 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:40:06,595 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:40:06,597 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:40:06,597 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:40:06,599 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2022-11-03 01:40:06,663 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/data/1eef3b8b3/47001602900545389d0c064b602c8dfa/FLAG41499db90 [2022-11-03 01:40:07,306 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:40:07,307 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2022-11-03 01:40:07,323 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/data/1eef3b8b3/47001602900545389d0c064b602c8dfa/FLAG41499db90 [2022-11-03 01:40:07,563 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/data/1eef3b8b3/47001602900545389d0c064b602c8dfa [2022-11-03 01:40:07,569 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:40:07,571 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:40:07,575 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:40:07,575 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:40:07,580 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:40:07,581 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:40:07" (1/1) ... [2022-11-03 01:40:07,584 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ef096d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:07, skipping insertion in model container [2022-11-03 01:40:07,584 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:40:07" (1/1) ... [2022-11-03 01:40:07,593 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:40:07,665 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:40:08,119 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:40:08,136 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:40:08,209 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:40:08,249 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:40:08,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:08 WrapperNode [2022-11-03 01:40:08,250 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:40:08,251 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:40:08,251 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:40:08,251 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:40:08,259 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:08" (1/1) ... [2022-11-03 01:40:08,287 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:08" (1/1) ... [2022-11-03 01:40:08,315 INFO L138 Inliner]: procedures = 168, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 95 [2022-11-03 01:40:08,315 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:40:08,316 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:40:08,316 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:40:08,316 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:40:08,326 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:08" (1/1) ... [2022-11-03 01:40:08,327 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:08" (1/1) ... [2022-11-03 01:40:08,343 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:08" (1/1) ... [2022-11-03 01:40:08,343 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:08" (1/1) ... [2022-11-03 01:40:08,350 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:08" (1/1) ... [2022-11-03 01:40:08,354 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:08" (1/1) ... [2022-11-03 01:40:08,355 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:08" (1/1) ... [2022-11-03 01:40:08,356 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:08" (1/1) ... [2022-11-03 01:40:08,359 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:40:08,360 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:40:08,360 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:40:08,360 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:40:08,365 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:08" (1/1) ... [2022-11-03 01:40:08,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:40:08,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:40:08,404 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:40:08,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:40:08,444 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 01:40:08,444 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2022-11-03 01:40:08,444 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2022-11-03 01:40:08,444 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 01:40:08,445 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:40:08,445 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 01:40:08,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 01:40:08,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 01:40:08,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:40:08,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:40:08,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:40:08,560 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:40:08,562 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:40:08,902 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:40:08,933 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:40:08,934 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 01:40:08,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:40:08 BoogieIcfgContainer [2022-11-03 01:40:08,937 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:40:08,939 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:40:08,939 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:40:08,943 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:40:08,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:40:07" (1/3) ... [2022-11-03 01:40:08,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ed0f950 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:40:08, skipping insertion in model container [2022-11-03 01:40:08,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:08" (2/3) ... [2022-11-03 01:40:08,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ed0f950 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:40:08, skipping insertion in model container [2022-11-03 01:40:08,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:40:08" (3/3) ... [2022-11-03 01:40:08,953 INFO L112 eAbstractionObserver]: Analyzing ICFG bftpd_2.i [2022-11-03 01:40:08,977 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:40:08,977 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2022-11-03 01:40:09,046 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:40:09,053 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;@4ae55d9a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:40:09,054 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-11-03 01:40:09,059 INFO L276 IsEmpty]: Start isEmpty. Operand has 58 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 53 states have internal predecessors, (60), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 01:40:09,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 01:40:09,066 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:09,067 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 01:40:09,068 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:40:09,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:09,074 INFO L85 PathProgramCache]: Analyzing trace with hash 130425256, now seen corresponding path program 1 times [2022-11-03 01:40:09,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:09,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17187419] [2022-11-03 01:40:09,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:09,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:09,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:09,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:40:09,658 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:09,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17187419] [2022-11-03 01:40:09,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17187419] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:40:09,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:40:09,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:40:09,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938782733] [2022-11-03 01:40:09,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:40:09,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:40:09,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:40:09,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:40:09,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:40:09,714 INFO L87 Difference]: Start difference. First operand has 58 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 53 states have internal predecessors, (60), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 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) [2022-11-03 01:40:09,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:09,965 INFO L93 Difference]: Finished difference Result 118 states and 139 transitions. [2022-11-03 01:40:09,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:40:09,969 INFO L78 Accepts]: Start accepts. Automaton has has 4 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 [2022-11-03 01:40:09,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:09,980 INFO L225 Difference]: With dead ends: 118 [2022-11-03 01:40:09,980 INFO L226 Difference]: Without dead ends: 115 [2022-11-03 01:40:09,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:40:09,986 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 101 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:09,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 112 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:40:10,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-03 01:40:10,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 89. [2022-11-03 01:40:10,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 62 states have (on average 1.6451612903225807) internal successors, (102), 79 states have internal predecessors, (102), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-03 01:40:10,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 120 transitions. [2022-11-03 01:40:10,035 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 120 transitions. Word has length 5 [2022-11-03 01:40:10,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:10,036 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 120 transitions. [2022-11-03 01:40:10,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 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) [2022-11-03 01:40:10,037 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 120 transitions. [2022-11-03 01:40:10,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 01:40:10,037 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:10,037 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 01:40:10,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:40:10,038 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:40:10,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:10,039 INFO L85 PathProgramCache]: Analyzing trace with hash 130425257, now seen corresponding path program 1 times [2022-11-03 01:40:10,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:10,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144277882] [2022-11-03 01:40:10,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:10,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:10,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:10,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:40:10,258 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:10,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144277882] [2022-11-03 01:40:10,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144277882] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:40:10,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:40:10,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:40:10,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17246006] [2022-11-03 01:40:10,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:40:10,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:40:10,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:40:10,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:40:10,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:40:10,265 INFO L87 Difference]: Start difference. First operand 89 states and 120 transitions. Second operand has 5 states, 3 states have (on average 1.3333333333333333) 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) [2022-11-03 01:40:10,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:10,448 INFO L93 Difference]: Finished difference Result 214 states and 301 transitions. [2022-11-03 01:40:10,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:40:10,449 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 1.3333333333333333) 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 [2022-11-03 01:40:10,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:10,452 INFO L225 Difference]: With dead ends: 214 [2022-11-03 01:40:10,452 INFO L226 Difference]: Without dead ends: 214 [2022-11-03 01:40:10,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:40:10,454 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 116 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:10,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 197 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:40:10,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-11-03 01:40:10,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 163. [2022-11-03 01:40:10,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 128 states have (on average 1.6484375) internal successors, (211), 145 states have internal predecessors, (211), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-11-03 01:40:10,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 256 transitions. [2022-11-03 01:40:10,479 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 256 transitions. Word has length 5 [2022-11-03 01:40:10,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:10,479 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 256 transitions. [2022-11-03 01:40:10,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 1.3333333333333333) 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) [2022-11-03 01:40:10,480 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 256 transitions. [2022-11-03 01:40:10,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-03 01:40:10,480 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:10,480 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-03 01:40:10,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 01:40:10,481 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:40:10,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:10,482 INFO L85 PathProgramCache]: Analyzing trace with hash -251784379, now seen corresponding path program 1 times [2022-11-03 01:40:10,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:10,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580706246] [2022-11-03 01:40:10,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:10,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:10,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:10,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:40:10,907 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:10,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580706246] [2022-11-03 01:40:10,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580706246] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:40:10,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:40:10,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:40:10,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51307625] [2022-11-03 01:40:10,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:40:10,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:40:10,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:40:10,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:40:10,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:40:10,914 INFO L87 Difference]: Start difference. First operand 163 states and 256 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 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) [2022-11-03 01:40:11,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:11,168 INFO L93 Difference]: Finished difference Result 237 states and 341 transitions. [2022-11-03 01:40:11,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:40:11,169 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 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 [2022-11-03 01:40:11,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:11,178 INFO L225 Difference]: With dead ends: 237 [2022-11-03 01:40:11,178 INFO L226 Difference]: Without dead ends: 237 [2022-11-03 01:40:11,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:40:11,188 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 133 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:11,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 154 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:40:11,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-11-03 01:40:11,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 166. [2022-11-03 01:40:11,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 131 states have (on average 1.633587786259542) internal successors, (214), 148 states have internal predecessors, (214), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-11-03 01:40:11,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 259 transitions. [2022-11-03 01:40:11,232 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 259 transitions. Word has length 6 [2022-11-03 01:40:11,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:11,233 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 259 transitions. [2022-11-03 01:40:11,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 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) [2022-11-03 01:40:11,233 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 259 transitions. [2022-11-03 01:40:11,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-03 01:40:11,234 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:11,234 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:40:11,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 01:40:11,235 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:40:11,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:11,236 INFO L85 PathProgramCache]: Analyzing trace with hash 784618888, now seen corresponding path program 1 times [2022-11-03 01:40:11,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:11,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735301238] [2022-11-03 01:40:11,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:11,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:11,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:11,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:40:11,524 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:11,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735301238] [2022-11-03 01:40:11,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735301238] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:40:11,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:40:11,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:40:11,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274938018] [2022-11-03 01:40:11,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:40:11,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:40:11,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:40:11,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:40:11,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:40:11,528 INFO L87 Difference]: Start difference. First operand 166 states and 259 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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) [2022-11-03 01:40:11,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:11,700 INFO L93 Difference]: Finished difference Result 216 states and 302 transitions. [2022-11-03 01:40:11,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:40:11,701 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 7 [2022-11-03 01:40:11,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:11,704 INFO L225 Difference]: With dead ends: 216 [2022-11-03 01:40:11,704 INFO L226 Difference]: Without dead ends: 216 [2022-11-03 01:40:11,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:40:11,716 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 118 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:11,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 175 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:40:11,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-11-03 01:40:11,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 166. [2022-11-03 01:40:11,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 131 states have (on average 1.618320610687023) internal successors, (212), 148 states have internal predecessors, (212), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-11-03 01:40:11,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 257 transitions. [2022-11-03 01:40:11,749 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 257 transitions. Word has length 7 [2022-11-03 01:40:11,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:11,749 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 257 transitions. [2022-11-03 01:40:11,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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) [2022-11-03 01:40:11,750 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 257 transitions. [2022-11-03 01:40:11,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-03 01:40:11,750 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:11,750 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:40:11,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 01:40:11,751 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:40:11,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:11,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1446618201, now seen corresponding path program 1 times [2022-11-03 01:40:11,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:11,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754338559] [2022-11-03 01:40:11,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:11,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:11,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:11,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:40:11,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:11,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754338559] [2022-11-03 01:40:11,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754338559] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:40:11,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:40:11,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:40:11,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606826461] [2022-11-03 01:40:11,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:40:11,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:40:11,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:40:11,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:40:11,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:40:11,833 INFO L87 Difference]: Start difference. First operand 166 states and 257 transitions. Second operand has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-11-03 01:40:11,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:11,976 INFO L93 Difference]: Finished difference Result 244 states and 338 transitions. [2022-11-03 01:40:11,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:40:11,979 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 8 [2022-11-03 01:40:11,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:11,985 INFO L225 Difference]: With dead ends: 244 [2022-11-03 01:40:11,985 INFO L226 Difference]: Without dead ends: 244 [2022-11-03 01:40:11,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:40:11,986 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 175 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:11,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 160 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:40:12,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-11-03 01:40:12,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 201. [2022-11-03 01:40:12,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 164 states have (on average 1.5914634146341464) internal successors, (261), 182 states have internal predecessors, (261), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-11-03 01:40:12,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 306 transitions. [2022-11-03 01:40:12,055 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 306 transitions. Word has length 8 [2022-11-03 01:40:12,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:12,055 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 306 transitions. [2022-11-03 01:40:12,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-11-03 01:40:12,056 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 306 transitions. [2022-11-03 01:40:12,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 01:40:12,057 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:12,057 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:40:12,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 01:40:12,058 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:40:12,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:12,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1895491222, now seen corresponding path program 1 times [2022-11-03 01:40:12,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:12,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058129535] [2022-11-03 01:40:12,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:12,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:12,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:12,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:40:12,194 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:12,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058129535] [2022-11-03 01:40:12,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058129535] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:40:12,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:40:12,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:40:12,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349939010] [2022-11-03 01:40:12,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:40:12,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:40:12,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:40:12,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:40:12,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:40:12,196 INFO L87 Difference]: Start difference. First operand 201 states and 306 transitions. Second operand has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-11-03 01:40:12,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:12,320 INFO L93 Difference]: Finished difference Result 239 states and 321 transitions. [2022-11-03 01:40:12,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:40:12,321 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 9 [2022-11-03 01:40:12,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:12,322 INFO L225 Difference]: With dead ends: 239 [2022-11-03 01:40:12,322 INFO L226 Difference]: Without dead ends: 239 [2022-11-03 01:40:12,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:40:12,323 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 156 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:12,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 182 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:40:12,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-11-03 01:40:12,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 211. [2022-11-03 01:40:12,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 173 states have (on average 1.583815028901734) internal successors, (274), 192 states have internal predecessors, (274), 11 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-11-03 01:40:12,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 319 transitions. [2022-11-03 01:40:12,334 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 319 transitions. Word has length 9 [2022-11-03 01:40:12,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:12,335 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 319 transitions. [2022-11-03 01:40:12,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-11-03 01:40:12,335 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 319 transitions. [2022-11-03 01:40:12,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 01:40:12,336 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:12,336 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:40:12,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 01:40:12,336 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:40:12,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:12,337 INFO L85 PathProgramCache]: Analyzing trace with hash -354750800, now seen corresponding path program 1 times [2022-11-03 01:40:12,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:12,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548567244] [2022-11-03 01:40:12,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:12,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:12,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:12,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:40:12,501 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:12,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548567244] [2022-11-03 01:40:12,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548567244] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:40:12,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123935745] [2022-11-03 01:40:12,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:12,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:40:12,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:40:12,507 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:40:12,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:40:12,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:12,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:40:12,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:12,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:40:12,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:40:12,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:40:12,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123935745] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:40:12,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2122366821] [2022-11-03 01:40:13,004 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-03 01:40:13,004 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:40:13,009 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:40:13,015 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:40:13,016 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:40:13,118 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 157 for LOIs [2022-11-03 01:40:15,611 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:40:19,556 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2449#(and (<= |parse_input_~input#1.offset| 0) (= 6 |~#commands~0.base|) (<= 0 ~global~0.offset) (<= 3 |parse_input_~input#1.base|) (<= 0 |parse_input_~input#1.offset|) (<= 0 ~global~0.base) (<= |parse_input_~input#1.base| 3) (= |parse_input_#in~input#1.base| 3) (= |~#commands~0.offset| 0) (<= ~global~0.offset 0) (not (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|))) (<= ~global~0.base 0) (= |old(~global~0.base)| 0) (= |#NULL.offset| 0) (< |parse_input_~i~0#1| 2) (= |parse_input_#in~input#1.offset| 0) (= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= 0 |parse_input_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-03 01:40:19,556 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:40:19,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:40:19,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 11 [2022-11-03 01:40:19,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124075995] [2022-11-03 01:40:19,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:40:19,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 01:40:19,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:40:19,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 01:40:19,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-11-03 01:40:19,560 INFO L87 Difference]: Start difference. First operand 211 states and 319 transitions. Second operand has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:40:19,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:19,884 INFO L93 Difference]: Finished difference Result 293 states and 406 transitions. [2022-11-03 01:40:19,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:40:19,885 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-03 01:40:19,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:19,891 INFO L225 Difference]: With dead ends: 293 [2022-11-03 01:40:19,891 INFO L226 Difference]: Without dead ends: 293 [2022-11-03 01:40:19,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2022-11-03 01:40:19,892 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 402 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:19,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 381 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:40:19,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-11-03 01:40:19,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 223. [2022-11-03 01:40:19,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 182 states have (on average 1.5054945054945055) internal successors, (274), 204 states have internal predecessors, (274), 11 states have call successors, (11), 7 states have call predecessors, (11), 12 states have return successors, (44), 11 states have call predecessors, (44), 11 states have call successors, (44) [2022-11-03 01:40:19,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 329 transitions. [2022-11-03 01:40:19,908 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 329 transitions. Word has length 13 [2022-11-03 01:40:19,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:19,908 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 329 transitions. [2022-11-03 01:40:19,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:40:19,909 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 329 transitions. [2022-11-03 01:40:19,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-03 01:40:19,913 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:19,913 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:40:19,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:40:20,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:40:20,127 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:40:20,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:20,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1887627038, now seen corresponding path program 1 times [2022-11-03 01:40:20,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:20,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367026672] [2022-11-03 01:40:20,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:20,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:20,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:20,304 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:40:20,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:20,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367026672] [2022-11-03 01:40:20,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367026672] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:40:20,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701385746] [2022-11-03 01:40:20,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:20,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:40:20,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:40:20,306 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:40:20,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 01:40:20,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:20,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:40:20,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:20,511 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-03 01:40:20,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:40:20,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:40:20,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:40:20,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701385746] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:40:20,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1275892854] [2022-11-03 01:40:20,599 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-03 01:40:20,599 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:40:20,599 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:40:20,600 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:40:20,600 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:40:20,641 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 157 for LOIs [2022-11-03 01:40:22,454 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:40:27,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1275892854] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:40:27,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:40:27,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 4, 4] total 15 [2022-11-03 01:40:27,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170205748] [2022-11-03 01:40:27,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:40:27,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:40:27,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:40:27,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:40:27,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:40:27,017 INFO L87 Difference]: Start difference. First operand 223 states and 329 transitions. Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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) [2022-11-03 01:40:28,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:28,290 INFO L93 Difference]: Finished difference Result 211 states and 290 transitions. [2022-11-03 01:40:28,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:40:28,292 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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 14 [2022-11-03 01:40:28,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:28,294 INFO L225 Difference]: With dead ends: 211 [2022-11-03 01:40:28,294 INFO L226 Difference]: Without dead ends: 211 [2022-11-03 01:40:28,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-11-03 01:40:28,295 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 45 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:28,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 133 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 01:40:28,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-11-03 01:40:28,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 205. [2022-11-03 01:40:28,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 169 states have (on average 1.485207100591716) internal successors, (251), 192 states have internal predecessors, (251), 7 states have call successors, (7), 5 states have call predecessors, (7), 11 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2022-11-03 01:40:28,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 284 transitions. [2022-11-03 01:40:28,303 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 284 transitions. Word has length 14 [2022-11-03 01:40:28,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:28,303 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 284 transitions. [2022-11-03 01:40:28,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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) [2022-11-03 01:40:28,304 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 284 transitions. [2022-11-03 01:40:28,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-03 01:40:28,305 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:28,305 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:40:28,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:40:28,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:40:28,523 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:40:28,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:28,523 INFO L85 PathProgramCache]: Analyzing trace with hash 351522922, now seen corresponding path program 1 times [2022-11-03 01:40:28,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:28,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403513685] [2022-11-03 01:40:28,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:28,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:28,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:28,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:40:28,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:28,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403513685] [2022-11-03 01:40:28,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403513685] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:40:28,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:40:28,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:40:28,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157311669] [2022-11-03 01:40:28,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:40:28,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:40:28,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:40:28,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:40:28,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:40:28,560 INFO L87 Difference]: Start difference. First operand 205 states and 284 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 01:40:28,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:28,572 INFO L93 Difference]: Finished difference Result 211 states and 288 transitions. [2022-11-03 01:40:28,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:40:28,573 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-11-03 01:40:28,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:28,574 INFO L225 Difference]: With dead ends: 211 [2022-11-03 01:40:28,575 INFO L226 Difference]: Without dead ends: 211 [2022-11-03 01:40:28,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:40:28,576 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 13 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:28,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 112 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:40:28,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-11-03 01:40:28,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 205. [2022-11-03 01:40:28,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 169 states have (on average 1.467455621301775) internal successors, (248), 192 states have internal predecessors, (248), 7 states have call successors, (7), 5 states have call predecessors, (7), 11 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2022-11-03 01:40:28,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 281 transitions. [2022-11-03 01:40:28,584 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 281 transitions. Word has length 23 [2022-11-03 01:40:28,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:28,584 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 281 transitions. [2022-11-03 01:40:28,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 01:40:28,584 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 281 transitions. [2022-11-03 01:40:28,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-03 01:40:28,585 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:28,585 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:40:28,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 01:40:28,586 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:40:28,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:28,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1643273810, now seen corresponding path program 1 times [2022-11-03 01:40:28,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:28,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025391936] [2022-11-03 01:40:28,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:28,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:28,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:28,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:40:28,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:28,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025391936] [2022-11-03 01:40:28,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025391936] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:40:28,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343329297] [2022-11-03 01:40:28,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:28,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:40:28,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:40:28,887 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:40:28,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 01:40:28,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:28,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 01:40:28,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:29,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:29,287 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:40:29,351 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:40:29,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:40:29,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343329297] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:40:29,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1474108250] [2022-11-03 01:40:29,546 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-03 01:40:29,546 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:40:29,546 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:40:29,546 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:40:29,546 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:40:29,686 INFO L356 Elim1Store]: treesize reduction 46, result has 64.6 percent of original size [2022-11-03 01:40:29,687 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 case distinctions, treesize of input 43 treesize of output 111 [2022-11-03 01:40:29,998 INFO L356 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-03 01:40:29,999 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2022-11-03 01:40:30,343 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 187 for LOIs [2022-11-03 01:40:31,441 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:40:44,957 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4014#(and (= ~global~0.base |old(~global~0.base)|) (= |old(#length)| |#length|) (<= 0 |#NULL.base|) (<= 0 |old(~global~0.offset)|) (<= 6 |~#commands~0.base|) (= ~state~0 |old(~state~0)|) (<= 0 ~global~0.offset) (<= |#NULL.offset| 0) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (<= |~#commands~0.base| 6) (<= 0 |parse_input_#in~input#1.offset|) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (= |parse_input_#in~input#1.base| 4) (<= 0 |~#commands~0.offset|) (= |parse_input_~i~0#1| 0) (<= |parse_input_#in~input#1.offset| 0) (<= ~global~0.offset 0) (<= |#NULL.base| 0) (not (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|))) (= |old(#valid)| |#valid|) (<= 0 |#NULL.offset|) (<= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= |~#commands~0.offset| 0))' at error location [2022-11-03 01:40:44,957 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:40:44,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:40:44,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 12 [2022-11-03 01:40:44,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876713894] [2022-11-03 01:40:44,958 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:40:44,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 01:40:44,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:40:44,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 01:40:44,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=938, Unknown=0, NotChecked=0, Total=1190 [2022-11-03 01:40:44,987 INFO L87 Difference]: Start difference. First operand 205 states and 281 transitions. Second operand has 14 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 01:40:45,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:45,822 INFO L93 Difference]: Finished difference Result 392 states and 514 transitions. [2022-11-03 01:40:45,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 01:40:45,823 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2022-11-03 01:40:45,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:45,825 INFO L225 Difference]: With dead ends: 392 [2022-11-03 01:40:45,825 INFO L226 Difference]: Without dead ends: 392 [2022-11-03 01:40:45,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=401, Invalid=1669, Unknown=0, NotChecked=0, Total=2070 [2022-11-03 01:40:45,827 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 581 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:45,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [581 Valid, 336 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 272 Invalid, 0 Unknown, 93 Unchecked, 0.3s Time] [2022-11-03 01:40:45,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-11-03 01:40:45,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 286. [2022-11-03 01:40:45,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 245 states have (on average 1.5142857142857142) internal successors, (371), 269 states have internal predecessors, (371), 9 states have call successors, (9), 7 states have call predecessors, (9), 14 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2022-11-03 01:40:45,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 410 transitions. [2022-11-03 01:40:45,839 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 410 transitions. Word has length 25 [2022-11-03 01:40:45,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:45,840 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 410 transitions. [2022-11-03 01:40:45,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 01:40:45,840 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 410 transitions. [2022-11-03 01:40:45,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-03 01:40:45,842 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:45,843 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:40:45,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:40:46,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 01:40:46,051 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:40:46,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:46,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1123038032, now seen corresponding path program 1 times [2022-11-03 01:40:46,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:46,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117898326] [2022-11-03 01:40:46,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:46,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:46,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:46,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:40:46,206 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:46,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117898326] [2022-11-03 01:40:46,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117898326] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:40:46,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727722245] [2022-11-03 01:40:46,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:46,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:40:46,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:40:46,208 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:40:46,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 01:40:46,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:46,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:40:46,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:46,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:40:46,409 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:40:46,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727722245] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:40:46,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:40:46,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 8 [2022-11-03 01:40:46,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726423616] [2022-11-03 01:40:46,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:40:46,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:40:46,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:40:46,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:40:46,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:40:46,411 INFO L87 Difference]: Start difference. First operand 286 states and 410 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 01:40:46,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:46,502 INFO L93 Difference]: Finished difference Result 376 states and 524 transitions. [2022-11-03 01:40:46,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:40:46,503 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-11-03 01:40:46,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:46,504 INFO L225 Difference]: With dead ends: 376 [2022-11-03 01:40:46,505 INFO L226 Difference]: Without dead ends: 376 [2022-11-03 01:40:46,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:40:46,506 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 128 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:46,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 141 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:40:46,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-11-03 01:40:46,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 307. [2022-11-03 01:40:46,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 266 states have (on average 1.5263157894736843) internal successors, (406), 290 states have internal predecessors, (406), 9 states have call successors, (9), 7 states have call predecessors, (9), 14 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2022-11-03 01:40:46,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 445 transitions. [2022-11-03 01:40:46,518 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 445 transitions. Word has length 26 [2022-11-03 01:40:46,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:46,519 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 445 transitions. [2022-11-03 01:40:46,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 01:40:46,519 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 445 transitions. [2022-11-03 01:40:46,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-03 01:40:46,520 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:46,520 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:40:46,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:40:46,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-03 01:40:46,735 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:40:46,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:46,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1361832013, now seen corresponding path program 1 times [2022-11-03 01:40:46,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:46,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050643134] [2022-11-03 01:40:46,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:46,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:46,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:47,281 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:40:47,282 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:47,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050643134] [2022-11-03 01:40:47,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050643134] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:40:47,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994608549] [2022-11-03 01:40:47,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:47,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:40:47,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:40:47,284 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:40:47,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 01:40:47,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:47,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 01:40:47,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:47,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:47,724 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:40:47,820 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 01:40:47,823 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 01:40:47,853 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:40:47,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:40:48,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994608549] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:40:48,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1075641562] [2022-11-03 01:40:48,031 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-03 01:40:48,031 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:40:48,031 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:40:48,032 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:40:48,032 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:40:48,209 INFO L356 Elim1Store]: treesize reduction 46, result has 64.6 percent of original size [2022-11-03 01:40:48,209 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 case distinctions, treesize of input 43 treesize of output 111 [2022-11-03 01:40:48,448 INFO L356 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-03 01:40:48,448 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2022-11-03 01:40:48,713 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 187 for LOIs [2022-11-03 01:40:49,690 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:41:02,866 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5623#(and (= ~global~0.base |old(~global~0.base)|) (= |old(#length)| |#length|) (<= 0 |#NULL.base|) (<= 0 |old(~global~0.offset)|) (<= 6 |~#commands~0.base|) (= ~state~0 |old(~state~0)|) (<= 0 ~global~0.offset) (<= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)) |parse_input_#t~mem3#1.offset|) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|)) (<= |~#commands~0.base| 6) (<= 0 |parse_input_#in~input#1.offset|) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (= |parse_input_#in~input#1.base| 4) (<= 0 |~#commands~0.offset|) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (= |parse_input_#t~mem3#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) (= |parse_input_~i~0#1| 0) (<= |parse_input_#in~input#1.offset| 0) (<= ~global~0.offset 0) (<= |#NULL.base| 0) (or (not (< |parse_input_#t~mem3#1.offset| (select |#length| |parse_input_#t~mem3#1.base|))) (not (<= 0 |parse_input_#t~mem3#1.offset|))) (= |old(#valid)| |#valid|) (<= 0 |#NULL.offset|) (<= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= |~#commands~0.offset| 0) (= (select |#valid| |~#commands~0.base|) 1))' at error location [2022-11-03 01:41:02,866 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:41:02,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:41:02,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2022-11-03 01:41:02,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388909691] [2022-11-03 01:41:02,868 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:41:02,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-03 01:41:02,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:02,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-03 01:41:02,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=1169, Unknown=0, NotChecked=0, Total=1482 [2022-11-03 01:41:02,869 INFO L87 Difference]: Start difference. First operand 307 states and 445 transitions. Second operand has 18 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 01:41:04,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:04,315 INFO L93 Difference]: Finished difference Result 641 states and 824 transitions. [2022-11-03 01:41:04,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 01:41:04,316 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2022-11-03 01:41:04,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:04,318 INFO L225 Difference]: With dead ends: 641 [2022-11-03 01:41:04,318 INFO L226 Difference]: Without dead ends: 641 [2022-11-03 01:41:04,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=638, Invalid=2554, Unknown=0, NotChecked=0, Total=3192 [2022-11-03 01:41:04,320 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 1037 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1037 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:04,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1037 Valid, 396 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 375 Invalid, 0 Unknown, 165 Unchecked, 0.5s Time] [2022-11-03 01:41:04,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2022-11-03 01:41:04,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 360. [2022-11-03 01:41:04,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 317 states have (on average 1.498422712933754) internal successors, (475), 342 states have internal predecessors, (475), 9 states have call successors, (9), 8 states have call predecessors, (9), 16 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2022-11-03 01:41:04,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 511 transitions. [2022-11-03 01:41:04,336 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 511 transitions. Word has length 27 [2022-11-03 01:41:04,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:04,337 INFO L495 AbstractCegarLoop]: Abstraction has 360 states and 511 transitions. [2022-11-03 01:41:04,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 01:41:04,337 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 511 transitions. [2022-11-03 01:41:04,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-03 01:41:04,339 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:04,339 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:04,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:04,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:04,559 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:41:04,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:04,559 INFO L85 PathProgramCache]: Analyzing trace with hash -732880510, now seen corresponding path program 1 times [2022-11-03 01:41:04,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:04,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284931419] [2022-11-03 01:41:04,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:04,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:04,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:04,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:41:04,765 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:04,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284931419] [2022-11-03 01:41:04,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284931419] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:04,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879327188] [2022-11-03 01:41:04,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:04,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:04,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:04,767 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:04,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 01:41:04,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:04,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:41:04,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:04,974 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 01:41:04,974 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:41:05,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:41:05,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:41:05,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879327188] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:05,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1286558633] [2022-11-03 01:41:05,083 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-03 01:41:05,086 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:41:05,087 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:41:05,087 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:41:05,087 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:41:05,228 INFO L356 Elim1Store]: treesize reduction 46, result has 64.6 percent of original size [2022-11-03 01:41:05,229 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 case distinctions, treesize of input 43 treesize of output 111 [2022-11-03 01:41:05,486 INFO L356 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-03 01:41:05,486 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2022-11-03 01:41:05,738 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 187 for LOIs [2022-11-03 01:41:06,576 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:41:23,913 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6798#(and (= ~global~0.base |old(~global~0.base)|) (= |old(#length)| |#length|) (<= 0 |#NULL.base|) (<= 0 |old(~global~0.offset)|) (<= 6 |~#commands~0.base|) (not (= (select |#valid| |parse_input_~input#1.base|) 1)) (= ~state~0 |old(~state~0)|) (<= 0 ~global~0.offset) (< |parse_input_#t~mem3#1.offset| (select |#length| |parse_input_#t~mem3#1.base|)) (<= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)) |parse_input_#t~mem3#1.offset|) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|)) (<= |~#commands~0.base| 6) (<= 0 |parse_input_#in~input#1.offset|) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (<= 0 |parse_input_#t~mem3#1.offset|) (= |parse_input_#in~input#1.base| 4) (<= 0 |~#commands~0.offset|) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (= |parse_input_#t~mem3#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) (= |parse_input_~i~0#1| 0) (<= |parse_input_#in~input#1.offset| 0) (<= ~global~0.offset 0) (<= |#NULL.base| 0) (= |old(#valid)| |#valid|) (<= 0 |#NULL.offset|) (<= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= |~#commands~0.offset| 0) (= (select |#valid| |~#commands~0.base|) 1))' at error location [2022-11-03 01:41:23,913 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:41:23,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:41:23,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2022-11-03 01:41:23,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108975488] [2022-11-03 01:41:23,913 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:41:23,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 01:41:23,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:23,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 01:41:23,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=696, Unknown=2, NotChecked=0, Total=930 [2022-11-03 01:41:23,916 INFO L87 Difference]: Start difference. First operand 360 states and 511 transitions. Second operand has 12 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 01:41:24,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:24,389 INFO L93 Difference]: Finished difference Result 465 states and 616 transitions. [2022-11-03 01:41:24,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 01:41:24,390 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2022-11-03 01:41:24,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:24,393 INFO L225 Difference]: With dead ends: 465 [2022-11-03 01:41:24,393 INFO L226 Difference]: Without dead ends: 465 [2022-11-03 01:41:24,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=340, Invalid=1140, Unknown=2, NotChecked=0, Total=1482 [2022-11-03 01:41:24,395 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 389 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:24,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 360 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 182 Invalid, 0 Unknown, 48 Unchecked, 0.2s Time] [2022-11-03 01:41:24,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-11-03 01:41:24,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 395. [2022-11-03 01:41:24,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 351 states have (on average 1.4615384615384615) internal successors, (513), 376 states have internal predecessors, (513), 9 states have call successors, (9), 9 states have call predecessors, (9), 17 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2022-11-03 01:41:24,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 548 transitions. [2022-11-03 01:41:24,408 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 548 transitions. Word has length 28 [2022-11-03 01:41:24,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:24,408 INFO L495 AbstractCegarLoop]: Abstraction has 395 states and 548 transitions. [2022-11-03 01:41:24,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 01:41:24,409 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 548 transitions. [2022-11-03 01:41:24,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-03 01:41:24,415 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:24,415 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:24,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:24,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-03 01:41:24,631 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:41:24,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:24,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1244459281, now seen corresponding path program 1 times [2022-11-03 01:41:24,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:24,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769866453] [2022-11-03 01:41:24,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:24,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:24,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:24,864 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:41:24,865 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:24,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769866453] [2022-11-03 01:41:24,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769866453] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:24,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786236381] [2022-11-03 01:41:24,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:24,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:24,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:24,867 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:24,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 01:41:24,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:24,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 01:41:24,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:25,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:41:25,087 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:41:25,178 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:41:25,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:41:25,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786236381] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:25,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [710770610] [2022-11-03 01:41:25,314 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-03 01:41:25,314 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:41:25,314 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:41:25,314 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:41:25,314 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:41:25,451 INFO L356 Elim1Store]: treesize reduction 46, result has 64.6 percent of original size [2022-11-03 01:41:25,451 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 case distinctions, treesize of input 43 treesize of output 111 [2022-11-03 01:41:25,699 INFO L356 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-03 01:41:25,700 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2022-11-03 01:41:26,042 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 187 for LOIs [2022-11-03 01:41:26,949 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:41:40,344 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7823#(and (= ~global~0.base |old(~global~0.base)|) (= |old(#length)| |#length|) (<= 0 |#NULL.base|) (<= 0 |old(~global~0.offset)|) (= (select |#valid| |parse_input_~input#1.base|) 1) (<= 6 |~#commands~0.base|) (not (< |parse_input_~input#1.offset| (select |#length| |parse_input_~input#1.base|))) (= ~state~0 |old(~state~0)|) (<= 0 ~global~0.offset) (< |parse_input_#t~mem3#1.offset| (select |#length| |parse_input_#t~mem3#1.base|)) (<= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)) |parse_input_#t~mem3#1.offset|) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|)) (<= |~#commands~0.base| 6) (<= 0 |parse_input_#in~input#1.offset|) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (<= 0 |parse_input_#t~mem3#1.offset|) (= |parse_input_#in~input#1.base| 4) (<= 0 |~#commands~0.offset|) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (= |parse_input_#t~mem3#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) (= |parse_input_~i~0#1| 0) (<= |parse_input_#in~input#1.offset| 0) (<= ~global~0.offset 0) (<= |#NULL.base| 0) (= |old(#valid)| |#valid|) (<= 0 |#NULL.offset|) (<= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= |~#commands~0.offset| 0) (= (select |#valid| |~#commands~0.base|) 1))' at error location [2022-11-03 01:41:40,345 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:41:40,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:41:40,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 13 [2022-11-03 01:41:40,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135836091] [2022-11-03 01:41:40,346 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:41:40,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-03 01:41:40,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:40,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-03 01:41:40,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1084, Unknown=0, NotChecked=0, Total=1332 [2022-11-03 01:41:40,348 INFO L87 Difference]: Start difference. First operand 395 states and 548 transitions. Second operand has 15 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 01:41:41,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:41,075 INFO L93 Difference]: Finished difference Result 483 states and 612 transitions. [2022-11-03 01:41:41,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 01:41:41,075 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2022-11-03 01:41:41,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:41,078 INFO L225 Difference]: With dead ends: 483 [2022-11-03 01:41:41,079 INFO L226 Difference]: Without dead ends: 483 [2022-11-03 01:41:41,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=405, Invalid=1851, Unknown=0, NotChecked=0, Total=2256 [2022-11-03 01:41:41,080 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 407 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:41,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 412 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 344 Invalid, 0 Unknown, 93 Unchecked, 0.3s Time] [2022-11-03 01:41:41,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-11-03 01:41:41,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 415. [2022-11-03 01:41:41,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 369 states have (on average 1.4607046070460705) internal successors, (539), 396 states have internal predecessors, (539), 9 states have call successors, (9), 9 states have call predecessors, (9), 19 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2022-11-03 01:41:41,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 574 transitions. [2022-11-03 01:41:41,097 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 574 transitions. Word has length 29 [2022-11-03 01:41:41,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:41,098 INFO L495 AbstractCegarLoop]: Abstraction has 415 states and 574 transitions. [2022-11-03 01:41:41,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 01:41:41,098 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 574 transitions. [2022-11-03 01:41:41,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-03 01:41:41,099 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:41,099 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:41,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:41,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 01:41:41,315 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:41:41,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:41,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1727568309, now seen corresponding path program 1 times [2022-11-03 01:41:41,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:41,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234339642] [2022-11-03 01:41:41,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:41,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:41,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:41,667 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:41:41,667 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:41,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234339642] [2022-11-03 01:41:41,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234339642] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:41,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968516039] [2022-11-03 01:41:41,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:41,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:41,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:41,670 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:41,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 01:41:41,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:41,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 01:41:41,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:41,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:41:41,982 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:41:42,126 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:41:42,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:41:42,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968516039] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:42,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1269238732] [2022-11-03 01:41:42,351 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-03 01:41:42,352 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:41:42,352 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:41:42,352 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:41:42,352 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:41:42,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:41:42,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:41:42,558 INFO L356 Elim1Store]: treesize reduction 148, result has 13.5 percent of original size [2022-11-03 01:41:42,558 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 183 treesize of output 182 [2022-11-03 01:41:42,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:41:42,640 INFO L356 Elim1Store]: treesize reduction 174, result has 23.0 percent of original size [2022-11-03 01:41:42,641 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 183 treesize of output 206 [2022-11-03 01:41:43,100 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 41 for LOIs [2022-11-03 01:41:43,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:41:43,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:41:43,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:41:43,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:41:43,319 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-03 01:41:43,319 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2022-11-03 01:41:43,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:41:43,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:41:43,375 INFO L356 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2022-11-03 01:41:43,375 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 41 [2022-11-03 01:41:43,593 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:41:47,122 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8922#(and (<= |parse_input_~input#1.offset| 0) (= 6 |~#commands~0.base|) (<= 0 ~global~0.offset) (<= 3 |parse_input_~input#1.base|) (<= 0 |parse_input_~input#1.offset|) (= |~#commands~0.offset| 0) (<= ~global~0.offset 0) (not (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|))) (<= |parse_input_#in~input#1.base| 4) (= |#NULL.offset| 0) (<= |parse_input_~input#1.base| 4) (< |parse_input_~i~0#1| 2) (= |parse_input_#in~input#1.offset| 0) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= 0 |parse_input_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-03 01:41:47,123 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:41:47,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:41:47,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 15 [2022-11-03 01:41:47,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55247251] [2022-11-03 01:41:47,123 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:41:47,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 01:41:47,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:47,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 01:41:47,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1317, Unknown=0, NotChecked=0, Total=1482 [2022-11-03 01:41:47,124 INFO L87 Difference]: Start difference. First operand 415 states and 574 transitions. Second operand has 17 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 01:41:48,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:48,091 INFO L93 Difference]: Finished difference Result 486 states and 618 transitions. [2022-11-03 01:41:48,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 01:41:48,092 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2022-11-03 01:41:48,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:48,095 INFO L225 Difference]: With dead ends: 486 [2022-11-03 01:41:48,095 INFO L226 Difference]: Without dead ends: 486 [2022-11-03 01:41:48,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=333, Invalid=2217, Unknown=0, NotChecked=0, Total=2550 [2022-11-03 01:41:48,099 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 476 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:48,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [476 Valid, 452 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 455 Invalid, 0 Unknown, 89 Unchecked, 0.4s Time] [2022-11-03 01:41:48,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2022-11-03 01:41:48,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 279. [2022-11-03 01:41:48,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 244 states have (on average 1.4426229508196722) internal successors, (352), 266 states have internal predecessors, (352), 6 states have call successors, (6), 6 states have call predecessors, (6), 11 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-11-03 01:41:48,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 373 transitions. [2022-11-03 01:41:48,109 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 373 transitions. Word has length 33 [2022-11-03 01:41:48,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:48,109 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 373 transitions. [2022-11-03 01:41:48,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 01:41:48,110 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 373 transitions. [2022-11-03 01:41:48,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 01:41:48,110 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:48,111 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:48,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:48,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 01:41:48,327 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:41:48,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:48,327 INFO L85 PathProgramCache]: Analyzing trace with hash 2015009977, now seen corresponding path program 1 times [2022-11-03 01:41:48,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:48,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949119938] [2022-11-03 01:41:48,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:48,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:48,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:48,701 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:41:48,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:48,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949119938] [2022-11-03 01:41:48,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949119938] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:48,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976333040] [2022-11-03 01:41:48,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:48,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:48,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:48,703 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:48,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 01:41:48,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:48,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 01:41:48,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:48,958 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 01:41:48,962 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:41:49,067 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-03 01:41:49,085 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:41:49,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:41:49,276 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:41:49,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976333040] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:41:49,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1329332855] [2022-11-03 01:41:49,279 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-03 01:41:49,279 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:41:49,279 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:41:49,280 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:41:49,280 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:41:49,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:41:49,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:41:49,472 INFO L356 Elim1Store]: treesize reduction 165, result has 19.9 percent of original size [2022-11-03 01:41:49,472 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 196 treesize of output 210 [2022-11-03 01:41:49,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:41:49,573 INFO L356 Elim1Store]: treesize reduction 187, result has 29.7 percent of original size [2022-11-03 01:41:49,574 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 185 treesize of output 230 [2022-11-03 01:41:50,264 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 187 for LOIs [2022-11-03 01:41:50,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:41:50,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:41:50,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:41:50,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:41:50,667 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-03 01:41:50,668 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2022-11-03 01:41:50,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:41:50,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:41:50,724 INFO L356 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2022-11-03 01:41:50,724 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 41 [2022-11-03 01:41:50,934 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:41:54,321 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9948#(and (<= |parse_input_~input#1.offset| 0) (= 6 |~#commands~0.base|) (<= 0 ~global~0.offset) (<= 3 |parse_input_~input#1.base|) (<= 0 |parse_input_~input#1.offset|) (= |~#commands~0.offset| 0) (<= ~global~0.offset 0) (<= |parse_input_#in~input#1.base| 4) (= |#NULL.offset| 0) (<= |parse_input_~input#1.base| 4) (= |parse_input_#in~input#1.offset| 0) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (not (= (select |#valid| |parse_input_#t~mem3#1.base|) 1)) (<= 0 |#StackHeapBarrier|) (<= 0 |parse_input_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-03 01:41:54,321 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:41:54,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:41:54,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 5] total 17 [2022-11-03 01:41:54,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167956509] [2022-11-03 01:41:54,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:41:54,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-03 01:41:54,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:54,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-03 01:41:54,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1165, Unknown=0, NotChecked=0, Total=1332 [2022-11-03 01:41:54,324 INFO L87 Difference]: Start difference. First operand 279 states and 373 transitions. Second operand has 19 states, 18 states have (on average 5.055555555555555) internal successors, (91), 18 states have internal predecessors, (91), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-03 01:41:55,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:55,111 INFO L93 Difference]: Finished difference Result 350 states and 441 transitions. [2022-11-03 01:41:55,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 01:41:55,112 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 5.055555555555555) internal successors, (91), 18 states have internal predecessors, (91), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2022-11-03 01:41:55,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:55,114 INFO L225 Difference]: With dead ends: 350 [2022-11-03 01:41:55,114 INFO L226 Difference]: Without dead ends: 350 [2022-11-03 01:41:55,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 68 SyntacticMatches, 9 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=331, Invalid=2021, Unknown=0, NotChecked=0, Total=2352 [2022-11-03 01:41:55,115 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 355 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:55,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 509 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 418 Invalid, 0 Unknown, 45 Unchecked, 0.3s Time] [2022-11-03 01:41:55,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-11-03 01:41:55,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 279. [2022-11-03 01:41:55,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 244 states have (on average 1.4344262295081966) internal successors, (350), 266 states have internal predecessors, (350), 6 states have call successors, (6), 6 states have call predecessors, (6), 11 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-11-03 01:41:55,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 371 transitions. [2022-11-03 01:41:55,126 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 371 transitions. Word has length 34 [2022-11-03 01:41:55,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:55,126 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 371 transitions. [2022-11-03 01:41:55,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 5.055555555555555) internal successors, (91), 18 states have internal predecessors, (91), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-03 01:41:55,127 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 371 transitions. [2022-11-03 01:41:55,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-03 01:41:55,127 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:55,127 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:55,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:55,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-03 01:41:55,343 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:41:55,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:55,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1959200108, now seen corresponding path program 1 times [2022-11-03 01:41:55,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:55,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576851263] [2022-11-03 01:41:55,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:55,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:55,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:55,818 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:41:55,818 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:55,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576851263] [2022-11-03 01:41:55,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576851263] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:55,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752220866] [2022-11-03 01:41:55,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:55,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:55,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:55,821 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:55,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 01:41:55,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:55,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 01:41:55,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:56,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:41:56,240 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:41:56,429 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-03 01:41:56,432 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-03 01:41:56,462 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:41:56,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:41:56,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752220866] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:56,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [87671259] [2022-11-03 01:41:56,749 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-03 01:41:56,749 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:41:56,749 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:41:56,749 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:41:56,749 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:41:56,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:41:56,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:41:56,962 INFO L356 Elim1Store]: treesize reduction 148, result has 13.5 percent of original size [2022-11-03 01:41:56,962 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 183 treesize of output 182 [2022-11-03 01:41:56,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:41:57,032 INFO L356 Elim1Store]: treesize reduction 174, result has 23.0 percent of original size [2022-11-03 01:41:57,033 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 183 treesize of output 206 [2022-11-03 01:41:57,415 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 41 for LOIs [2022-11-03 01:41:57,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:41:57,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:41:57,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:41:57,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:41:57,615 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-03 01:41:57,615 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2022-11-03 01:41:57,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:41:57,678 INFO L356 Elim1Store]: treesize reduction 70, result has 28.6 percent of original size [2022-11-03 01:41:57,678 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 27 treesize of output 45 [2022-11-03 01:41:57,833 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:42:01,233 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10791#(and (<= |parse_input_~input#1.offset| 0) (= 6 |~#commands~0.base|) (<= 0 ~global~0.offset) (<= 3 |parse_input_~input#1.base|) (<= 0 |parse_input_~input#1.offset|) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (= |~#commands~0.offset| 0) (<= ~global~0.offset 0) (<= |parse_input_#in~input#1.base| 4) (= |#NULL.offset| 0) (<= |parse_input_~input#1.base| 4) (or (not (< |parse_input_#t~mem3#1.offset| (select |#length| |parse_input_#t~mem3#1.base|))) (not (<= 0 |parse_input_#t~mem3#1.offset|))) (= |parse_input_#in~input#1.offset| 0) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= 0 |parse_input_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-03 01:42:01,234 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:42:01,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:42:01,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 16 [2022-11-03 01:42:01,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611540956] [2022-11-03 01:42:01,234 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:42:01,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-03 01:42:01,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:42:01,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-03 01:42:01,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1466, Unknown=0, NotChecked=0, Total=1640 [2022-11-03 01:42:01,236 INFO L87 Difference]: Start difference. First operand 279 states and 371 transitions. Second operand has 18 states, 15 states have (on average 4.266666666666667) internal successors, (64), 15 states have internal predecessors, (64), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 01:42:02,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:02,212 INFO L93 Difference]: Finished difference Result 353 states and 430 transitions. [2022-11-03 01:42:02,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:42:02,213 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 4.266666666666667) internal successors, (64), 15 states have internal predecessors, (64), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2022-11-03 01:42:02,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:02,215 INFO L225 Difference]: With dead ends: 353 [2022-11-03 01:42:02,216 INFO L226 Difference]: Without dead ends: 353 [2022-11-03 01:42:02,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=371, Invalid=2599, Unknown=0, NotChecked=0, Total=2970 [2022-11-03 01:42:02,217 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 408 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:02,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [408 Valid, 454 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 458 Invalid, 0 Unknown, 94 Unchecked, 0.4s Time] [2022-11-03 01:42:02,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-11-03 01:42:02,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 281. [2022-11-03 01:42:02,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 246 states have (on average 1.41869918699187) internal successors, (349), 268 states have internal predecessors, (349), 6 states have call successors, (6), 6 states have call predecessors, (6), 11 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-11-03 01:42:02,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 370 transitions. [2022-11-03 01:42:02,231 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 370 transitions. Word has length 35 [2022-11-03 01:42:02,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:02,234 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 370 transitions. [2022-11-03 01:42:02,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 4.266666666666667) internal successors, (64), 15 states have internal predecessors, (64), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 01:42:02,235 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 370 transitions. [2022-11-03 01:42:02,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-03 01:42:02,237 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:02,237 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:02,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:02,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-03 01:42:02,443 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:42:02,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:02,443 INFO L85 PathProgramCache]: Analyzing trace with hash -724690043, now seen corresponding path program 1 times [2022-11-03 01:42:02,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:42:02,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064910600] [2022-11-03 01:42:02,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:02,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:42:02,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:02,505 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:02,505 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:42:02,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064910600] [2022-11-03 01:42:02,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064910600] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:42:02,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816929810] [2022-11-03 01:42:02,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:02,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:42:02,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:42:02,508 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:42:02,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 01:42:02,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:02,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:42:02,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:02,649 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:02,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:42:02,699 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:02,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816929810] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:42:02,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1283270889] [2022-11-03 01:42:02,708 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-03 01:42:02,708 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:42:02,708 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:42:02,708 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:42:02,709 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:42:02,841 INFO L356 Elim1Store]: treesize reduction 46, result has 64.6 percent of original size [2022-11-03 01:42:02,841 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 case distinctions, treesize of input 43 treesize of output 111 [2022-11-03 01:42:03,102 INFO L356 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-03 01:42:03,103 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2022-11-03 01:42:03,343 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 187 for LOIs [2022-11-03 01:42:04,133 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:42:16,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1283270889] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:42:16,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:42:16,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [3, 3, 3] total 21 [2022-11-03 01:42:16,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598692521] [2022-11-03 01:42:16,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:16,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 01:42:16,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:42:16,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 01:42:16,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2022-11-03 01:42:16,837 INFO L87 Difference]: Start difference. First operand 281 states and 370 transitions. Second operand has 20 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 01:42:19,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:19,422 INFO L93 Difference]: Finished difference Result 504 states and 664 transitions. [2022-11-03 01:42:19,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 01:42:19,429 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-11-03 01:42:19,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:19,433 INFO L225 Difference]: With dead ends: 504 [2022-11-03 01:42:19,433 INFO L226 Difference]: Without dead ends: 504 [2022-11-03 01:42:19,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2022-11-03 01:42:19,435 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 135 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:19,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 201 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 766 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-03 01:42:19,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-11-03 01:42:19,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 459. [2022-11-03 01:42:19,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 412 states have (on average 1.4150485436893203) internal successors, (583), 438 states have internal predecessors, (583), 10 states have call successors, (10), 10 states have call predecessors, (10), 19 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) [2022-11-03 01:42:19,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 625 transitions. [2022-11-03 01:42:19,460 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 625 transitions. Word has length 37 [2022-11-03 01:42:19,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:19,461 INFO L495 AbstractCegarLoop]: Abstraction has 459 states and 625 transitions. [2022-11-03 01:42:19,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 01:42:19,461 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 625 transitions. [2022-11-03 01:42:19,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-03 01:42:19,462 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:19,463 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:19,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:19,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-03 01:42:19,682 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting parse_inputErr17ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:42:19,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:19,683 INFO L85 PathProgramCache]: Analyzing trace with hash -990554755, now seen corresponding path program 1 times [2022-11-03 01:42:19,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:42:19,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656032599] [2022-11-03 01:42:19,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:19,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:42:19,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:19,766 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:19,767 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:42:19,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656032599] [2022-11-03 01:42:19,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656032599] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:42:19,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386952073] [2022-11-03 01:42:19,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:19,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:42:19,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:42:19,769 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:42:19,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 01:42:19,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:19,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:42:19,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:19,908 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:19,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:42:19,981 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:19,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386952073] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:42:19,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1863821340] [2022-11-03 01:42:19,983 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-03 01:42:19,984 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:42:19,984 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:42:19,984 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:42:19,984 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:42:20,097 INFO L356 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-03 01:42:20,098 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2022-11-03 01:42:20,119 INFO L356 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-11-03 01:42:20,120 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 51 [2022-11-03 01:42:20,407 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 41 for LOIs [2022-11-03 01:42:20,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:20,562 INFO L356 Elim1Store]: treesize reduction 46, result has 62.3 percent of original size [2022-11-03 01:42:20,562 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 103 [2022-11-03 01:42:20,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:20,728 INFO L356 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-11-03 01:42:20,728 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 61 [2022-11-03 01:42:20,913 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:42:25,736 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12899#(and (<= |parse_input_~input#1.offset| 0) (<= 0 |#NULL.base|) (<= 0 |old(~global~0.offset)|) (not (< ~global~0.base |#StackHeapBarrier|)) (<= 6 |~#commands~0.base|) (<= 0 |parse_input_c1_~x~0#1.offset|) (<= 3 |parse_input_~input#1.base|) (<= |#NULL.offset| 0) (<= 0 |parse_input_~input#1.offset|) (<= |~#commands~0.base| 6) (<= 0 |parse_input_#in~input#1.offset|) (= ~global~0.offset 0) (<= 0 |~#commands~0.offset|) (<= |parse_input_#in~input#1.offset| 0) (<= |#NULL.base| 0) (<= |parse_input_#in~input#1.base| 4) (<= |parse_input_c1_~x~0#1.offset| 0) (<= |parse_input_~input#1.base| 4) (<= |parse_input_~i~0#1| 0) (<= 3 |parse_input_#in~input#1.base|) (<= 0 |#NULL.offset|) (<= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= 0 |parse_input_~i~0#1|) (<= |~#commands~0.offset| 0))' at error location [2022-11-03 01:42:25,736 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:42:25,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:42:25,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2022-11-03 01:42:25,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900369978] [2022-11-03 01:42:25,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:42:25,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:42:25,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:42:25,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:42:25,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2022-11-03 01:42:25,738 INFO L87 Difference]: Start difference. First operand 459 states and 625 transitions. Second operand has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 01:42:25,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:25,792 INFO L93 Difference]: Finished difference Result 475 states and 636 transitions. [2022-11-03 01:42:25,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:42:25,795 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-11-03 01:42:25,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:25,797 INFO L225 Difference]: With dead ends: 475 [2022-11-03 01:42:25,797 INFO L226 Difference]: Without dead ends: 475 [2022-11-03 01:42:25,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 88 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:42:25,799 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 47 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:25,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 76 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:42:25,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-11-03 01:42:25,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 469. [2022-11-03 01:42:25,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 420 states have (on average 1.388095238095238) internal successors, (583), 448 states have internal predecessors, (583), 10 states have call successors, (10), 10 states have call predecessors, (10), 23 states have return successors, (37), 10 states have call predecessors, (37), 10 states have call successors, (37) [2022-11-03 01:42:25,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 630 transitions. [2022-11-03 01:42:25,815 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 630 transitions. Word has length 38 [2022-11-03 01:42:25,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:25,815 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 630 transitions. [2022-11-03 01:42:25,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 01:42:25,815 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 630 transitions. [2022-11-03 01:42:25,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-03 01:42:25,816 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:25,816 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:25,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:26,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:42:26,027 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:42:26,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:26,027 INFO L85 PathProgramCache]: Analyzing trace with hash -642426233, now seen corresponding path program 1 times [2022-11-03 01:42:26,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:42:26,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555640766] [2022-11-03 01:42:26,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:26,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:42:26,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:26,185 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:26,185 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:42:26,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555640766] [2022-11-03 01:42:26,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555640766] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:42:26,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267675742] [2022-11-03 01:42:26,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:26,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:42:26,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:42:26,187 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:42:26,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 01:42:26,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:26,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 01:42:26,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:26,298 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 01:42:26,348 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 01:42:26,349 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:42:26,359 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:26,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:42:26,514 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:26,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267675742] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:42:26,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [57145020] [2022-11-03 01:42:26,522 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-03 01:42:26,522 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:42:26,524 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:42:26,524 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:42:26,525 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:42:26,633 INFO L356 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-03 01:42:26,633 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2022-11-03 01:42:26,657 INFO L356 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-11-03 01:42:26,657 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 51 [2022-11-03 01:42:27,016 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 41 for LOIs [2022-11-03 01:42:27,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:27,194 INFO L356 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-11-03 01:42:27,194 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 61 [2022-11-03 01:42:27,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:27,229 INFO L356 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-11-03 01:42:27,230 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2022-11-03 01:42:27,394 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:42:32,471 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14098#(and (= |parse_input_c1_~x~0#1.offset| 0) (not (= ~global~0.base 0)) (= (select |#valid| |parse_input_~input#1.base|) 1) (not (= (select |#valid| ~global~0.base) 1)) (= 6 |~#commands~0.base|) (= |parse_input_#t~mem6#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4))) (not (= |parse_input_c1_~x~0#1.base| 0)) (= |parse_input_##fun~~TO~VOID_#in~#fp#1.base| |parse_input_#t~mem6#1.base|) (< |parse_input_~input#1.offset| (select |#length| |parse_input_~input#1.base|)) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (= (select |#valid| |parse_input_c1_~x~0#1.base|) 1) (= (select |#length| |parse_input_c1_~x~0#1.base|) 1) (<= 0 |parse_input_#in~input#1.offset|) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (< ~global~0.base |#StackHeapBarrier|) (= ~global~0.offset 0) (<= 0 (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) (<= 0 |~#commands~0.offset|) (= |parse_input_#t~mem6#1.offset| |parse_input_##fun~~TO~VOID_#in~#fp#1.offset|) (<= (select (select |#memory_int| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 8)) ~state~0) (= |parse_input_~i~0#1| 0) (<= |parse_input_#in~input#1.offset| 0) (= |parse_input_#t~mem6#1.offset| (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4))) (<= |parse_input_#in~input#1.base| 4) (not (= |parse_input_c1_~x~0#1.base| |parse_input_~input#1.base|)) (not (= |parse_input_c1_~x~0#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)))) (= |#NULL.offset| 0) (< (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)) (select |#length| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)))) (< |parse_input_c1_~x~0#1.base| |#StackHeapBarrier|) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (= (select |#valid| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) 1) (<= 0 |#StackHeapBarrier|) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 9) (select |#length| |~#commands~0.base|)) (or (not (= |parse_input_##fun~~TO~VOID_#in~#fp#1.offset| |#funAddr~c2.offset|)) (not (= |parse_input_##fun~~TO~VOID_#in~#fp#1.base| |#funAddr~c2.base|))) (<= |~#commands~0.offset| 0) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:42:32,471 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:42:32,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:42:32,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4] total 5 [2022-11-03 01:42:32,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399345967] [2022-11-03 01:42:32,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:42:32,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:42:32,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:42:32,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:42:32,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2022-11-03 01:42:32,473 INFO L87 Difference]: Start difference. First operand 469 states and 630 transitions. Second operand has 6 states, 5 states have (on average 11.0) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 01:42:32,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:32,522 INFO L93 Difference]: Finished difference Result 518 states and 693 transitions. [2022-11-03 01:42:32,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:42:32,523 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.0) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2022-11-03 01:42:32,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:32,525 INFO L225 Difference]: With dead ends: 518 [2022-11-03 01:42:32,526 INFO L226 Difference]: Without dead ends: 518 [2022-11-03 01:42:32,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2022-11-03 01:42:32,529 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 51 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:32,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 141 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 58 Unchecked, 0.0s Time] [2022-11-03 01:42:32,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2022-11-03 01:42:32,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 507. [2022-11-03 01:42:32,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 456 states have (on average 1.3771929824561404) internal successors, (628), 484 states have internal predecessors, (628), 11 states have call successors, (11), 11 states have call predecessors, (11), 24 states have return successors, (43), 11 states have call predecessors, (43), 11 states have call successors, (43) [2022-11-03 01:42:32,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 682 transitions. [2022-11-03 01:42:32,554 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 682 transitions. Word has length 39 [2022-11-03 01:42:32,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:32,554 INFO L495 AbstractCegarLoop]: Abstraction has 507 states and 682 transitions. [2022-11-03 01:42:32,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.0) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 01:42:32,554 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 682 transitions. [2022-11-03 01:42:32,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 01:42:32,555 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:32,555 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:32,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:32,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:42:32,781 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:42:32,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:32,782 INFO L85 PathProgramCache]: Analyzing trace with hash 693025532, now seen corresponding path program 1 times [2022-11-03 01:42:32,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:42:32,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421442776] [2022-11-03 01:42:32,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:32,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:42:32,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:32,901 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 01:42:32,901 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:42:32,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421442776] [2022-11-03 01:42:32,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421442776] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:42:32,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937539489] [2022-11-03 01:42:32,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:32,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:42:32,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:42:32,907 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:42:32,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 01:42:32,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:33,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:42:33,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:33,065 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 01:42:33,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:42:33,164 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 01:42:33,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937539489] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 01:42:33,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:42:33,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3, 2] total 6 [2022-11-03 01:42:33,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805565549] [2022-11-03 01:42:33,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:33,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:42:33,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:42:33,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:42:33,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:42:33,166 INFO L87 Difference]: Start difference. First operand 507 states and 682 transitions. Second operand has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 01:42:33,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:33,213 INFO L93 Difference]: Finished difference Result 619 states and 821 transitions. [2022-11-03 01:42:33,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:42:33,213 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-11-03 01:42:33,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:33,216 INFO L225 Difference]: With dead ends: 619 [2022-11-03 01:42:33,216 INFO L226 Difference]: Without dead ends: 619 [2022-11-03 01:42:33,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:42:33,217 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 74 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:33,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 128 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:42:33,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-11-03 01:42:33,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 596. [2022-11-03 01:42:33,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 538 states have (on average 1.3754646840148699) internal successors, (740), 569 states have internal predecessors, (740), 13 states have call successors, (13), 13 states have call predecessors, (13), 29 states have return successors, (51), 13 states have call predecessors, (51), 13 states have call successors, (51) [2022-11-03 01:42:33,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 804 transitions. [2022-11-03 01:42:33,235 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 804 transitions. Word has length 40 [2022-11-03 01:42:33,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:33,235 INFO L495 AbstractCegarLoop]: Abstraction has 596 states and 804 transitions. [2022-11-03 01:42:33,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 01:42:33,236 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 804 transitions. [2022-11-03 01:42:33,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 01:42:33,237 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:33,237 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:33,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:33,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-03 01:42:33,451 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:42:33,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:33,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1106991010, now seen corresponding path program 1 times [2022-11-03 01:42:33,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:42:33,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013577044] [2022-11-03 01:42:33,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:33,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:42:33,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:33,497 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 01:42:33,497 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:42:33,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013577044] [2022-11-03 01:42:33,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013577044] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:42:33,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:42:33,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:42:33,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114288285] [2022-11-03 01:42:33,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:33,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:42:33,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:42:33,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:42:33,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:42:33,500 INFO L87 Difference]: Start difference. First operand 596 states and 804 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 01:42:33,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:33,512 INFO L93 Difference]: Finished difference Result 423 states and 543 transitions. [2022-11-03 01:42:33,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:42:33,513 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-11-03 01:42:33,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:33,515 INFO L225 Difference]: With dead ends: 423 [2022-11-03 01:42:33,515 INFO L226 Difference]: Without dead ends: 423 [2022-11-03 01:42:33,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:42:33,517 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 4 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:33,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 94 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:42:33,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-11-03 01:42:33,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 402. [2022-11-03 01:42:33,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 363 states have (on average 1.325068870523416) internal successors, (481), 381 states have internal predecessors, (481), 10 states have call successors, (10), 10 states have call predecessors, (10), 18 states have return successors, (31), 10 states have call predecessors, (31), 10 states have call successors, (31) [2022-11-03 01:42:33,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 522 transitions. [2022-11-03 01:42:33,532 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 522 transitions. Word has length 44 [2022-11-03 01:42:33,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:33,532 INFO L495 AbstractCegarLoop]: Abstraction has 402 states and 522 transitions. [2022-11-03 01:42:33,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 01:42:33,533 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 522 transitions. [2022-11-03 01:42:33,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-03 01:42:33,533 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:33,534 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:33,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-03 01:42:33,534 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:42:33,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:33,535 INFO L85 PathProgramCache]: Analyzing trace with hash 78578931, now seen corresponding path program 1 times [2022-11-03 01:42:33,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:42:33,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463743242] [2022-11-03 01:42:33,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:33,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:42:33,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:33,638 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:33,639 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:42:33,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463743242] [2022-11-03 01:42:33,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463743242] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:42:33,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827151692] [2022-11-03 01:42:33,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:33,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:42:33,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:42:33,641 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:42:33,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 01:42:33,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:33,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:42:33,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:33,774 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:33,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:42:33,874 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:33,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827151692] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:42:33,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1652071018] [2022-11-03 01:42:33,876 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-03 01:42:33,876 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:42:33,876 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:42:33,876 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:42:33,877 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:42:33,973 INFO L356 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-03 01:42:33,973 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2022-11-03 01:42:33,990 INFO L356 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-11-03 01:42:33,990 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 51 [2022-11-03 01:42:34,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:34,363 INFO L356 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2022-11-03 01:42:34,363 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 723 treesize of output 699 [2022-11-03 01:42:34,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:34,386 INFO L356 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2022-11-03 01:42:34,387 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 699 treesize of output 675 [2022-11-03 01:42:34,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:34,671 INFO L356 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2022-11-03 01:42:34,672 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 723 treesize of output 699 [2022-11-03 01:42:34,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:34,711 INFO L356 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2022-11-03 01:42:34,712 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 699 treesize of output 675 [2022-11-03 01:42:35,022 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 42 for LOIs [2022-11-03 01:42:35,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:35,206 INFO L356 Elim1Store]: treesize reduction 46, result has 62.3 percent of original size [2022-11-03 01:42:35,207 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 103 [2022-11-03 01:42:35,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:35,369 INFO L356 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-11-03 01:42:35,369 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 61 [2022-11-03 01:42:35,482 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:42:40,168 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17701#(and (= 6 |~#commands~0.base|) (<= 0 ~global~0.offset) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (<= 0 |parse_input_#in~input#1.offset|) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (<= 0 |~#commands~0.offset|) (= |parse_input_~i~0#1| 0) (<= |parse_input_#in~input#1.offset| 0) (<= ~global~0.offset 0) (not (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|))) (= |#NULL.offset| 0) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (<= |~#commands~0.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-03 01:42:40,169 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:42:40,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:42:40,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2022-11-03 01:42:40,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350931155] [2022-11-03 01:42:40,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:42:40,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:42:40,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:42:40,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:42:40,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2022-11-03 01:42:40,171 INFO L87 Difference]: Start difference. First operand 402 states and 522 transitions. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 01:42:40,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:40,328 INFO L93 Difference]: Finished difference Result 410 states and 515 transitions. [2022-11-03 01:42:40,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 01:42:40,329 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-11-03 01:42:40,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:40,331 INFO L225 Difference]: With dead ends: 410 [2022-11-03 01:42:40,331 INFO L226 Difference]: Without dead ends: 410 [2022-11-03 01:42:40,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 114 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2022-11-03 01:42:40,332 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 90 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:40,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 209 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:42:40,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-11-03 01:42:40,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 392. [2022-11-03 01:42:40,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 355 states have (on average 1.3126760563380282) internal successors, (466), 371 states have internal predecessors, (466), 10 states have call successors, (10), 10 states have call predecessors, (10), 16 states have return successors, (23), 10 states have call predecessors, (23), 10 states have call successors, (23) [2022-11-03 01:42:40,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 499 transitions. [2022-11-03 01:42:40,345 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 499 transitions. Word has length 45 [2022-11-03 01:42:40,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:40,346 INFO L495 AbstractCegarLoop]: Abstraction has 392 states and 499 transitions. [2022-11-03 01:42:40,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 01:42:40,346 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 499 transitions. [2022-11-03 01:42:40,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-03 01:42:40,347 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:40,347 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:40,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:40,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:42:40,563 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:42:40,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:40,563 INFO L85 PathProgramCache]: Analyzing trace with hash 16349608, now seen corresponding path program 1 times [2022-11-03 01:42:40,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:42:40,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399283794] [2022-11-03 01:42:40,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:40,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:42:40,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:40,953 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 01:42:40,953 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:42:40,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399283794] [2022-11-03 01:42:40,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399283794] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:42:40,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359055558] [2022-11-03 01:42:40,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:40,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:42:40,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:42:40,955 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:42:40,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-03 01:42:41,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:41,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 01:42:41,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:41,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:41,508 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:42:41,586 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 01:42:41,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:42:43,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359055558] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:42:43,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [984045765] [2022-11-03 01:42:43,737 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-03 01:42:43,737 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:42:43,737 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:42:43,738 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:42:43,738 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:42:43,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:43,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:43,962 INFO L356 Elim1Store]: treesize reduction 165, result has 19.9 percent of original size [2022-11-03 01:42:43,963 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 196 treesize of output 210 [2022-11-03 01:42:44,062 INFO L356 Elim1Store]: treesize reduction 205, result has 30.0 percent of original size [2022-11-03 01:42:44,062 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 185 treesize of output 234 [2022-11-03 01:42:44,495 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 35 for LOIs [2022-11-03 01:42:44,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:44,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:44,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:44,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:44,670 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-03 01:42:44,670 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2022-11-03 01:42:44,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:44,732 INFO L356 Elim1Store]: treesize reduction 70, result has 28.6 percent of original size [2022-11-03 01:42:44,732 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 27 treesize of output 45 [2022-11-03 01:42:44,892 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:42:47,658 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18703#(and (<= |parse_input_~input#1.offset| 0) (= 6 |~#commands~0.base|) (<= 3 |parse_input_~input#1.base|) (<= |#NULL.offset| 0) (<= 0 |parse_input_~input#1.offset|) (<= 0 |parse_input_#in~input#1.offset|) (<= 0 |~#commands~0.offset|) (<= |parse_input_#in~input#1.offset| 0) (not (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|))) (<= |parse_input_~input#1.base| 5) (< |parse_input_~i~0#1| 2) (<= 3 |parse_input_#in~input#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (<= 0 |parse_input_~i~0#1|) (<= |~#commands~0.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-03 01:42:47,658 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:42:47,658 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:42:47,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 13 [2022-11-03 01:42:47,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408160512] [2022-11-03 01:42:47,658 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:42:47,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-03 01:42:47,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:42:47,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-03 01:42:47,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1015, Unknown=0, NotChecked=0, Total=1190 [2022-11-03 01:42:47,660 INFO L87 Difference]: Start difference. First operand 392 states and 499 transitions. Second operand has 15 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-03 01:42:48,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:48,398 INFO L93 Difference]: Finished difference Result 471 states and 572 transitions. [2022-11-03 01:42:48,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-03 01:42:48,398 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 46 [2022-11-03 01:42:48,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:48,401 INFO L225 Difference]: With dead ends: 471 [2022-11-03 01:42:48,401 INFO L226 Difference]: Without dead ends: 471 [2022-11-03 01:42:48,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 66 SyntacticMatches, 8 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=360, Invalid=1992, Unknown=0, NotChecked=0, Total=2352 [2022-11-03 01:42:48,403 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 344 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:48,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 256 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 240 Invalid, 0 Unknown, 65 Unchecked, 0.2s Time] [2022-11-03 01:42:48,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-11-03 01:42:48,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 437. [2022-11-03 01:42:48,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 397 states have (on average 1.3123425692695214) internal successors, (521), 414 states have internal predecessors, (521), 11 states have call successors, (11), 11 states have call predecessors, (11), 18 states have return successors, (24), 11 states have call predecessors, (24), 11 states have call successors, (24) [2022-11-03 01:42:48,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 556 transitions. [2022-11-03 01:42:48,416 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 556 transitions. Word has length 46 [2022-11-03 01:42:48,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:48,416 INFO L495 AbstractCegarLoop]: Abstraction has 437 states and 556 transitions. [2022-11-03 01:42:48,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-03 01:42:48,417 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 556 transitions. [2022-11-03 01:42:48,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-03 01:42:48,418 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:48,418 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:48,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:48,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:42:48,631 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:42:48,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:48,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1705702260, now seen corresponding path program 1 times [2022-11-03 01:42:48,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:42:48,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563810413] [2022-11-03 01:42:48,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:48,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:42:48,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:48,713 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 01:42:48,713 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:42:48,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563810413] [2022-11-03 01:42:48,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563810413] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:42:48,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804232411] [2022-11-03 01:42:48,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:48,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:42:48,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:42:48,716 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:42:48,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-03 01:42:48,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:48,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:42:48,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:48,865 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 01:42:48,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:42:48,931 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 01:42:48,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804232411] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:42:48,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [49135191] [2022-11-03 01:42:48,933 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-03 01:42:48,934 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:42:48,934 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:42:48,934 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:42:48,934 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:42:49,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:49,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:49,159 INFO L356 Elim1Store]: treesize reduction 165, result has 19.9 percent of original size [2022-11-03 01:42:49,159 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 196 treesize of output 210 [2022-11-03 01:42:49,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:49,267 INFO L356 Elim1Store]: treesize reduction 187, result has 29.7 percent of original size [2022-11-03 01:42:49,267 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 185 treesize of output 230 [2022-11-03 01:42:49,832 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 187 for LOIs [2022-11-03 01:42:50,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:50,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:50,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:50,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:50,284 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-03 01:42:50,285 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2022-11-03 01:42:50,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:50,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:50,341 INFO L356 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2022-11-03 01:42:50,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 41 [2022-11-03 01:42:50,544 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:42:53,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [49135191] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:42:53,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:42:53,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [3, 3, 3] total 21 [2022-11-03 01:42:53,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101699263] [2022-11-03 01:42:53,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:53,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 01:42:53,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:42:53,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 01:42:53,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2022-11-03 01:42:53,762 INFO L87 Difference]: Start difference. First operand 437 states and 556 transitions. Second operand has 20 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 01:43:03,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:03,844 INFO L93 Difference]: Finished difference Result 472 states and 581 transitions. [2022-11-03 01:43:03,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:43:03,845 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-11-03 01:43:03,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:03,846 INFO L225 Difference]: With dead ends: 472 [2022-11-03 01:43:03,847 INFO L226 Difference]: Without dead ends: 472 [2022-11-03 01:43:03,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 111 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=304, Invalid=1102, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 01:43:03,848 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 109 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:03,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 216 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-03 01:43:03,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-11-03 01:43:03,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 325. [2022-11-03 01:43:03,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 293 states have (on average 1.3139931740614335) internal successors, (385), 308 states have internal predecessors, (385), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-03 01:43:03,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 409 transitions. [2022-11-03 01:43:03,872 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 409 transitions. Word has length 45 [2022-11-03 01:43:03,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:03,872 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 409 transitions. [2022-11-03 01:43:03,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 01:43:03,874 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 409 transitions. [2022-11-03 01:43:03,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-03 01:43:03,874 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:03,875 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:03,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:04,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-03 01:43:04,095 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:43:04,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:04,095 INFO L85 PathProgramCache]: Analyzing trace with hash 2087117614, now seen corresponding path program 1 times [2022-11-03 01:43:04,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:04,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269464535] [2022-11-03 01:43:04,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:04,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:04,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:04,412 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:04,412 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:04,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269464535] [2022-11-03 01:43:04,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269464535] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:43:04,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481503460] [2022-11-03 01:43:04,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:04,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:04,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:43:04,414 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:43:04,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-03 01:43:04,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:04,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 01:43:04,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:04,647 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 01:43:04,648 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-03 01:43:04,761 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 01:43:04,762 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:43:04,804 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 01:43:04,804 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:43:04,879 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:04,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:04,935 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-03 01:43:04,935 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 53 [2022-11-03 01:43:05,144 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-03 01:43:05,145 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 105 [2022-11-03 01:43:05,371 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:05,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481503460] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:43:05,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [797396701] [2022-11-03 01:43:05,373 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-03 01:43:05,373 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:43:05,373 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:43:05,373 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:43:05,374 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:43:05,493 INFO L356 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-03 01:43:05,494 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2022-11-03 01:43:05,516 INFO L356 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-11-03 01:43:05,516 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 51 [2022-11-03 01:43:05,614 INFO L356 Elim1Store]: treesize reduction 136, result has 28.0 percent of original size [2022-11-03 01:43:05,615 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 case distinctions, treesize of input 40 treesize of output 73 [2022-11-03 01:43:05,959 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2022-11-03 01:43:06,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:06,058 INFO L356 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-11-03 01:43:06,058 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 61 [2022-11-03 01:43:06,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:06,080 INFO L356 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-11-03 01:43:06,081 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2022-11-03 01:43:06,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:06,208 INFO L356 Elim1Store]: treesize reduction 128, result has 29.3 percent of original size [2022-11-03 01:43:06,208 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 40 treesize of output 73 [2022-11-03 01:43:06,295 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:43:09,541 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21080#(and (= 6 |~#commands~0.base|) (<= 0 ~global~0.offset) (not (= (select |#valid| |~#commands~0.base|) 1)) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (= |~#commands~0.offset| 0) (= |parse_input_~i~0#1| 0) (<= ~global~0.offset 0) (= |#NULL.offset| 0) (= |parse_input_#in~input#1.offset| 0) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (= |#NULL.base| 0))' at error location [2022-11-03 01:43:09,541 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:43:09,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:43:09,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 10] total 25 [2022-11-03 01:43:09,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778951267] [2022-11-03 01:43:09,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:43:09,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-03 01:43:09,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:09,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-03 01:43:09,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=1674, Unknown=0, NotChecked=0, Total=1980 [2022-11-03 01:43:09,544 INFO L87 Difference]: Start difference. First operand 325 states and 409 transitions. Second operand has 26 states, 23 states have (on average 5.478260869565218) internal successors, (126), 25 states have internal predecessors, (126), 6 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-03 01:43:09,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:09,851 INFO L93 Difference]: Finished difference Result 330 states and 413 transitions. [2022-11-03 01:43:09,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:43:09,852 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 5.478260869565218) internal successors, (126), 25 states have internal predecessors, (126), 6 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 48 [2022-11-03 01:43:09,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:09,853 INFO L225 Difference]: With dead ends: 330 [2022-11-03 01:43:09,854 INFO L226 Difference]: Without dead ends: 330 [2022-11-03 01:43:09,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=392, Invalid=1960, Unknown=0, NotChecked=0, Total=2352 [2022-11-03 01:43:09,855 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 406 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:09,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 132 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:43:09,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-11-03 01:43:09,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 324. [2022-11-03 01:43:09,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 293 states have (on average 1.3071672354948805) internal successors, (383), 307 states have internal predecessors, (383), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-03 01:43:09,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 407 transitions. [2022-11-03 01:43:09,864 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 407 transitions. Word has length 48 [2022-11-03 01:43:09,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:09,864 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 407 transitions. [2022-11-03 01:43:09,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 5.478260869565218) internal successors, (126), 25 states have internal predecessors, (126), 6 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-03 01:43:09,865 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 407 transitions. [2022-11-03 01:43:09,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-03 01:43:09,865 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:09,865 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:09,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:10,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-03 01:43:10,091 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:43:10,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:10,091 INFO L85 PathProgramCache]: Analyzing trace with hash 2087117615, now seen corresponding path program 1 times [2022-11-03 01:43:10,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:10,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781395120] [2022-11-03 01:43:10,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:10,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:10,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:10,326 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:43:10,326 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:10,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781395120] [2022-11-03 01:43:10,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781395120] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:10,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:10,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:43:10,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984612580] [2022-11-03 01:43:10,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:10,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 01:43:10,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:10,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 01:43:10,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:43:10,330 INFO L87 Difference]: Start difference. First operand 324 states and 407 transitions. Second operand has 11 states, 9 states have (on average 4.777777777777778) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 01:43:10,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:10,603 INFO L93 Difference]: Finished difference Result 407 states and 492 transitions. [2022-11-03 01:43:10,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 01:43:10,604 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 4.777777777777778) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2022-11-03 01:43:10,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:10,605 INFO L225 Difference]: With dead ends: 407 [2022-11-03 01:43:10,606 INFO L226 Difference]: Without dead ends: 407 [2022-11-03 01:43:10,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:43:10,606 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 318 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:10,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 108 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:43:10,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-11-03 01:43:10,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 324. [2022-11-03 01:43:10,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 293 states have (on average 1.2969283276450512) internal successors, (380), 307 states have internal predecessors, (380), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-03 01:43:10,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 404 transitions. [2022-11-03 01:43:10,615 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 404 transitions. Word has length 48 [2022-11-03 01:43:10,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:10,616 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 404 transitions. [2022-11-03 01:43:10,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 4.777777777777778) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 01:43:10,616 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 404 transitions. [2022-11-03 01:43:10,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-03 01:43:10,617 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:10,617 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:10,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-03 01:43:10,617 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:43:10,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:10,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1739820872, now seen corresponding path program 1 times [2022-11-03 01:43:10,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:10,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790539608] [2022-11-03 01:43:10,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:10,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:10,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:10,829 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 01:43:10,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:10,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790539608] [2022-11-03 01:43:10,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790539608] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:43:10,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285769089] [2022-11-03 01:43:10,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:10,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:10,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:43:10,833 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:43:10,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-03 01:43:10,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:10,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 01:43:10,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:11,044 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 01:43:11,044 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:43:11,077 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 01:43:11,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:11,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285769089] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:43:11,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1841594528] [2022-11-03 01:43:11,135 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-03 01:43:11,135 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:43:11,136 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:43:11,137 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:43:11,137 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:43:11,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:11,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:11,409 INFO L356 Elim1Store]: treesize reduction 165, result has 19.9 percent of original size [2022-11-03 01:43:11,409 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 196 treesize of output 210 [2022-11-03 01:43:11,512 INFO L356 Elim1Store]: treesize reduction 205, result has 30.0 percent of original size [2022-11-03 01:43:11,512 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 185 treesize of output 234 [2022-11-03 01:43:11,871 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 35 for LOIs [2022-11-03 01:43:12,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:12,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:12,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:12,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:12,181 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-03 01:43:12,181 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2022-11-03 01:43:12,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:12,239 INFO L356 Elim1Store]: treesize reduction 70, result has 28.6 percent of original size [2022-11-03 01:43:12,239 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 27 treesize of output 45 [2022-11-03 01:43:12,406 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:43:15,273 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22703#(and (<= |parse_input_~input#1.offset| 0) (<= 0 |#NULL.base|) (<= 6 |~#commands~0.base|) (not (= (select |#valid| |parse_input_~input#1.base|) 1)) (<= 3 |parse_input_~input#1.base|) (< |parse_input_#t~mem3#1.offset| (select |#length| |parse_input_#t~mem3#1.base|)) (<= |#NULL.offset| 0) (<= 0 |parse_input_~input#1.offset|) (<= |~#commands~0.base| 6) (<= 0 |parse_input_#in~input#1.offset|) (<= 0 |parse_input_#t~mem3#1.offset|) (<= 0 |~#commands~0.offset|) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (<= |parse_input_#in~input#1.offset| 0) (<= |#NULL.base| 0) (<= |parse_input_~input#1.base| 5) (<= 3 |parse_input_#in~input#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (<= 0 |parse_input_~i~0#1|) (<= |~#commands~0.offset| 0))' at error location [2022-11-03 01:43:15,273 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:43:15,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:43:15,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2022-11-03 01:43:15,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061860107] [2022-11-03 01:43:15,274 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:43:15,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:43:15,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:15,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:43:15,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:43:15,275 INFO L87 Difference]: Start difference. First operand 324 states and 404 transitions. Second operand has 10 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 1 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:43:15,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:15,578 INFO L93 Difference]: Finished difference Result 340 states and 410 transitions. [2022-11-03 01:43:15,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 01:43:15,579 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 1 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2022-11-03 01:43:15,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:15,580 INFO L225 Difference]: With dead ends: 340 [2022-11-03 01:43:15,580 INFO L226 Difference]: Without dead ends: 340 [2022-11-03 01:43:15,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 79 SyntacticMatches, 9 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=204, Invalid=1202, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 01:43:15,581 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 165 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:15,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 211 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 156 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-11-03 01:43:15,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-11-03 01:43:15,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 324. [2022-11-03 01:43:15,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 293 states have (on average 1.2901023890784984) internal successors, (378), 307 states have internal predecessors, (378), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-03 01:43:15,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 402 transitions. [2022-11-03 01:43:15,589 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 402 transitions. Word has length 49 [2022-11-03 01:43:15,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:15,589 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 402 transitions. [2022-11-03 01:43:15,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 1 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:43:15,590 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 402 transitions. [2022-11-03 01:43:15,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-03 01:43:15,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:15,590 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:15,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:15,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-03 01:43:15,811 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:43:15,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:15,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1702316402, now seen corresponding path program 2 times [2022-11-03 01:43:15,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:15,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842284197] [2022-11-03 01:43:15,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:15,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:15,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:16,015 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 01:43:16,016 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:16,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842284197] [2022-11-03 01:43:16,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842284197] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:43:16,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795412445] [2022-11-03 01:43:16,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:43:16,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:16,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:43:16,018 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:43:16,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-03 01:43:16,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-03 01:43:16,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:43:16,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 01:43:16,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:16,209 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 01:43:16,210 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:43:16,270 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 01:43:16,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:16,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795412445] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:43:16,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2112065053] [2022-11-03 01:43:16,429 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-03 01:43:16,430 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:43:16,430 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:43:16,430 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:43:16,430 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:43:16,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:16,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:16,696 INFO L356 Elim1Store]: treesize reduction 165, result has 19.9 percent of original size [2022-11-03 01:43:16,697 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 196 treesize of output 210 [2022-11-03 01:43:16,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:16,792 INFO L356 Elim1Store]: treesize reduction 187, result has 29.7 percent of original size [2022-11-03 01:43:16,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 185 treesize of output 230 [2022-11-03 01:43:17,162 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 35 for LOIs [2022-11-03 01:43:17,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:17,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:17,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:17,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:17,344 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-03 01:43:17,345 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2022-11-03 01:43:17,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:17,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:17,391 INFO L356 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2022-11-03 01:43:17,391 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 41 [2022-11-03 01:43:17,505 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:43:19,754 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23648#(and (<= |parse_input_~input#1.offset| 0) (= 6 |~#commands~0.base|) (not (= (select |#valid| |parse_input_~input#1.base|) 1)) (<= 3 |parse_input_~input#1.base|) (< |parse_input_#t~mem3#1.offset| (select |#length| |parse_input_#t~mem3#1.base|)) (<= 0 |parse_input_~input#1.offset|) (<= 0 |parse_input_#t~mem3#1.offset|) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (= |~#commands~0.offset| 0) (<= |parse_input_~input#1.base| 5) (= |#NULL.offset| 0) (= |parse_input_#in~input#1.offset| 0) (<= 3 |parse_input_#in~input#1.base|) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (<= 0 |parse_input_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-03 01:43:19,754 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:43:19,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:43:19,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 9 [2022-11-03 01:43:19,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085886201] [2022-11-03 01:43:19,755 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:43:19,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 01:43:19,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:19,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 01:43:19,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2022-11-03 01:43:19,756 INFO L87 Difference]: Start difference. First operand 324 states and 402 transitions. Second operand has 11 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 1 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 01:43:20,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:20,051 INFO L93 Difference]: Finished difference Result 335 states and 409 transitions. [2022-11-03 01:43:20,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 01:43:20,052 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 1 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2022-11-03 01:43:20,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:20,054 INFO L225 Difference]: With dead ends: 335 [2022-11-03 01:43:20,054 INFO L226 Difference]: Without dead ends: 335 [2022-11-03 01:43:20,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 97 SyntacticMatches, 10 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=235, Invalid=1325, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 01:43:20,055 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 151 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:20,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 208 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 148 Invalid, 0 Unknown, 25 Unchecked, 0.1s Time] [2022-11-03 01:43:20,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-11-03 01:43:20,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 324. [2022-11-03 01:43:20,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 293 states have (on average 1.286689419795222) internal successors, (377), 307 states have internal predecessors, (377), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-03 01:43:20,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 401 transitions. [2022-11-03 01:43:20,063 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 401 transitions. Word has length 49 [2022-11-03 01:43:20,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:20,063 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 401 transitions. [2022-11-03 01:43:20,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 1 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 01:43:20,064 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 401 transitions. [2022-11-03 01:43:20,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-03 01:43:20,065 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:20,065 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:20,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:20,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:20,279 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:43:20,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:20,279 INFO L85 PathProgramCache]: Analyzing trace with hash 276136575, now seen corresponding path program 1 times [2022-11-03 01:43:20,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:20,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817114864] [2022-11-03 01:43:20,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:20,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:20,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:21,130 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:21,130 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:21,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817114864] [2022-11-03 01:43:21,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817114864] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:43:21,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525284723] [2022-11-03 01:43:21,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:21,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:21,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:43:21,132 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:43:21,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-03 01:43:21,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:21,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 01:43:21,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:21,485 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 01:43:21,486 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-03 01:43:21,771 INFO L356 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2022-11-03 01:43:21,771 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 01:43:21,839 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 01:43:21,839 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 26 [2022-11-03 01:43:22,010 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 01:43:22,036 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:22,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:22,154 INFO L356 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-03 01:43:22,154 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 178 treesize of output 165 [2022-11-03 01:43:22,447 INFO L356 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2022-11-03 01:43:22,448 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 101 [2022-11-03 01:43:22,826 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:22,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525284723] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:43:22,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [31025542] [2022-11-03 01:43:22,829 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-03 01:43:22,829 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:43:22,830 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:43:22,830 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:43:22,830 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:43:22,942 INFO L356 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-03 01:43:22,942 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2022-11-03 01:43:22,963 INFO L356 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-11-03 01:43:22,964 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 51 [2022-11-03 01:43:23,101 INFO L356 Elim1Store]: treesize reduction 136, result has 28.0 percent of original size [2022-11-03 01:43:23,102 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 case distinctions, treesize of input 40 treesize of output 73 [2022-11-03 01:43:23,415 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2022-11-03 01:43:23,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:23,509 INFO L356 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-11-03 01:43:23,509 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 61 [2022-11-03 01:43:23,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:23,529 INFO L356 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-11-03 01:43:23,529 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2022-11-03 01:43:23,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:23,662 INFO L356 Elim1Store]: treesize reduction 128, result has 29.3 percent of original size [2022-11-03 01:43:23,663 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 40 treesize of output 73 [2022-11-03 01:43:23,738 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:43:27,597 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24674#(and (= 6 |~#commands~0.base|) (<= 0 ~global~0.offset) (= (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)) |parse_input_#t~mem3#1.offset|) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|)) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (= |~#commands~0.offset| 0) (= |parse_input_#t~mem3#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) (= |parse_input_~i~0#1| 0) (<= ~global~0.offset 0) (= |#NULL.offset| 0) (= |parse_input_#in~input#1.offset| 0) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (not (= (select |#valid| |parse_input_#t~mem3#1.base|) 1)) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:43:27,598 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:43:27,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:43:27,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 14] total 42 [2022-11-03 01:43:27,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054861582] [2022-11-03 01:43:27,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:43:27,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-03 01:43:27,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:27,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-03 01:43:27,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=464, Invalid=3318, Unknown=0, NotChecked=0, Total=3782 [2022-11-03 01:43:27,601 INFO L87 Difference]: Start difference. First operand 324 states and 401 transitions. Second operand has 43 states, 37 states have (on average 3.5405405405405403) internal successors, (131), 35 states have internal predecessors, (131), 8 states have call successors, (9), 9 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-03 01:43:29,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:29,407 INFO L93 Difference]: Finished difference Result 403 states and 485 transitions. [2022-11-03 01:43:29,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 01:43:29,407 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 37 states have (on average 3.5405405405405403) internal successors, (131), 35 states have internal predecessors, (131), 8 states have call successors, (9), 9 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 49 [2022-11-03 01:43:29,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:29,409 INFO L225 Difference]: With dead ends: 403 [2022-11-03 01:43:29,409 INFO L226 Difference]: Without dead ends: 403 [2022-11-03 01:43:29,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 103 SyntacticMatches, 14 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2308 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=845, Invalid=4705, Unknown=0, NotChecked=0, Total=5550 [2022-11-03 01:43:29,411 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 581 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:29,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [581 Valid, 312 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 626 Invalid, 0 Unknown, 15 Unchecked, 0.5s Time] [2022-11-03 01:43:29,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-11-03 01:43:29,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 324. [2022-11-03 01:43:29,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 293 states have (on average 1.2798634812286689) internal successors, (375), 307 states have internal predecessors, (375), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-03 01:43:29,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 399 transitions. [2022-11-03 01:43:29,419 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 399 transitions. Word has length 49 [2022-11-03 01:43:29,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:29,420 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 399 transitions. [2022-11-03 01:43:29,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 37 states have (on average 3.5405405405405403) internal successors, (131), 35 states have internal predecessors, (131), 8 states have call successors, (9), 9 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-03 01:43:29,420 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 399 transitions. [2022-11-03 01:43:29,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-03 01:43:29,421 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:29,421 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:29,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-11-03 01:43:29,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:29,647 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:43:29,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:29,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1900127767, now seen corresponding path program 1 times [2022-11-03 01:43:29,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:29,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963474640] [2022-11-03 01:43:29,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:29,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:29,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:29,946 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 01:43:29,946 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:29,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963474640] [2022-11-03 01:43:29,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963474640] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:43:29,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331461285] [2022-11-03 01:43:29,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:29,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:29,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:43:29,951 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:43:29,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-03 01:43:30,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:30,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 01:43:30,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:30,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:30,305 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:43:30,395 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 01:43:30,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:30,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331461285] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:43:30,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1576190704] [2022-11-03 01:43:30,531 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-03 01:43:30,531 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:43:30,531 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:43:30,531 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:43:30,532 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:43:30,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:30,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:30,783 INFO L356 Elim1Store]: treesize reduction 165, result has 19.9 percent of original size [2022-11-03 01:43:30,783 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 196 treesize of output 210 [2022-11-03 01:43:30,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:30,886 INFO L356 Elim1Store]: treesize reduction 187, result has 29.7 percent of original size [2022-11-03 01:43:30,886 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 185 treesize of output 230 [2022-11-03 01:43:31,237 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 35 for LOIs [2022-11-03 01:43:31,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:31,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:31,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:31,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:31,527 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-03 01:43:31,530 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2022-11-03 01:43:31,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:31,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:31,582 INFO L356 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2022-11-03 01:43:31,582 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 41 [2022-11-03 01:43:31,749 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:43:34,829 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25652#(and (<= |parse_input_~input#1.offset| 0) (<= 0 |#NULL.base|) (<= (select |#length| |parse_input_~input#1.base|) |parse_input_~input#1.offset|) (= (select |#valid| |parse_input_~input#1.base|) 1) (<= 6 |~#commands~0.base|) (<= 3 |parse_input_~input#1.base|) (< |parse_input_#t~mem3#1.offset| (select |#length| |parse_input_#t~mem3#1.base|)) (<= |#NULL.offset| 0) (<= 0 |parse_input_~input#1.offset|) (<= |~#commands~0.base| 6) (<= 0 |parse_input_#in~input#1.offset|) (<= 0 |parse_input_#t~mem3#1.offset|) (<= 0 |~#commands~0.offset|) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (<= |parse_input_#in~input#1.offset| 0) (<= |#NULL.base| 0) (<= |parse_input_~input#1.base| 5) (<= 3 |parse_input_#in~input#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (<= 0 |parse_input_~i~0#1|) (<= |~#commands~0.offset| 0))' at error location [2022-11-03 01:43:34,829 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:43:34,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:43:34,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 13 [2022-11-03 01:43:34,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867157229] [2022-11-03 01:43:34,830 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:43:34,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-03 01:43:34,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:34,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-03 01:43:34,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1099, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 01:43:34,831 INFO L87 Difference]: Start difference. First operand 324 states and 399 transitions. Second operand has 15 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 01:43:35,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:35,272 INFO L93 Difference]: Finished difference Result 339 states and 401 transitions. [2022-11-03 01:43:35,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 01:43:35,273 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2022-11-03 01:43:35,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:35,274 INFO L225 Difference]: With dead ends: 339 [2022-11-03 01:43:35,274 INFO L226 Difference]: Without dead ends: 339 [2022-11-03 01:43:35,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 75 SyntacticMatches, 9 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=271, Invalid=1621, Unknown=0, NotChecked=0, Total=1892 [2022-11-03 01:43:35,276 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 249 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:35,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 228 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 227 Invalid, 0 Unknown, 61 Unchecked, 0.2s Time] [2022-11-03 01:43:35,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-11-03 01:43:35,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 324. [2022-11-03 01:43:35,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 293 states have (on average 1.2593856655290103) internal successors, (369), 307 states have internal predecessors, (369), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-03 01:43:35,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 393 transitions. [2022-11-03 01:43:35,283 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 393 transitions. Word has length 50 [2022-11-03 01:43:35,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:35,284 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 393 transitions. [2022-11-03 01:43:35,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 01:43:35,284 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 393 transitions. [2022-11-03 01:43:35,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-03 01:43:35,285 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:35,285 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:35,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:35,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-03 01:43:35,503 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:43:35,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:35,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1232200959, now seen corresponding path program 2 times [2022-11-03 01:43:35,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:35,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861626036] [2022-11-03 01:43:35,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:35,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:35,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:35,784 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 37 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 01:43:35,784 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:35,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861626036] [2022-11-03 01:43:35,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861626036] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:43:35,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373113683] [2022-11-03 01:43:35,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:43:35,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:35,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:43:35,786 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:43:35,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-03 01:43:35,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-03 01:43:35,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:43:35,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 01:43:35,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:35,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:35,999 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:43:36,110 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 01:43:36,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:36,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373113683] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:43:36,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [300662360] [2022-11-03 01:43:36,341 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-03 01:43:36,341 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:43:36,341 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:43:36,341 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:43:36,341 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:43:36,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:36,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:36,601 INFO L356 Elim1Store]: treesize reduction 148, result has 13.5 percent of original size [2022-11-03 01:43:36,602 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 183 treesize of output 182 [2022-11-03 01:43:36,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:36,688 INFO L356 Elim1Store]: treesize reduction 174, result has 23.0 percent of original size [2022-11-03 01:43:36,688 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 183 treesize of output 206 [2022-11-03 01:43:36,982 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 35 for LOIs [2022-11-03 01:43:37,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:37,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:37,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:37,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:37,174 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-03 01:43:37,175 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2022-11-03 01:43:37,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:37,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:37,228 INFO L356 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2022-11-03 01:43:37,228 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 41 [2022-11-03 01:43:37,354 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:43:39,797 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26608#(and (<= |parse_input_~input#1.offset| 0) (<= (select |#length| |parse_input_~input#1.base|) |parse_input_~input#1.offset|) (= (select |#valid| |parse_input_~input#1.base|) 1) (= 6 |~#commands~0.base|) (<= 3 |parse_input_~input#1.base|) (< |parse_input_#t~mem3#1.offset| (select |#length| |parse_input_#t~mem3#1.base|)) (<= 0 |parse_input_~input#1.offset|) (<= 0 |parse_input_#t~mem3#1.offset|) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (= |~#commands~0.offset| 0) (<= |parse_input_~input#1.base| 5) (= |#NULL.offset| 0) (= |parse_input_#in~input#1.offset| 0) (<= 3 |parse_input_#in~input#1.base|) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (<= 0 |parse_input_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-03 01:43:39,797 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:43:39,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:43:39,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2022-11-03 01:43:39,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185249418] [2022-11-03 01:43:39,798 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:43:39,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 01:43:39,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:39,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 01:43:39,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1296, Unknown=0, NotChecked=0, Total=1482 [2022-11-03 01:43:39,799 INFO L87 Difference]: Start difference. First operand 324 states and 393 transitions. Second operand has 17 states, 12 states have (on average 6.166666666666667) internal successors, (74), 12 states have internal predecessors, (74), 4 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-03 01:43:40,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:40,257 INFO L93 Difference]: Finished difference Result 333 states and 399 transitions. [2022-11-03 01:43:40,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 01:43:40,257 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 12 states have (on average 6.166666666666667) internal successors, (74), 12 states have internal predecessors, (74), 4 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 50 [2022-11-03 01:43:40,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:40,259 INFO L225 Difference]: With dead ends: 333 [2022-11-03 01:43:40,259 INFO L226 Difference]: Without dead ends: 333 [2022-11-03 01:43:40,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 92 SyntacticMatches, 10 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=331, Invalid=1925, Unknown=0, NotChecked=0, Total=2256 [2022-11-03 01:43:40,260 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 243 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:40,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 294 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 295 Invalid, 0 Unknown, 57 Unchecked, 0.2s Time] [2022-11-03 01:43:40,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-11-03 01:43:40,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 324. [2022-11-03 01:43:40,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 293 states have (on average 1.2525597269624573) internal successors, (367), 307 states have internal predecessors, (367), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-03 01:43:40,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 391 transitions. [2022-11-03 01:43:40,267 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 391 transitions. Word has length 50 [2022-11-03 01:43:40,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:40,267 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 391 transitions. [2022-11-03 01:43:40,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 12 states have (on average 6.166666666666667) internal successors, (74), 12 states have internal predecessors, (74), 4 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-03 01:43:40,268 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 391 transitions. [2022-11-03 01:43:40,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-03 01:43:40,269 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:40,269 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:40,307 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-11-03 01:43:40,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:40,491 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:43:40,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:40,491 INFO L85 PathProgramCache]: Analyzing trace with hash -920722335, now seen corresponding path program 1 times [2022-11-03 01:43:40,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:40,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30921983] [2022-11-03 01:43:40,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:40,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:40,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:40,954 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:40,954 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:40,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30921983] [2022-11-03 01:43:40,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30921983] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:43:40,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009264284] [2022-11-03 01:43:40,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:40,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:40,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:43:40,956 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:43:40,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-03 01:43:41,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:41,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 01:43:41,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:41,149 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 01:43:41,150 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:43:41,317 INFO L356 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-03 01:43:41,317 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 15 treesize of output 23 [2022-11-03 01:43:41,390 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:41,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:41,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009264284] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:43:41,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [991980295] [2022-11-03 01:43:41,743 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-03 01:43:41,743 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:43:41,743 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:43:41,743 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:43:41,743 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:43:41,840 INFO L356 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-03 01:43:41,841 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2022-11-03 01:43:41,858 INFO L356 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-11-03 01:43:41,859 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 51 [2022-11-03 01:43:41,959 INFO L356 Elim1Store]: treesize reduction 136, result has 28.0 percent of original size [2022-11-03 01:43:41,959 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 case distinctions, treesize of input 40 treesize of output 73 [2022-11-03 01:43:42,250 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2022-11-03 01:43:42,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:42,342 INFO L356 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-11-03 01:43:42,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 61 [2022-11-03 01:43:42,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:42,361 INFO L356 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-11-03 01:43:42,362 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2022-11-03 01:43:42,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:42,479 INFO L356 Elim1Store]: treesize reduction 128, result has 29.3 percent of original size [2022-11-03 01:43:42,480 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 40 treesize of output 73 [2022-11-03 01:43:42,571 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:43:45,739 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27567#(and (= 6 |~#commands~0.base|) (not (= (select |#valid| |parse_input_~input#1.base|) 1)) (<= 0 ~global~0.offset) (< |parse_input_#t~mem3#1.offset| (select |#length| |parse_input_#t~mem3#1.base|)) (= (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)) |parse_input_#t~mem3#1.offset|) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|)) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (<= 0 |parse_input_#t~mem3#1.offset|) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (= |~#commands~0.offset| 0) (= |parse_input_#t~mem3#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) (= |parse_input_~i~0#1| 0) (<= ~global~0.offset 0) (= |#NULL.offset| 0) (= |parse_input_#in~input#1.offset| 0) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:43:45,739 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:43:45,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:43:45,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2022-11-03 01:43:45,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633040009] [2022-11-03 01:43:45,739 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:43:45,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 01:43:45,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:45,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 01:43:45,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1502, Unknown=0, NotChecked=0, Total=1722 [2022-11-03 01:43:45,740 INFO L87 Difference]: Start difference. First operand 324 states and 391 transitions. Second operand has 20 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 2 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 01:43:46,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:46,621 INFO L93 Difference]: Finished difference Result 340 states and 399 transitions. [2022-11-03 01:43:46,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:43:46,621 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 2 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2022-11-03 01:43:46,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:46,622 INFO L225 Difference]: With dead ends: 340 [2022-11-03 01:43:46,623 INFO L226 Difference]: Without dead ends: 340 [2022-11-03 01:43:46,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 102 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 979 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=473, Invalid=2607, Unknown=0, NotChecked=0, Total=3080 [2022-11-03 01:43:46,623 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 296 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:46,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 400 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 304 Invalid, 0 Unknown, 74 Unchecked, 0.2s Time] [2022-11-03 01:43:46,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-11-03 01:43:46,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 323. [2022-11-03 01:43:46,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 293 states have (on average 1.2457337883959045) internal successors, (365), 306 states have internal predecessors, (365), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-03 01:43:46,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 389 transitions. [2022-11-03 01:43:46,631 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 389 transitions. Word has length 51 [2022-11-03 01:43:46,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:46,631 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 389 transitions. [2022-11-03 01:43:46,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 2 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 01:43:46,632 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 389 transitions. [2022-11-03 01:43:46,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 01:43:46,632 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:46,633 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:46,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:46,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-03 01:43:46,859 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:43:46,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:46,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1522378736, now seen corresponding path program 1 times [2022-11-03 01:43:46,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:46,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839138365] [2022-11-03 01:43:46,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:46,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:46,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:47,235 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:47,236 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:47,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839138365] [2022-11-03 01:43:47,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839138365] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:43:47,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539268366] [2022-11-03 01:43:47,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:47,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:47,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:43:47,252 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:43:47,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-03 01:43:47,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:47,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-03 01:43:47,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:47,853 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 01:43:47,853 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:43:47,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 01:43:47,872 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 01:43:47,887 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 01:43:47,887 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:43:48,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 01:43:48,180 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 01:43:48,180 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:43:48,188 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:43:48,189 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-11-03 01:43:48,384 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 01:43:48,384 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 21 [2022-11-03 01:43:48,415 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:48,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:48,632 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-03 01:43:48,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539268366] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:43:48,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [860477868] [2022-11-03 01:43:48,672 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-03 01:43:48,672 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:43:48,673 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:43:48,673 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:43:48,673 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:43:48,776 INFO L356 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-03 01:43:48,776 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2022-11-03 01:43:48,809 INFO L356 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-11-03 01:43:48,809 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 51 [2022-11-03 01:43:48,914 INFO L356 Elim1Store]: treesize reduction 136, result has 28.0 percent of original size [2022-11-03 01:43:48,914 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 case distinctions, treesize of input 40 treesize of output 73 [2022-11-03 01:43:49,182 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2022-11-03 01:43:49,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:49,299 INFO L356 Elim1Store]: treesize reduction 46, result has 62.3 percent of original size [2022-11-03 01:43:49,300 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 103 [2022-11-03 01:43:49,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:49,446 INFO L356 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-11-03 01:43:49,446 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 61 [2022-11-03 01:43:49,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:49,593 INFO L356 Elim1Store]: treesize reduction 128, result has 29.3 percent of original size [2022-11-03 01:43:49,594 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 40 treesize of output 73 [2022-11-03 01:43:49,619 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-11-03 01:43:49,684 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-11-03 01:43:49,741 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-11-03 01:43:49,810 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:43:53,745 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '28492#(and (= (select |#valid| |parse_input_~input#1.base|) 1) (not (< |parse_input_~input#1.offset| (select |#length| |parse_input_~input#1.base|))) (= 6 |~#commands~0.base|) (<= 0 ~global~0.offset) (< |parse_input_#t~mem3#1.offset| (select |#length| |parse_input_#t~mem3#1.base|)) (= (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)) |parse_input_#t~mem3#1.offset|) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|)) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (<= 0 |parse_input_#t~mem3#1.offset|) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (= |~#commands~0.offset| 0) (= |parse_input_#t~mem3#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) (= |parse_input_~i~0#1| 0) (<= ~global~0.offset 0) (= |#NULL.offset| 0) (= |parse_input_#in~input#1.offset| 0) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:43:53,745 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:43:53,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:43:53,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 25 [2022-11-03 01:43:53,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374662252] [2022-11-03 01:43:53,745 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:43:53,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-03 01:43:53,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:53,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-03 01:43:53,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=2296, Unknown=0, NotChecked=0, Total=2550 [2022-11-03 01:43:53,747 INFO L87 Difference]: Start difference. First operand 323 states and 389 transitions. Second operand has 27 states, 20 states have (on average 4.7) internal successors, (94), 19 states have internal predecessors, (94), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-03 01:43:56,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:56,262 INFO L93 Difference]: Finished difference Result 472 states and 555 transitions. [2022-11-03 01:43:56,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-03 01:43:56,262 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 20 states have (on average 4.7) internal successors, (94), 19 states have internal predecessors, (94), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 52 [2022-11-03 01:43:56,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:56,266 INFO L225 Difference]: With dead ends: 472 [2022-11-03 01:43:56,266 INFO L226 Difference]: Without dead ends: 472 [2022-11-03 01:43:56,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 77 SyntacticMatches, 5 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2318 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=760, Invalid=6380, Unknown=0, NotChecked=0, Total=7140 [2022-11-03 01:43:56,269 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 614 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 1254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 498 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:56,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [614 Valid, 693 Invalid, 1254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 689 Invalid, 0 Unknown, 498 Unchecked, 0.5s Time] [2022-11-03 01:43:56,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-11-03 01:43:56,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 322. [2022-11-03 01:43:56,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 293 states have (on average 1.2389078498293515) internal successors, (363), 305 states have internal predecessors, (363), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-03 01:43:56,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 387 transitions. [2022-11-03 01:43:56,280 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 387 transitions. Word has length 52 [2022-11-03 01:43:56,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:56,281 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 387 transitions. [2022-11-03 01:43:56,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 20 states have (on average 4.7) internal successors, (94), 19 states have internal predecessors, (94), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-03 01:43:56,281 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 387 transitions. [2022-11-03 01:43:56,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-03 01:43:56,282 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:56,282 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:56,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:56,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-03 01:43:56,496 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:43:56,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:56,497 INFO L85 PathProgramCache]: Analyzing trace with hash -219031633, now seen corresponding path program 2 times [2022-11-03 01:43:56,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:56,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970602094] [2022-11-03 01:43:56,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:56,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:56,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:56,826 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 01:43:56,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:56,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970602094] [2022-11-03 01:43:56,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970602094] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:43:56,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424407927] [2022-11-03 01:43:56,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:43:56,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:56,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:43:56,828 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:43:56,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-03 01:43:56,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 01:43:56,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:43:56,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 01:43:56,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:57,076 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-03 01:43:57,173 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 01:43:57,174 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-03 01:43:57,261 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-03 01:43:57,384 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 41 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:43:57,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:57,531 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-03 01:43:57,531 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-03 01:43:57,829 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-03 01:43:57,829 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-03 01:43:57,917 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-03 01:43:58,081 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 42 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:43:58,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424407927] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:43:58,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1293163923] [2022-11-03 01:43:58,083 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-03 01:43:58,083 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:43:58,084 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:43:58,084 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:43:58,084 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:43:58,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:58,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:58,335 INFO L356 Elim1Store]: treesize reduction 165, result has 19.9 percent of original size [2022-11-03 01:43:58,336 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 196 treesize of output 210 [2022-11-03 01:43:58,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:58,437 INFO L356 Elim1Store]: treesize reduction 187, result has 29.7 percent of original size [2022-11-03 01:43:58,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 185 treesize of output 230 [2022-11-03 01:43:58,813 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 35 for LOIs [2022-11-03 01:43:59,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:59,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:59,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:59,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:59,032 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-03 01:43:59,033 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2022-11-03 01:43:59,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:59,090 INFO L356 Elim1Store]: treesize reduction 70, result has 28.6 percent of original size [2022-11-03 01:43:59,090 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 27 treesize of output 45 [2022-11-03 01:43:59,206 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:44:01,906 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29729#(and (<= |parse_input_~input#1.offset| 0) (= 6 |~#commands~0.base|) (<= 3 |parse_input_~input#1.base|) (<= |#NULL.offset| 0) (<= 0 |parse_input_~input#1.offset|) (<= 0 |parse_input_#in~input#1.offset|) (<= 0 |~#commands~0.offset|) (<= |parse_input_#in~input#1.offset| 0) (not (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|))) (<= |parse_input_~input#1.base| 5) (< |parse_input_~i~0#1| 2) (<= 3 |parse_input_#in~input#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (<= 0 |parse_input_~i~0#1|) (<= |~#commands~0.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-03 01:44:01,906 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:44:01,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:44:01,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 29 [2022-11-03 01:44:01,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466022133] [2022-11-03 01:44:01,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:44:01,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-03 01:44:01,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:44:01,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-03 01:44:01,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=1817, Unknown=0, NotChecked=0, Total=2162 [2022-11-03 01:44:01,909 INFO L87 Difference]: Start difference. First operand 322 states and 387 transitions. Second operand has 30 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 27 states have internal predecessors, (135), 7 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-03 01:44:04,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:04,125 INFO L93 Difference]: Finished difference Result 543 states and 634 transitions. [2022-11-03 01:44:04,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-03 01:44:04,126 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 27 states have internal predecessors, (135), 7 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) Word has length 54 [2022-11-03 01:44:04,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:04,128 INFO L225 Difference]: With dead ends: 543 [2022-11-03 01:44:04,128 INFO L226 Difference]: Without dead ends: 543 [2022-11-03 01:44:04,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 146 SyntacticMatches, 15 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3204 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1468, Invalid=6722, Unknown=0, NotChecked=0, Total=8190 [2022-11-03 01:44:04,130 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 972 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 972 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:04,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [972 Valid, 565 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 515 Invalid, 0 Unknown, 203 Unchecked, 0.4s Time] [2022-11-03 01:44:04,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-11-03 01:44:04,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 407. [2022-11-03 01:44:04,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 375 states have (on average 1.256) internal successors, (471), 388 states have internal predecessors, (471), 9 states have call successors, (9), 9 states have call predecessors, (9), 15 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2022-11-03 01:44:04,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 498 transitions. [2022-11-03 01:44:04,140 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 498 transitions. Word has length 54 [2022-11-03 01:44:04,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:04,141 INFO L495 AbstractCegarLoop]: Abstraction has 407 states and 498 transitions. [2022-11-03 01:44:04,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 27 states have internal predecessors, (135), 7 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-03 01:44:04,141 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 498 transitions. [2022-11-03 01:44:04,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-03 01:44:04,142 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:04,142 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:04,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-03 01:44:04,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-03 01:44:04,371 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:44:04,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:04,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1799953919, now seen corresponding path program 1 times [2022-11-03 01:44:04,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:44:04,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090921849] [2022-11-03 01:44:04,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:04,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:44:04,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:04,659 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 01:44:04,660 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:44:04,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090921849] [2022-11-03 01:44:04,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090921849] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:44:04,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275241605] [2022-11-03 01:44:04,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:04,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:44:04,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:44:04,661 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:44:04,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-03 01:44:04,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:04,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 01:44:04,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:04,982 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 01:44:04,983 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:44:05,053 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-03 01:44:05,069 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 01:44:05,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:44:05,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275241605] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:44:05,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [915752076] [2022-11-03 01:44:05,179 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-03 01:44:05,179 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:44:05,179 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:44:05,179 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:44:05,180 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:44:05,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:05,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:05,413 INFO L356 Elim1Store]: treesize reduction 148, result has 13.5 percent of original size [2022-11-03 01:44:05,414 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 183 treesize of output 182 [2022-11-03 01:44:05,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:05,489 INFO L356 Elim1Store]: treesize reduction 174, result has 23.0 percent of original size [2022-11-03 01:44:05,490 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 183 treesize of output 206 [2022-11-03 01:44:05,776 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 35 for LOIs [2022-11-03 01:44:06,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:06,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:06,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:06,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:06,093 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-03 01:44:06,094 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2022-11-03 01:44:06,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:06,158 INFO L356 Elim1Store]: treesize reduction 70, result has 28.6 percent of original size [2022-11-03 01:44:06,159 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 27 treesize of output 45 [2022-11-03 01:44:06,358 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:44:09,696 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '31039#(and (<= |parse_input_~input#1.offset| 0) (<= 0 |#NULL.base|) (<= 6 |~#commands~0.base|) (<= 3 |parse_input_~input#1.base|) (<= |#NULL.offset| 0) (<= 0 |parse_input_~input#1.offset|) (<= |~#commands~0.base| 6) (<= 0 |parse_input_#in~input#1.offset|) (<= 0 |~#commands~0.offset|) (<= |parse_input_#in~input#1.offset| 0) (<= |#NULL.base| 0) (<= |parse_input_~input#1.base| 5) (<= 3 |parse_input_#in~input#1.base|) (<= 0 |#NULL.offset|) (not (= (select |#valid| |parse_input_#t~mem3#1.base|) 1)) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (<= 0 |parse_input_~i~0#1|) (<= |~#commands~0.offset| 0))' at error location [2022-11-03 01:44:09,696 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:44:09,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:44:09,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2022-11-03 01:44:09,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347612201] [2022-11-03 01:44:09,697 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:44:09,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 01:44:09,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:44:09,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 01:44:09,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2022-11-03 01:44:09,698 INFO L87 Difference]: Start difference. First operand 407 states and 498 transitions. Second operand has 13 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 1 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 01:44:10,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:10,176 INFO L93 Difference]: Finished difference Result 447 states and 531 transitions. [2022-11-03 01:44:10,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-03 01:44:10,176 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 1 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 55 [2022-11-03 01:44:10,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:10,178 INFO L225 Difference]: With dead ends: 447 [2022-11-03 01:44:10,179 INFO L226 Difference]: Without dead ends: 447 [2022-11-03 01:44:10,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 93 SyntacticMatches, 11 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=251, Invalid=1729, Unknown=0, NotChecked=0, Total=1980 [2022-11-03 01:44:10,181 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 186 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:10,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 221 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 217 Invalid, 0 Unknown, 48 Unchecked, 0.2s Time] [2022-11-03 01:44:10,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-11-03 01:44:10,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 407. [2022-11-03 01:44:10,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 375 states have (on average 1.248) internal successors, (468), 388 states have internal predecessors, (468), 9 states have call successors, (9), 9 states have call predecessors, (9), 15 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2022-11-03 01:44:10,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 495 transitions. [2022-11-03 01:44:10,194 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 495 transitions. Word has length 55 [2022-11-03 01:44:10,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:10,194 INFO L495 AbstractCegarLoop]: Abstraction has 407 states and 495 transitions. [2022-11-03 01:44:10,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 1 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 01:44:10,195 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 495 transitions. [2022-11-03 01:44:10,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-03 01:44:10,196 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:10,196 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:10,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-03 01:44:10,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-03 01:44:10,410 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:44:10,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:10,410 INFO L85 PathProgramCache]: Analyzing trace with hash -36003314, now seen corresponding path program 1 times [2022-11-03 01:44:10,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:44:10,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396708123] [2022-11-03 01:44:10,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:10,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:44:10,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:11,188 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:44:11,189 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:44:11,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396708123] [2022-11-03 01:44:11,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396708123] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:44:11,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379324329] [2022-11-03 01:44:11,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:11,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:44:11,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:44:11,191 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:44:11,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-03 01:44:11,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:11,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 01:44:11,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:11,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:11,856 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:44:12,071 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-03 01:44:12,074 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-03 01:44:12,125 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 01:44:12,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:44:12,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379324329] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:44:12,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1064389260] [2022-11-03 01:44:12,464 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-03 01:44:12,465 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:44:12,465 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:44:12,465 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:44:12,465 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:44:12,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:12,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:12,725 INFO L356 Elim1Store]: treesize reduction 165, result has 19.9 percent of original size [2022-11-03 01:44:12,726 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 196 treesize of output 210 [2022-11-03 01:44:12,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:12,821 INFO L356 Elim1Store]: treesize reduction 187, result has 29.7 percent of original size [2022-11-03 01:44:12,821 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 185 treesize of output 230 [2022-11-03 01:44:13,180 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 35 for LOIs [2022-11-03 01:44:13,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:13,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:13,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:13,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:13,382 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-03 01:44:13,382 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2022-11-03 01:44:13,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:13,446 INFO L356 Elim1Store]: treesize reduction 70, result has 28.6 percent of original size [2022-11-03 01:44:13,446 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 27 treesize of output 45 [2022-11-03 01:44:13,585 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:44:16,916 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '32174#(and (<= |parse_input_~input#1.offset| 0) (= 6 |~#commands~0.base|) (<= 3 |parse_input_~input#1.base|) (<= 0 |parse_input_~input#1.offset|) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (= |~#commands~0.offset| 0) (<= |parse_input_~input#1.base| 5) (= |#NULL.offset| 0) (or (not (< |parse_input_#t~mem3#1.offset| (select |#length| |parse_input_#t~mem3#1.base|))) (not (<= 0 |parse_input_#t~mem3#1.offset|))) (= |parse_input_#in~input#1.offset| 0) (<= 3 |parse_input_#in~input#1.base|) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (<= 0 |parse_input_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-03 01:44:16,916 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:44:16,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:44:16,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7] total 24 [2022-11-03 01:44:16,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320433474] [2022-11-03 01:44:16,917 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:44:16,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-03 01:44:16,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:44:16,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-03 01:44:16,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=2045, Unknown=0, NotChecked=0, Total=2256 [2022-11-03 01:44:16,919 INFO L87 Difference]: Start difference. First operand 407 states and 495 transitions. Second operand has 26 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 states have internal predecessors, (87), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-03 01:44:18,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:18,737 INFO L93 Difference]: Finished difference Result 627 states and 731 transitions. [2022-11-03 01:44:18,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-03 01:44:18,738 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 states have internal predecessors, (87), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 56 [2022-11-03 01:44:18,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:18,740 INFO L225 Difference]: With dead ends: 627 [2022-11-03 01:44:18,740 INFO L226 Difference]: Without dead ends: 627 [2022-11-03 01:44:18,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 90 SyntacticMatches, 10 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1835 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=584, Invalid=4246, Unknown=0, NotChecked=0, Total=4830 [2022-11-03 01:44:18,741 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 517 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:18,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [517 Valid, 486 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 770 Invalid, 0 Unknown, 109 Unchecked, 0.7s Time] [2022-11-03 01:44:18,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2022-11-03 01:44:18,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 418. [2022-11-03 01:44:18,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 386 states have (on average 1.2253886010362693) internal successors, (473), 399 states have internal predecessors, (473), 9 states have call successors, (9), 9 states have call predecessors, (9), 15 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2022-11-03 01:44:18,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 500 transitions. [2022-11-03 01:44:18,752 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 500 transitions. Word has length 56 [2022-11-03 01:44:18,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:18,752 INFO L495 AbstractCegarLoop]: Abstraction has 418 states and 500 transitions. [2022-11-03 01:44:18,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 states have internal predecessors, (87), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-03 01:44:18,753 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 500 transitions. [2022-11-03 01:44:18,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-03 01:44:18,754 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:18,754 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:18,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-03 01:44:18,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-03 01:44:18,979 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:44:18,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:18,979 INFO L85 PathProgramCache]: Analyzing trace with hash -218314186, now seen corresponding path program 1 times [2022-11-03 01:44:18,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:44:18,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266248317] [2022-11-03 01:44:18,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:18,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:44:18,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:19,667 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:44:19,667 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:44:19,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266248317] [2022-11-03 01:44:19,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266248317] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:44:19,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617053643] [2022-11-03 01:44:19,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:19,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:44:19,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:44:19,671 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:44:19,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-03 01:44:19,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:19,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-03 01:44:19,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:20,038 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 01:44:20,038 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:44:20,255 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 01:44:20,255 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-03 01:44:20,365 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 01:44:20,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:20,483 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:44:20,637 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 01:44:20,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 21 [2022-11-03 01:44:20,761 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:44:20,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:44:21,018 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-03 01:44:21,030 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-03 01:44:21,031 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-03 01:44:21,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617053643] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:44:21,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1059080141] [2022-11-03 01:44:21,126 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-03 01:44:21,127 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:44:21,127 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:44:21,127 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:44:21,127 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:44:21,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:21,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:21,351 INFO L356 Elim1Store]: treesize reduction 165, result has 19.9 percent of original size [2022-11-03 01:44:21,352 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 196 treesize of output 210 [2022-11-03 01:44:21,459 INFO L356 Elim1Store]: treesize reduction 205, result has 30.0 percent of original size [2022-11-03 01:44:21,459 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 185 treesize of output 234 [2022-11-03 01:44:21,736 INFO L356 Elim1Store]: treesize reduction 240, result has 28.8 percent of original size [2022-11-03 01:44:21,736 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 457 treesize of output 461 [2022-11-03 01:44:22,531 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2022-11-03 01:44:22,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:22,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:22,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:22,942 INFO L356 Elim1Store]: treesize reduction 157, result has 20.7 percent of original size [2022-11-03 01:44:22,942 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 232 treesize of output 246 [2022-11-03 01:44:22,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:23,056 INFO L356 Elim1Store]: treesize reduction 197, result has 30.9 percent of original size [2022-11-03 01:44:23,057 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 221 treesize of output 270 [2022-11-03 01:44:23,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:23,500 INFO L356 Elim1Store]: treesize reduction 232, result has 29.5 percent of original size [2022-11-03 01:44:23,500 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 547 treesize of output 551 [2022-11-03 01:44:24,595 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:44:33,175 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '33520#(and (<= |parse_input_~input#1.offset| 0) (= 6 |~#commands~0.base|) (<= 0 ~global~0.offset) (<= 3 |parse_input_~input#1.base|) (<= |#NULL.offset| 0) (<= 0 |parse_input_~input#1.offset|) (<= 0 |parse_input_#in~input#1.offset|) (<= 0 |~#commands~0.offset|) (<= |parse_input_#in~input#1.offset| 0) (<= ~global~0.offset 0) (not (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|))) (<= |parse_input_~input#1.base| 5) (< |parse_input_~i~0#1| 2) (<= 3 |parse_input_#in~input#1.base|) (<= 0 |#NULL.offset|) (= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (<= 0 |parse_input_~i~0#1|) (<= |~#commands~0.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-03 01:44:33,176 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:44:33,176 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:44:33,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 28 [2022-11-03 01:44:33,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191709847] [2022-11-03 01:44:33,176 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:44:33,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-03 01:44:33,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:44:33,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-03 01:44:33,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=2667, Unknown=0, NotChecked=0, Total=2970 [2022-11-03 01:44:33,178 INFO L87 Difference]: Start difference. First operand 418 states and 500 transitions. Second operand has 30 states, 25 states have (on average 4.08) internal successors, (102), 25 states have internal predecessors, (102), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-03 01:44:35,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:35,966 INFO L93 Difference]: Finished difference Result 829 states and 963 transitions. [2022-11-03 01:44:35,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-03 01:44:35,967 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 4.08) internal successors, (102), 25 states have internal predecessors, (102), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 56 [2022-11-03 01:44:35,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:35,970 INFO L225 Difference]: With dead ends: 829 [2022-11-03 01:44:35,971 INFO L226 Difference]: Without dead ends: 829 [2022-11-03 01:44:35,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 89 SyntacticMatches, 4 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2960 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=1089, Invalid=7467, Unknown=0, NotChecked=0, Total=8556 [2022-11-03 01:44:35,973 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 733 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 733 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 1221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 455 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:35,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [733 Valid, 538 Invalid, 1221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 601 Invalid, 0 Unknown, 455 Unchecked, 0.6s Time] [2022-11-03 01:44:35,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2022-11-03 01:44:35,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 600. [2022-11-03 01:44:35,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 553 states have (on average 1.197106690777577) internal successors, (662), 573 states have internal predecessors, (662), 13 states have call successors, (13), 13 states have call predecessors, (13), 26 states have return successors, (34), 13 states have call predecessors, (34), 13 states have call successors, (34) [2022-11-03 01:44:35,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 709 transitions. [2022-11-03 01:44:35,987 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 709 transitions. Word has length 56 [2022-11-03 01:44:35,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:35,987 INFO L495 AbstractCegarLoop]: Abstraction has 600 states and 709 transitions. [2022-11-03 01:44:35,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 4.08) internal successors, (102), 25 states have internal predecessors, (102), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-03 01:44:35,988 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 709 transitions. [2022-11-03 01:44:35,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-03 01:44:35,989 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:35,989 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:36,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-03 01:44:36,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-03 01:44:36,207 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:44:36,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:36,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1822194776, now seen corresponding path program 1 times [2022-11-03 01:44:36,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:44:36,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546827211] [2022-11-03 01:44:36,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:36,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:44:36,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:36,940 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:44:36,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:44:36,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546827211] [2022-11-03 01:44:36,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546827211] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:44:36,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799144036] [2022-11-03 01:44:36,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:36,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:44:36,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:44:36,942 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:44:36,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-03 01:44:37,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:37,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 01:44:37,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:37,254 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 01:44:37,254 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:44:37,520 INFO L356 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-03 01:44:37,520 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 15 treesize of output 23 [2022-11-03 01:44:37,652 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-03 01:44:37,681 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:44:37,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:44:37,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799144036] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:44:37,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [415091177] [2022-11-03 01:44:37,846 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-03 01:44:37,846 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:44:37,846 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:44:37,847 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:44:37,847 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:44:37,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:37,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:38,032 INFO L356 Elim1Store]: treesize reduction 165, result has 19.9 percent of original size [2022-11-03 01:44:38,032 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 196 treesize of output 210 [2022-11-03 01:44:38,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:38,124 INFO L356 Elim1Store]: treesize reduction 187, result has 29.7 percent of original size [2022-11-03 01:44:38,125 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 185 treesize of output 230 [2022-11-03 01:44:38,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:38,386 INFO L356 Elim1Store]: treesize reduction 240, result has 28.8 percent of original size [2022-11-03 01:44:38,387 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 457 treesize of output 461 [2022-11-03 01:44:39,000 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2022-11-03 01:44:39,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:39,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:39,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:39,403 INFO L356 Elim1Store]: treesize reduction 140, result has 14.1 percent of original size [2022-11-03 01:44:39,404 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 219 treesize of output 218 [2022-11-03 01:44:39,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:39,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:39,487 INFO L356 Elim1Store]: treesize reduction 166, result has 23.9 percent of original size [2022-11-03 01:44:39,487 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 219 treesize of output 242 [2022-11-03 01:44:39,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:39,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:39,737 INFO L356 Elim1Store]: treesize reduction 199, result has 26.8 percent of original size [2022-11-03 01:44:39,737 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 224 treesize of output 261 [2022-11-03 01:44:40,053 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:44:47,795 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '35289#(and (or (and (= 6 |~#commands~0.base|) (= (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)) |parse_input_#t~mem3#1.offset|) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|)) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (= |parse_input_#t~mem3#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) (= |parse_input_~i~0#1| 0) (= |old(~global~0.offset)| 0) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0)) (and (= (select |#valid| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) |~#commands~0.offset|)) 1) (= (select |#valid| |parse_input_~input#1.base|) 1) (= 6 |~#commands~0.base|) (< |parse_input_~input#1.offset| (select |#length| |parse_input_~input#1.base|)) (= (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)) |parse_input_#t~mem3#1.offset|) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (= |parse_input_~i~0#1| 1) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|)) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (= |parse_input_#t~mem3#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) (<= 0 (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) |~#commands~0.offset|)) (= |old(~global~0.offset)| 0) (< (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) |~#commands~0.offset|) (select |#length| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) |~#commands~0.offset|))) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0))) (<= 0 ~global~0.offset) (<= |#NULL.offset| 0) (<= 0 |parse_input_#in~input#1.offset|) (<= 0 |~#commands~0.offset|) (<= |parse_input_#in~input#1.offset| 0) (<= ~global~0.offset 0) (<= 3 |parse_input_#in~input#1.base|) (<= 0 |#NULL.offset|) (not (= (select |#valid| |parse_input_#t~mem3#1.base|) 1)) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (<= |~#commands~0.offset| 0))' at error location [2022-11-03 01:44:47,795 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:44:47,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:44:47,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2022-11-03 01:44:47,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261498950] [2022-11-03 01:44:47,795 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:44:47,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-03 01:44:47,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:44:47,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-03 01:44:47,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=2034, Unknown=0, NotChecked=0, Total=2256 [2022-11-03 01:44:47,797 INFO L87 Difference]: Start difference. First operand 600 states and 709 transitions. Second operand has 25 states, 23 states have (on average 4.478260869565218) internal successors, (103), 22 states have internal predecessors, (103), 3 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 01:44:50,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:50,143 INFO L93 Difference]: Finished difference Result 769 states and 883 transitions. [2022-11-03 01:44:50,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-03 01:44:50,144 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 4.478260869565218) internal successors, (103), 22 states have internal predecessors, (103), 3 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2022-11-03 01:44:50,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:50,147 INFO L225 Difference]: With dead ends: 769 [2022-11-03 01:44:50,147 INFO L226 Difference]: Without dead ends: 769 [2022-11-03 01:44:50,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 97 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1964 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=639, Invalid=5523, Unknown=0, NotChecked=0, Total=6162 [2022-11-03 01:44:50,148 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 514 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 206 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:50,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [514 Valid, 584 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 563 Invalid, 0 Unknown, 206 Unchecked, 0.5s Time] [2022-11-03 01:44:50,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2022-11-03 01:44:50,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 616. [2022-11-03 01:44:50,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 569 states have (on average 1.1880492091388402) internal successors, (676), 589 states have internal predecessors, (676), 13 states have call successors, (13), 13 states have call predecessors, (13), 27 states have return successors, (33), 13 states have call predecessors, (33), 13 states have call successors, (33) [2022-11-03 01:44:50,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 722 transitions. [2022-11-03 01:44:50,162 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 722 transitions. Word has length 57 [2022-11-03 01:44:50,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:50,162 INFO L495 AbstractCegarLoop]: Abstraction has 616 states and 722 transitions. [2022-11-03 01:44:50,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 4.478260869565218) internal successors, (103), 22 states have internal predecessors, (103), 3 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 01:44:50,163 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 722 transitions. [2022-11-03 01:44:50,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-03 01:44:50,164 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:50,164 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:50,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-03 01:44:50,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-03 01:44:50,383 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:44:50,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:50,383 INFO L85 PathProgramCache]: Analyzing trace with hash 653463253, now seen corresponding path program 1 times [2022-11-03 01:44:50,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:44:50,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998309431] [2022-11-03 01:44:50,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:50,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:44:50,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:51,248 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:44:51,248 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:44:51,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998309431] [2022-11-03 01:44:51,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998309431] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:44:51,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73703934] [2022-11-03 01:44:51,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:51,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:44:51,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:44:51,251 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:44:51,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-03 01:44:51,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:51,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-03 01:44:51,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:52,160 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 01:44:52,160 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:44:52,197 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 01:44:52,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:44:52,846 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 01:44:53,036 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 01:44:53,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:44:53,048 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:44:53,049 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-11-03 01:44:53,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-11-03 01:44:53,636 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:44:53,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2022-11-03 01:44:53,729 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 01:44:53,729 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 21 [2022-11-03 01:44:53,780 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:44:53,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:44:54,235 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-11-03 01:44:54,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73703934] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:44:54,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1243080303] [2022-11-03 01:44:54,362 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-03 01:44:54,362 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:44:54,363 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:44:54,363 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:44:54,363 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:44:54,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:54,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:54,580 INFO L356 Elim1Store]: treesize reduction 165, result has 19.9 percent of original size [2022-11-03 01:44:54,581 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 196 treesize of output 210 [2022-11-03 01:44:54,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:54,678 INFO L356 Elim1Store]: treesize reduction 187, result has 29.7 percent of original size [2022-11-03 01:44:54,678 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 185 treesize of output 230 [2022-11-03 01:44:54,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:54,940 INFO L356 Elim1Store]: treesize reduction 240, result has 28.8 percent of original size [2022-11-03 01:44:54,941 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 379 treesize of output 404 [2022-11-03 01:44:55,557 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2022-11-03 01:44:55,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:55,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:55,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:55,969 INFO L356 Elim1Store]: treesize reduction 140, result has 14.1 percent of original size [2022-11-03 01:44:55,969 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 219 treesize of output 218 [2022-11-03 01:44:55,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:55,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:56,055 INFO L356 Elim1Store]: treesize reduction 166, result has 23.9 percent of original size [2022-11-03 01:44:56,055 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 219 treesize of output 242 [2022-11-03 01:44:56,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:56,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:56,307 INFO L356 Elim1Store]: treesize reduction 199, result has 26.8 percent of original size [2022-11-03 01:44:56,307 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 224 treesize of output 261 [2022-11-03 01:44:56,378 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-03 01:44:56,438 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-03 01:44:56,494 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-03 01:44:56,562 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:45:04,703 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '37016#(and (or (and (= 6 |~#commands~0.base|) (= (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)) |parse_input_#t~mem3#1.offset|) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|)) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (= |parse_input_#t~mem3#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) (= |parse_input_~i~0#1| 0) (= |old(~global~0.offset)| 0) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0)) (and (= (select |#valid| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) |~#commands~0.offset|)) 1) (= (select |#valid| |parse_input_~input#1.base|) 1) (= 6 |~#commands~0.base|) (< |parse_input_~input#1.offset| (select |#length| |parse_input_~input#1.base|)) (= (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)) |parse_input_#t~mem3#1.offset|) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (= |parse_input_~i~0#1| 1) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|)) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (= |parse_input_#t~mem3#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) (<= 0 (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) |~#commands~0.offset|)) (= |old(~global~0.offset)| 0) (< (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) |~#commands~0.offset|) (select |#length| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) |~#commands~0.offset|))) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0))) (<= 0 ~global~0.offset) (<= |#NULL.offset| 0) (<= 0 |parse_input_#in~input#1.offset|) (<= 0 |~#commands~0.offset|) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (<= |parse_input_#in~input#1.offset| 0) (<= ~global~0.offset 0) (or (not (< |parse_input_#t~mem3#1.offset| (select |#length| |parse_input_#t~mem3#1.base|))) (not (<= 0 |parse_input_#t~mem3#1.offset|))) (<= 3 |parse_input_#in~input#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (<= |~#commands~0.offset| 0))' at error location [2022-11-03 01:45:04,703 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:45:04,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:45:04,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2022-11-03 01:45:04,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466349685] [2022-11-03 01:45:04,704 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:45:04,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-03 01:45:04,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:45:04,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-03 01:45:04,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=3021, Unknown=0, NotChecked=0, Total=3306 [2022-11-03 01:45:04,705 INFO L87 Difference]: Start difference. First operand 616 states and 722 transitions. Second operand has 32 states, 27 states have (on average 3.925925925925926) internal successors, (106), 26 states have internal predecessors, (106), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-03 01:45:08,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:45:08,560 INFO L93 Difference]: Finished difference Result 777 states and 896 transitions. [2022-11-03 01:45:08,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-03 01:45:08,561 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 27 states have (on average 3.925925925925926) internal successors, (106), 26 states have internal predecessors, (106), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 58 [2022-11-03 01:45:08,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:45:08,563 INFO L225 Difference]: With dead ends: 777 [2022-11-03 01:45:08,563 INFO L226 Difference]: Without dead ends: 777 [2022-11-03 01:45:08,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3016 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=859, Invalid=8261, Unknown=0, NotChecked=0, Total=9120 [2022-11-03 01:45:08,565 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 549 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 1348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 653 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:45:08,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [549 Valid, 670 Invalid, 1348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 628 Invalid, 0 Unknown, 653 Unchecked, 0.6s Time] [2022-11-03 01:45:08,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2022-11-03 01:45:08,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 612. [2022-11-03 01:45:08,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 566 states have (on average 1.185512367491166) internal successors, (671), 585 states have internal predecessors, (671), 13 states have call successors, (13), 13 states have call predecessors, (13), 27 states have return successors, (31), 13 states have call predecessors, (31), 13 states have call successors, (31) [2022-11-03 01:45:08,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 715 transitions. [2022-11-03 01:45:08,586 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 715 transitions. Word has length 58 [2022-11-03 01:45:08,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:45:08,586 INFO L495 AbstractCegarLoop]: Abstraction has 612 states and 715 transitions. [2022-11-03 01:45:08,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 27 states have (on average 3.925925925925926) internal successors, (106), 26 states have internal predecessors, (106), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-03 01:45:08,587 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 715 transitions. [2022-11-03 01:45:08,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 01:45:08,588 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:45:08,589 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:45:08,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-03 01:45:08,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:45:08,803 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:45:08,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:45:08,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1273148673, now seen corresponding path program 1 times [2022-11-03 01:45:08,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:45:08,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122110505] [2022-11-03 01:45:08,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:08,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:45:08,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:08,967 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 01:45:08,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:45:08,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122110505] [2022-11-03 01:45:08,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122110505] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:45:08,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622825548] [2022-11-03 01:45:08,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:08,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:45:08,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:45:08,970 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:45:08,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-03 01:45:09,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:09,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 01:45:09,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:45:09,118 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 01:45:09,169 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 01:45:09,169 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:45:09,179 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 01:45:09,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:45:09,345 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 01:45:09,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622825548] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:45:09,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [864748080] [2022-11-03 01:45:09,347 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-03 01:45:09,347 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:45:09,348 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:45:09,348 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:45:09,348 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:45:09,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:09,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:09,619 INFO L356 Elim1Store]: treesize reduction 165, result has 19.9 percent of original size [2022-11-03 01:45:09,644 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 196 treesize of output 210 [2022-11-03 01:45:09,775 INFO L356 Elim1Store]: treesize reduction 205, result has 30.0 percent of original size [2022-11-03 01:45:09,776 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 185 treesize of output 234 [2022-11-03 01:45:10,160 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 35 for LOIs [2022-11-03 01:45:10,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:10,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:10,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:10,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:10,444 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-03 01:45:10,444 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2022-11-03 01:45:10,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:10,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:10,510 INFO L356 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2022-11-03 01:45:10,511 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 41 [2022-11-03 01:45:10,703 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:45:14,171 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '38863#(and (<= |parse_input_~input#1.offset| 0) (= |parse_input_c1_~x~0#1.offset| 0) (not (= ~global~0.base 0)) (= (select |#valid| |parse_input_~input#1.base|) 1) (not (= (select |#valid| ~global~0.base) 1)) (= 6 |~#commands~0.base|) (= |parse_input_#t~mem6#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4))) (not (= |parse_input_c1_~x~0#1.base| 0)) (= |parse_input_##fun~~TO~VOID_#in~#fp#1.base| |parse_input_#t~mem6#1.base|) (<= 3 |parse_input_~input#1.base|) (< |parse_input_~input#1.offset| (select |#length| |parse_input_~input#1.base|)) (<= 0 |parse_input_~input#1.offset|) (= (select |#valid| |parse_input_c1_~x~0#1.base|) 1) (= (select |#length| |parse_input_c1_~x~0#1.base|) 1) (< ~global~0.base |#StackHeapBarrier|) (= ~global~0.offset 0) (= |parse_input_#t~mem6#1.offset| |parse_input_##fun~~TO~VOID_#in~#fp#1.offset|) (<= (select (select |#memory_int| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 8)) ~state~0) (= |~#commands~0.offset| 0) (= |parse_input_#t~mem6#1.offset| (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4))) (not (= |parse_input_c1_~x~0#1.base| |parse_input_~input#1.base|)) (<= |parse_input_~input#1.base| 5) (= |#NULL.offset| 0) (= |parse_input_#in~input#1.offset| 0) (< |parse_input_c1_~x~0#1.base| |#StackHeapBarrier|) (<= 3 |parse_input_#in~input#1.base|) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (<= 0 |parse_input_~i~0#1|) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 9) (select |#length| |~#commands~0.base|)) (or (not (= |parse_input_##fun~~TO~VOID_#in~#fp#1.offset| |#funAddr~c2.offset|)) (not (= |parse_input_##fun~~TO~VOID_#in~#fp#1.base| |#funAddr~c2.base|))) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:45:14,172 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:45:14,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:45:14,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4] total 5 [2022-11-03 01:45:14,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341873306] [2022-11-03 01:45:14,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:45:14,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:45:14,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:45:14,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:45:14,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2022-11-03 01:45:14,174 INFO L87 Difference]: Start difference. First operand 612 states and 715 transitions. Second operand has 6 states, 5 states have (on average 11.8) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:45:14,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:45:14,216 INFO L93 Difference]: Finished difference Result 621 states and 724 transitions. [2022-11-03 01:45:14,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:45:14,217 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.8) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 60 [2022-11-03 01:45:14,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:45:14,219 INFO L225 Difference]: With dead ends: 621 [2022-11-03 01:45:14,219 INFO L226 Difference]: Without dead ends: 621 [2022-11-03 01:45:14,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 151 SyntacticMatches, 10 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2022-11-03 01:45:14,219 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 39 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:45:14,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 109 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 43 Unchecked, 0.0s Time] [2022-11-03 01:45:14,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2022-11-03 01:45:14,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 616. [2022-11-03 01:45:14,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 570 states have (on average 1.1842105263157894) internal successors, (675), 589 states have internal predecessors, (675), 13 states have call successors, (13), 13 states have call predecessors, (13), 27 states have return successors, (31), 13 states have call predecessors, (31), 13 states have call successors, (31) [2022-11-03 01:45:14,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 719 transitions. [2022-11-03 01:45:14,232 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 719 transitions. Word has length 60 [2022-11-03 01:45:14,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:45:14,232 INFO L495 AbstractCegarLoop]: Abstraction has 616 states and 719 transitions. [2022-11-03 01:45:14,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.8) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:45:14,233 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 719 transitions. [2022-11-03 01:45:14,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 01:45:14,234 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:45:14,235 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:45:14,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-03 01:45:14,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:45:14,463 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:45:14,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:45:14,463 INFO L85 PathProgramCache]: Analyzing trace with hash 2072763543, now seen corresponding path program 2 times [2022-11-03 01:45:14,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:45:14,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134693834] [2022-11-03 01:45:14,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:14,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:45:14,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:14,664 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 01:45:14,664 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:45:14,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134693834] [2022-11-03 01:45:14,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134693834] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:45:14,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973909889] [2022-11-03 01:45:14,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:45:14,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:45:14,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:45:14,667 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:45:14,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-03 01:45:14,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-03 01:45:14,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:45:14,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 01:45:14,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:45:14,845 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 01:45:15,000 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 01:45:15,001 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:45:15,013 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 01:45:15,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:45:15,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973909889] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:45:15,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1643761013] [2022-11-03 01:45:15,133 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-03 01:45:15,133 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:45:15,134 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:45:15,134 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:45:15,134 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:45:15,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:15,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:15,414 INFO L356 Elim1Store]: treesize reduction 148, result has 13.5 percent of original size [2022-11-03 01:45:15,414 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 183 treesize of output 182 [2022-11-03 01:45:15,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:15,504 INFO L356 Elim1Store]: treesize reduction 174, result has 23.0 percent of original size [2022-11-03 01:45:15,505 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 183 treesize of output 206 [2022-11-03 01:45:15,833 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 35 for LOIs [2022-11-03 01:45:16,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:16,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:16,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:16,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:16,053 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-03 01:45:16,053 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2022-11-03 01:45:16,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:16,120 INFO L356 Elim1Store]: treesize reduction 70, result has 28.6 percent of original size [2022-11-03 01:45:16,120 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 27 treesize of output 45 [2022-11-03 01:45:16,335 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:45:20,063 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '40364#(and (<= |parse_input_~input#1.offset| 0) (= |parse_input_c1_~x~0#1.offset| 0) (not (= ~global~0.base 0)) (= (select |#valid| |parse_input_~input#1.base|) 1) (not (= (select |#valid| ~global~0.base) 1)) (= 6 |~#commands~0.base|) (= |parse_input_#t~mem6#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4))) (not (= |parse_input_c1_~x~0#1.base| 0)) (= |parse_input_##fun~~TO~VOID_#in~#fp#1.base| |parse_input_#t~mem6#1.base|) (<= 3 |parse_input_~input#1.base|) (< |parse_input_~input#1.offset| (select |#length| |parse_input_~input#1.base|)) (<= 0 |parse_input_~input#1.offset|) (= (select |#valid| |parse_input_c1_~x~0#1.base|) 1) (= (select |#length| |parse_input_c1_~x~0#1.base|) 1) (< ~global~0.base |#StackHeapBarrier|) (= ~global~0.offset 0) (= |parse_input_#t~mem6#1.offset| |parse_input_##fun~~TO~VOID_#in~#fp#1.offset|) (<= (select (select |#memory_int| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 8)) ~state~0) (= |~#commands~0.offset| 0) (= |parse_input_#t~mem6#1.offset| (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4))) (not (= |parse_input_c1_~x~0#1.base| |parse_input_~input#1.base|)) (<= |parse_input_~input#1.base| 5) (= |#NULL.offset| 0) (= |parse_input_#in~input#1.offset| 0) (< |parse_input_c1_~x~0#1.base| |#StackHeapBarrier|) (<= 3 |parse_input_#in~input#1.base|) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (<= 0 |parse_input_~i~0#1|) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 9) (select |#length| |~#commands~0.base|)) (or (not (= |parse_input_##fun~~TO~VOID_#in~#fp#1.offset| |#funAddr~c2.offset|)) (not (= |parse_input_##fun~~TO~VOID_#in~#fp#1.base| |#funAddr~c2.base|))) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:45:20,063 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:45:20,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:45:20,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2022-11-03 01:45:20,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178522293] [2022-11-03 01:45:20,063 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:45:20,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:45:20,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:45:20,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:45:20,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2022-11-03 01:45:20,064 INFO L87 Difference]: Start difference. First operand 616 states and 719 transitions. Second operand has 5 states, 4 states have (on average 11.75) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 01:45:20,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:45:20,178 INFO L93 Difference]: Finished difference Result 639 states and 737 transitions. [2022-11-03 01:45:20,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:45:20,178 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.75) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 60 [2022-11-03 01:45:20,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:45:20,182 INFO L225 Difference]: With dead ends: 639 [2022-11-03 01:45:20,182 INFO L226 Difference]: Without dead ends: 639 [2022-11-03 01:45:20,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 112 SyntacticMatches, 10 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2022-11-03 01:45:20,182 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 37 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:45:20,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 105 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:45:20,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-11-03 01:45:20,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 611. [2022-11-03 01:45:20,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 565 states have (on average 1.1787610619469027) internal successors, (666), 584 states have internal predecessors, (666), 13 states have call successors, (13), 13 states have call predecessors, (13), 27 states have return successors, (31), 13 states have call predecessors, (31), 13 states have call successors, (31) [2022-11-03 01:45:20,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 710 transitions. [2022-11-03 01:45:20,195 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 710 transitions. Word has length 60 [2022-11-03 01:45:20,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:45:20,196 INFO L495 AbstractCegarLoop]: Abstraction has 611 states and 710 transitions. [2022-11-03 01:45:20,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.75) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 01:45:20,196 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 710 transitions. [2022-11-03 01:45:20,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 01:45:20,198 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:45:20,198 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:45:20,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-03 01:45:20,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-11-03 01:45:20,416 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:45:20,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:45:20,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1783899014, now seen corresponding path program 1 times [2022-11-03 01:45:20,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:45:20,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880324337] [2022-11-03 01:45:20,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:20,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:45:20,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:20,483 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 01:45:20,483 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:45:20,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880324337] [2022-11-03 01:45:20,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880324337] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:45:20,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741711242] [2022-11-03 01:45:20,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:20,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:45:20,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:45:20,485 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:45:20,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-03 01:45:20,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:20,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:45:20,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:45:20,687 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 01:45:20,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:45:20,763 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 01:45:20,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741711242] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:45:20,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [718949533] [2022-11-03 01:45:20,764 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-03 01:45:20,765 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:45:20,765 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:45:20,765 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:45:20,766 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:45:20,891 INFO L356 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-03 01:45:20,892 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2022-11-03 01:45:20,917 INFO L356 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-11-03 01:45:20,918 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 51 [2022-11-03 01:45:21,053 INFO L356 Elim1Store]: treesize reduction 136, result has 28.0 percent of original size [2022-11-03 01:45:21,054 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 case distinctions, treesize of input 40 treesize of output 73 [2022-11-03 01:45:21,407 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2022-11-03 01:45:21,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:21,535 INFO L356 Elim1Store]: treesize reduction 46, result has 62.3 percent of original size [2022-11-03 01:45:21,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 103 [2022-11-03 01:45:21,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:21,690 INFO L356 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-11-03 01:45:21,690 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 61 [2022-11-03 01:45:21,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:21,883 INFO L356 Elim1Store]: treesize reduction 128, result has 29.3 percent of original size [2022-11-03 01:45:21,883 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 40 treesize of output 73 [2022-11-03 01:45:21,921 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-03 01:45:21,976 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-03 01:45:22,013 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-03 01:45:22,081 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:45:25,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [718949533] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:45:25,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:45:25,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [3, 3, 3] total 21 [2022-11-03 01:45:25,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032653269] [2022-11-03 01:45:25,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:45:25,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 01:45:25,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:45:25,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 01:45:25,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2022-11-03 01:45:25,902 INFO L87 Difference]: Start difference. First operand 611 states and 710 transitions. Second operand has 20 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 01:45:26,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:45:26,807 INFO L93 Difference]: Finished difference Result 674 states and 779 transitions. [2022-11-03 01:45:26,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-03 01:45:26,808 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 60 [2022-11-03 01:45:26,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:45:26,809 INFO L225 Difference]: With dead ends: 674 [2022-11-03 01:45:26,809 INFO L226 Difference]: Without dead ends: 674 [2022-11-03 01:45:26,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 157 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2022-11-03 01:45:26,810 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 87 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:45:26,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 124 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 01:45:26,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-11-03 01:45:26,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 663. [2022-11-03 01:45:26,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 614 states have (on average 1.1758957654723128) internal successors, (722), 634 states have internal predecessors, (722), 14 states have call successors, (14), 14 states have call predecessors, (14), 29 states have return successors, (34), 14 states have call predecessors, (34), 14 states have call successors, (34) [2022-11-03 01:45:26,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 770 transitions. [2022-11-03 01:45:26,822 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 770 transitions. Word has length 60 [2022-11-03 01:45:26,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:45:26,823 INFO L495 AbstractCegarLoop]: Abstraction has 663 states and 770 transitions. [2022-11-03 01:45:26,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 01:45:26,823 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 770 transitions. [2022-11-03 01:45:26,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-03 01:45:26,825 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:45:26,825 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:45:26,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-03 01:45:27,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:45:27,051 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:45:27,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:45:27,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1519055311, now seen corresponding path program 1 times [2022-11-03 01:45:27,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:45:27,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604911393] [2022-11-03 01:45:27,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:27,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:45:27,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:27,184 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 01:45:27,184 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:45:27,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604911393] [2022-11-03 01:45:27,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604911393] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:45:27,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559767038] [2022-11-03 01:45:27,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:27,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:45:27,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:45:27,187 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:45:27,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-03 01:45:27,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:27,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:45:27,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:45:27,444 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 01:45:27,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:45:27,657 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 01:45:27,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559767038] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 01:45:27,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:45:27,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 5] total 9 [2022-11-03 01:45:27,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037551869] [2022-11-03 01:45:27,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:45:27,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:45:27,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:45:27,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:45:27,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:45:27,659 INFO L87 Difference]: Start difference. First operand 663 states and 770 transitions. Second operand has 6 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 01:45:27,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:45:27,765 INFO L93 Difference]: Finished difference Result 605 states and 688 transitions. [2022-11-03 01:45:27,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:45:27,765 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 61 [2022-11-03 01:45:27,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:45:27,767 INFO L225 Difference]: With dead ends: 605 [2022-11-03 01:45:27,768 INFO L226 Difference]: Without dead ends: 581 [2022-11-03 01:45:27,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-11-03 01:45:27,768 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 68 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:45:27,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 155 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:45:27,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-11-03 01:45:27,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 521. [2022-11-03 01:45:27,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 481 states have (on average 1.1683991683991684) internal successors, (562), 498 states have internal predecessors, (562), 11 states have call successors, (11), 11 states have call predecessors, (11), 23 states have return successors, (26), 11 states have call predecessors, (26), 11 states have call successors, (26) [2022-11-03 01:45:27,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 599 transitions. [2022-11-03 01:45:27,780 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 599 transitions. Word has length 61 [2022-11-03 01:45:27,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:45:27,780 INFO L495 AbstractCegarLoop]: Abstraction has 521 states and 599 transitions. [2022-11-03 01:45:27,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 01:45:27,781 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 599 transitions. [2022-11-03 01:45:27,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-03 01:45:27,782 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:45:27,783 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:45:27,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-03 01:45:28,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-11-03 01:45:28,007 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:45:28,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:45:28,007 INFO L85 PathProgramCache]: Analyzing trace with hash 635004488, now seen corresponding path program 1 times [2022-11-03 01:45:28,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:45:28,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987633615] [2022-11-03 01:45:28,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:28,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:45:28,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:28,318 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:45:28,318 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:45:28,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987633615] [2022-11-03 01:45:28,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987633615] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:45:28,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908080255] [2022-11-03 01:45:28,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:28,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:45:28,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:45:28,320 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:45:28,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-03 01:45:28,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:28,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 01:45:28,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:45:28,465 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 01:45:28,636 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 01:45:28,636 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 20 treesize of output 21 [2022-11-03 01:45:28,667 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 01:45:28,668 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:45:28,682 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:45:28,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:45:28,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908080255] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:45:28,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [323836241] [2022-11-03 01:45:28,779 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-03 01:45:28,779 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:45:28,779 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:45:28,780 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:45:28,780 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:45:28,896 INFO L356 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-03 01:45:28,896 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2022-11-03 01:45:28,921 INFO L356 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-11-03 01:45:28,922 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 51 [2022-11-03 01:45:29,062 INFO L356 Elim1Store]: treesize reduction 136, result has 28.0 percent of original size [2022-11-03 01:45:29,062 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 case distinctions, treesize of input 40 treesize of output 73 [2022-11-03 01:45:29,439 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2022-11-03 01:45:29,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:29,569 INFO L356 Elim1Store]: treesize reduction 46, result has 62.3 percent of original size [2022-11-03 01:45:29,569 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 103 [2022-11-03 01:45:29,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:29,733 INFO L356 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-11-03 01:45:29,733 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 61 [2022-11-03 01:45:29,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:29,915 INFO L356 Elim1Store]: treesize reduction 128, result has 29.3 percent of original size [2022-11-03 01:45:29,916 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 40 treesize of output 73 [2022-11-03 01:45:29,950 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-03 01:45:30,003 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-03 01:45:30,041 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-03 01:45:30,112 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:45:35,809 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '45112#(and (= |parse_input_c1_~x~0#1.offset| 0) (not (= ~global~0.base 0)) (= (select |#valid| |parse_input_~input#1.base|) 1) (not (= (select |#valid| ~global~0.base) 1)) (= 6 |~#commands~0.base|) (= |parse_input_#t~mem6#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4))) (not (= |parse_input_c1_~x~0#1.base| 0)) (= |parse_input_##fun~~TO~VOID_#in~#fp#1.base| |parse_input_#t~mem6#1.base|) (< |parse_input_~input#1.offset| (select |#length| |parse_input_~input#1.base|)) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (= (select |#valid| |parse_input_c1_~x~0#1.base|) 1) (= (select |#length| |parse_input_c1_~x~0#1.base|) 1) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (< ~global~0.base |#StackHeapBarrier|) (= ~global~0.offset 0) (<= 0 (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) (= |parse_input_#t~mem6#1.offset| |parse_input_##fun~~TO~VOID_#in~#fp#1.offset|) (<= (select (select |#memory_int| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 8)) ~state~0) (= |~#commands~0.offset| 0) (= |parse_input_~i~0#1| 0) (= |parse_input_#t~mem6#1.offset| (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4))) (not (= |parse_input_c1_~x~0#1.base| |parse_input_~input#1.base|)) (not (= |parse_input_c1_~x~0#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)))) (= |#NULL.offset| 0) (< (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)) (select |#length| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)))) (= |parse_input_#in~input#1.offset| 0) (< |parse_input_c1_~x~0#1.base| |#StackHeapBarrier|) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (= (select |#valid| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) 1) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 9) (select |#length| |~#commands~0.base|)) (or (not (= |parse_input_##fun~~TO~VOID_#in~#fp#1.offset| |#funAddr~c2.offset|)) (not (= |parse_input_##fun~~TO~VOID_#in~#fp#1.base| |#funAddr~c2.base|))) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:45:35,809 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:45:35,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:45:35,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-11-03 01:45:35,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629147598] [2022-11-03 01:45:35,809 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:45:35,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 01:45:35,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:45:35,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 01:45:35,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2022-11-03 01:45:35,811 INFO L87 Difference]: Start difference. First operand 521 states and 599 transitions. Second operand has 11 states, 10 states have (on average 6.7) internal successors, (67), 11 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-03 01:45:36,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:45:36,028 INFO L93 Difference]: Finished difference Result 575 states and 658 transitions. [2022-11-03 01:45:36,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 01:45:36,028 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 6.7) internal successors, (67), 11 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 62 [2022-11-03 01:45:36,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:45:36,031 INFO L225 Difference]: With dead ends: 575 [2022-11-03 01:45:36,031 INFO L226 Difference]: Without dead ends: 575 [2022-11-03 01:45:36,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 122 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=176, Invalid=1014, Unknown=0, NotChecked=0, Total=1190 [2022-11-03 01:45:36,032 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 58 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:45:36,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 203 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 116 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2022-11-03 01:45:36,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-11-03 01:45:36,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 520. [2022-11-03 01:45:36,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 481 states have (on average 1.1642411642411643) internal successors, (560), 497 states have internal predecessors, (560), 11 states have call successors, (11), 11 states have call predecessors, (11), 23 states have return successors, (26), 11 states have call predecessors, (26), 11 states have call successors, (26) [2022-11-03 01:45:36,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 597 transitions. [2022-11-03 01:45:36,042 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 597 transitions. Word has length 62 [2022-11-03 01:45:36,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:45:36,043 INFO L495 AbstractCegarLoop]: Abstraction has 520 states and 597 transitions. [2022-11-03 01:45:36,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 6.7) internal successors, (67), 11 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-03 01:45:36,043 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 597 transitions. [2022-11-03 01:45:36,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-03 01:45:36,045 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:45:36,045 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:45:36,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-03 01:45:36,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-11-03 01:45:36,271 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:45:36,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:45:36,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1831591415, now seen corresponding path program 1 times [2022-11-03 01:45:36,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:45:36,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242209172] [2022-11-03 01:45:36,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:36,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:45:36,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 01:45:36,299 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 01:45:36,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 01:45:36,349 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 01:45:36,350 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 01:45:36,351 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (19 of 20 remaining) [2022-11-03 01:45:36,353 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 20 remaining) [2022-11-03 01:45:36,353 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 20 remaining) [2022-11-03 01:45:36,353 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (16 of 20 remaining) [2022-11-03 01:45:36,354 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (15 of 20 remaining) [2022-11-03 01:45:36,354 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE (14 of 20 remaining) [2022-11-03 01:45:36,354 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE (13 of 20 remaining) [2022-11-03 01:45:36,354 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 20 remaining) [2022-11-03 01:45:36,355 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 20 remaining) [2022-11-03 01:45:36,355 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 20 remaining) [2022-11-03 01:45:36,355 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 20 remaining) [2022-11-03 01:45:36,355 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE (8 of 20 remaining) [2022-11-03 01:45:36,355 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE (7 of 20 remaining) [2022-11-03 01:45:36,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr12ASSERT_VIOLATIONMEMORY_FREE (6 of 20 remaining) [2022-11-03 01:45:36,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE (5 of 20 remaining) [2022-11-03 01:45:36,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr14ASSERT_VIOLATIONMEMORY_FREE (4 of 20 remaining) [2022-11-03 01:45:36,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr15ASSERT_VIOLATIONMEMORY_FREE (3 of 20 remaining) [2022-11-03 01:45:36,357 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE (2 of 20 remaining) [2022-11-03 01:45:36,357 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr17ASSERT_VIOLATIONMEMORY_FREE (1 of 20 remaining) [2022-11-03 01:45:36,357 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE (0 of 20 remaining) [2022-11-03 01:45:36,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-11-03 01:45:36,361 INFO L444 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 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] [2022-11-03 01:45:36,365 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 01:45:36,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 01:45:36 BoogieIcfgContainer [2022-11-03 01:45:36,433 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 01:45:36,434 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 01:45:36,434 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 01:45:36,434 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 01:45:36,435 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:40:08" (3/4) ... [2022-11-03 01:45:36,438 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 01:45:36,439 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 01:45:36,439 INFO L158 Benchmark]: Toolchain (without parser) took 328868.43ms. Allocated memory was 102.8MB in the beginning and 289.4MB in the end (delta: 186.6MB). Free memory was 62.5MB in the beginning and 89.9MB in the end (delta: -27.4MB). Peak memory consumption was 159.7MB. Max. memory is 16.1GB. [2022-11-03 01:45:36,439 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 102.8MB. Free memory is still 80.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 01:45:36,439 INFO L158 Benchmark]: CACSL2BoogieTranslator took 675.18ms. Allocated memory is still 102.8MB. Free memory was 62.3MB in the beginning and 68.5MB in the end (delta: -6.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-03 01:45:36,440 INFO L158 Benchmark]: Boogie Procedure Inliner took 64.84ms. Allocated memory is still 102.8MB. Free memory was 68.5MB in the beginning and 66.2MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 01:45:36,440 INFO L158 Benchmark]: Boogie Preprocessor took 43.15ms. Allocated memory is still 102.8MB. Free memory was 66.2MB in the beginning and 64.4MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 01:45:36,440 INFO L158 Benchmark]: RCFGBuilder took 576.79ms. Allocated memory is still 102.8MB. Free memory was 64.4MB in the beginning and 47.5MB in the end (delta: 17.0MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-11-03 01:45:36,440 INFO L158 Benchmark]: TraceAbstraction took 327494.04ms. Allocated memory was 102.8MB in the beginning and 289.4MB in the end (delta: 186.6MB). Free memory was 46.8MB in the beginning and 89.9MB in the end (delta: -43.1MB). Peak memory consumption was 144.8MB. Max. memory is 16.1GB. [2022-11-03 01:45:36,441 INFO L158 Benchmark]: Witness Printer took 4.89ms. Allocated memory is still 289.4MB. Free memory is still 89.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 01:45:36,441 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 102.8MB. Free memory is still 80.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 675.18ms. Allocated memory is still 102.8MB. Free memory was 62.3MB in the beginning and 68.5MB in the end (delta: -6.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 64.84ms. Allocated memory is still 102.8MB. Free memory was 68.5MB in the beginning and 66.2MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 43.15ms. Allocated memory is still 102.8MB. Free memory was 66.2MB in the beginning and 64.4MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 576.79ms. Allocated memory is still 102.8MB. Free memory was 64.4MB in the beginning and 47.5MB in the end (delta: 17.0MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 327494.04ms. Allocated memory was 102.8MB in the beginning and 289.4MB in the end (delta: 186.6MB). Free memory was 46.8MB in the beginning and 89.9MB in the end (delta: -43.1MB). Peak memory consumption was 144.8MB. Max. memory is 16.1GB. * Witness Printer took 4.89ms. Allocated memory is still 289.4MB. Free memory is still 89.9MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 721]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of strcmp at line 693, overapproximation of memtrack at line 721. Possible FailurePath: [L685] int state = STATE_1; [L686] char *global = 0; [L687-L690] const struct command commands[] = { {"c1",c1,STATE_1}, {"c2",c2,STATE_2} }; [L722] CALL parse_input("c1") VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, state=0] [L692] int i = 0; VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L692] COND TRUE i < 2 VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR commands[i].name VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L692] COND TRUE i < 2 VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] EXPR commands[i].name VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=2, input={3:0}, input={3:0}, state=0] [L692] COND FALSE !(i < 2) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=2, input={3:0}, input={3:0}, state=0] [L722] RET parse_input("c1") VAL [commands={6:0}, global={0:0}, state=0] [L723] CALL parse_input("c1") VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, state=0] [L692] int i = 0; VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L692] COND TRUE i < 2 VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] EXPR commands[i].name VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L692] COND TRUE i < 2 VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L693] EXPR commands[i].name VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=2, input={4:0}, input={4:0}, state=0] [L692] COND FALSE !(i < 2) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=2, input={4:0}, input={4:0}, state=0] [L723] RET parse_input("c1") VAL [commands={6:0}, global={0:0}, state=0] [L724] CALL parse_input("c2") VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, state=0] [L692] int i = 0; VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L692] COND TRUE i < 2 VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L693] EXPR commands[i].name VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L693] COND TRUE strcmp(commands[i].name,input) == 0 [L694] EXPR commands[i].state_needed VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].state_needed=0, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L694] COND TRUE state >= commands[i].state_needed [L695] EXPR commands[i].function [L695] CALL commands[i].function() [L702] char *x = (char *)malloc(sizeof(char)); [L703] COND FALSE !(!x) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, state=0, x={-3:0}] [L706] COND FALSE !(\read(*global)) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, state=0, x={-3:0}] [L709] global = x [L710] state = STATE_2 VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={-3:0}, state=1, x={-3:0}] [L695] RET commands[i].function() [L724] RET parse_input("c2") VAL [commands={6:0}, global={-3:0}, state=1] [L725] return 0; VAL [\result=0, commands={6:0}, global={-3:0}, state=1] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 717]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 717]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 717]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 58 locations, 20 error locations. Started 1 CEGAR loops. OverallTime: 327.3s, OverallIterations: 46, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 45.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 12678 SdHoareTripleChecker+Valid, 14.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 12677 mSDsluCounter, 12333 SdHoareTripleChecker+Invalid, 12.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 3276 IncrementalHoareTripleChecker+Unchecked, 10490 mSDsCounter, 1808 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12118 IncrementalHoareTripleChecker+Invalid, 17202 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1808 mSolverCounterUnsat, 2142 mSDtfsCounter, 12118 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4844 GetRequests, 3052 SyntacticMatches, 193 SemanticMatches, 1599 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31793 ImplicationChecksByTransitivity, 226.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=663occurred in iteration=43, InterpolantAutomatonStates: 715, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 45 MinimizatonAttempts, 3077 StatesRemovedByMinimization, 45 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 2.0s SatisfiabilityAnalysisTime, 35.4s InterpolantComputationTime, 3402 NumberOfCodeBlocks, 3394 NumberOfCodeBlocksAsserted, 96 NumberOfCheckSat, 3878 ConstructedInterpolants, 295 QuantifiedInterpolants, 40538 SizeOfPredicates, 179 NumberOfNonLiveVariables, 10159 ConjunctsInSsa, 760 ConjunctsInUnsatCore, 96 InterpolantComputations, 12 PerfectInterpolantSequences, 1409/2762 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 6.2s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 8, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 87, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 187, TOOLS_POST_TIME: 4.6s, TOOLS_POST_CALL_APPLICATIONS: 16, TOOLS_POST_CALL_TIME: 0.2s, TOOLS_POST_RETURN_APPLICATIONS: 8, TOOLS_POST_RETURN_TIME: 0.5s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 211, TOOLS_QUANTIFIERELIM_TIME: 5.3s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.4s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 320, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 21, DOMAIN_JOIN_TIME: 0.4s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 3, DOMAIN_WIDEN_TIME: 0.1s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 6, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 87, DOMAIN_ISBOTTOM_TIME: 0.3s, LOOP_SUMMARIZER_APPLICATIONS: 3, LOOP_SUMMARIZER_CACHE_MISSES: 3, LOOP_SUMMARIZER_OVERALL_TIME: 1.4s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 1.4s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 6, CALL_SUMMARIZER_APPLICATIONS: 8, CALL_SUMMARIZER_CACHE_MISSES: 3, CALL_SUMMARIZER_OVERALL_TIME: 1.2s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 1.2s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 1085, DAG_COMPRESSION_RETAINED_NODES: 238, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-03 01:45:36,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI --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 7c883b81b24ce5a721aa9a1ff13aef8a0d532ba87d9e130e470a0b88a1f8e93e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 01:45:39,118 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:45:39,122 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:45:39,156 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:45:39,157 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:45:39,158 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:45:39,160 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:45:39,162 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:45:39,165 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:45:39,166 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:45:39,167 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:45:39,169 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:45:39,170 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:45:39,171 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:45:39,173 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:45:39,174 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:45:39,176 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:45:39,177 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:45:39,179 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:45:39,182 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:45:39,193 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:45:39,194 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:45:39,196 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:45:39,197 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:45:39,202 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:45:39,203 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:45:39,203 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:45:39,204 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:45:39,205 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:45:39,207 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:45:39,207 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:45:39,208 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:45:39,209 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:45:39,210 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:45:39,212 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:45:39,212 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:45:39,213 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:45:39,214 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:45:39,214 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:45:39,216 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:45:39,217 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:45:39,218 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-03 01:45:39,249 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:45:39,252 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:45:39,254 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:45:39,255 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:45:39,256 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:45:39,259 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:45:39,259 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:45:39,260 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:45:39,260 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:45:39,260 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:45:39,261 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:45:39,262 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:45:39,264 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-03 01:45:39,264 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-03 01:45:39,264 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:45:39,264 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:45:39,265 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-03 01:45:39,265 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:45:39,265 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:45:39,265 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:45:39,266 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-03 01:45:39,266 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-03 01:45:39,266 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-03 01:45:39,267 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:45:39,267 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 01:45:39,267 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 01:45:39,267 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 01:45:39,268 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:45:39,268 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:45:39,268 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:45:39,268 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 01:45:39,269 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:45:39,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:45:39,269 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:45:39,270 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:45:39,270 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 01:45:39,270 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 01:45:39,271 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:45:39,271 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 01:45:39,271 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c883b81b24ce5a721aa9a1ff13aef8a0d532ba87d9e130e470a0b88a1f8e93e [2022-11-03 01:45:39,710 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:45:39,752 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:45:39,755 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:45:39,757 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:45:39,758 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:45:39,760 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2022-11-03 01:45:39,849 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/data/28faf4a55/4156d15d4d814896abf1cb1a4b5cd42c/FLAGc01551921 [2022-11-03 01:45:40,476 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:45:40,477 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2022-11-03 01:45:40,493 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/data/28faf4a55/4156d15d4d814896abf1cb1a4b5cd42c/FLAGc01551921 [2022-11-03 01:45:40,733 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/data/28faf4a55/4156d15d4d814896abf1cb1a4b5cd42c [2022-11-03 01:45:40,736 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:45:40,738 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:45:40,740 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:45:40,740 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:45:40,745 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:45:40,746 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:45:40" (1/1) ... [2022-11-03 01:45:40,747 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ab12486 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:45:40, skipping insertion in model container [2022-11-03 01:45:40,748 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:45:40" (1/1) ... [2022-11-03 01:45:40,757 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:45:40,822 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:45:41,380 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:45:41,402 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:45:41,475 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:45:41,530 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:45:41,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:45:41 WrapperNode [2022-11-03 01:45:41,531 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:45:41,532 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:45:41,532 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:45:41,533 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:45:41,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:45:41" (1/1) ... [2022-11-03 01:45:41,569 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:45:41" (1/1) ... [2022-11-03 01:45:41,612 INFO L138 Inliner]: procedures = 169, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 96 [2022-11-03 01:45:41,612 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:45:41,613 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:45:41,613 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:45:41,613 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:45:41,624 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:45:41" (1/1) ... [2022-11-03 01:45:41,625 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:45:41" (1/1) ... [2022-11-03 01:45:41,628 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:45:41" (1/1) ... [2022-11-03 01:45:41,629 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:45:41" (1/1) ... [2022-11-03 01:45:41,638 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:45:41" (1/1) ... [2022-11-03 01:45:41,642 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:45:41" (1/1) ... [2022-11-03 01:45:41,644 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:45:41" (1/1) ... [2022-11-03 01:45:41,646 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:45:41" (1/1) ... [2022-11-03 01:45:41,649 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:45:41,650 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:45:41,650 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:45:41,651 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:45:41,652 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:45:41" (1/1) ... [2022-11-03 01:45:41,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:45:41,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:45:41,687 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:45:41,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:45:41,769 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-11-03 01:45:41,770 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2022-11-03 01:45:41,770 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2022-11-03 01:45:41,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 01:45:41,771 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:45:41,771 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 01:45:41,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 01:45:41,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 01:45:41,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-03 01:45:41,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:45:41,771 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:45:41,924 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:45:41,927 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:45:42,386 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:45:42,394 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:45:42,402 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 01:45:42,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:45:42 BoogieIcfgContainer [2022-11-03 01:45:42,406 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:45:42,408 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:45:42,412 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:45:42,416 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:45:42,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:45:40" (1/3) ... [2022-11-03 01:45:42,417 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65ab4eed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:45:42, skipping insertion in model container [2022-11-03 01:45:42,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:45:41" (2/3) ... [2022-11-03 01:45:42,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65ab4eed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:45:42, skipping insertion in model container [2022-11-03 01:45:42,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:45:42" (3/3) ... [2022-11-03 01:45:42,423 INFO L112 eAbstractionObserver]: Analyzing ICFG bftpd_2.i [2022-11-03 01:45:42,445 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:45:42,445 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2022-11-03 01:45:42,534 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:45:42,542 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;@f4d3704, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:45:42,542 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-11-03 01:45:42,547 INFO L276 IsEmpty]: Start isEmpty. Operand has 61 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 56 states have internal predecessors, (64), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 01:45:42,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-03 01:45:42,555 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:45:42,556 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-03 01:45:42,557 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:45:42,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:45:42,563 INFO L85 PathProgramCache]: Analyzing trace with hash -772449407, now seen corresponding path program 1 times [2022-11-03 01:45:42,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:45:42,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1830820706] [2022-11-03 01:45:42,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:42,579 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:45:42,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:45:42,583 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:45:42,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 01:45:42,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:42,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:45:42,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:45:42,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:45:42,944 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:45:42,945 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:45:42,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1830820706] [2022-11-03 01:45:42,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1830820706] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:45:42,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:45:42,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-03 01:45:42,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57692156] [2022-11-03 01:45:42,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:45:42,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:45:42,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:45:42,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:45:42,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:45:42,992 INFO L87 Difference]: Start difference. First operand has 61 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 56 states have internal predecessors, (64), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 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) [2022-11-03 01:45:43,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:45:43,272 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2022-11-03 01:45:43,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:45:43,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 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 [2022-11-03 01:45:43,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:45:43,296 INFO L225 Difference]: With dead ends: 110 [2022-11-03 01:45:43,296 INFO L226 Difference]: Without dead ends: 106 [2022-11-03 01:45:43,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:45:43,309 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 52 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:45:43,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 101 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:45:43,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-03 01:45:43,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 84. [2022-11-03 01:45:43,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 57 states have (on average 1.7017543859649122) internal successors, (97), 76 states have internal predecessors, (97), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-03 01:45:43,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 110 transitions. [2022-11-03 01:45:43,397 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 110 transitions. Word has length 6 [2022-11-03 01:45:43,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:45:43,398 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 110 transitions. [2022-11-03 01:45:43,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 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) [2022-11-03 01:45:43,399 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 110 transitions. [2022-11-03 01:45:43,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-03 01:45:43,400 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:45:43,400 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-03 01:45:43,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:45:43,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:45:43,615 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:45:43,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:45:43,616 INFO L85 PathProgramCache]: Analyzing trace with hash -772449406, now seen corresponding path program 1 times [2022-11-03 01:45:43,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:45:43,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1768453254] [2022-11-03 01:45:43,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:43,619 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:45:43,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:45:43,620 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:45:43,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 01:45:43,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:43,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 01:45:43,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:45:43,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:45:43,829 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:45:43,830 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:45:43,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1768453254] [2022-11-03 01:45:43,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1768453254] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:45:43,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:45:43,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:45:43,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122493825] [2022-11-03 01:45:43,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:45:43,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:45:43,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:45:43,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:45:43,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:45:43,834 INFO L87 Difference]: Start difference. First operand 84 states and 110 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) [2022-11-03 01:45:44,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:45:44,165 INFO L93 Difference]: Finished difference Result 206 states and 278 transitions. [2022-11-03 01:45:44,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:45:44,167 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 [2022-11-03 01:45:44,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:45:44,170 INFO L225 Difference]: With dead ends: 206 [2022-11-03 01:45:44,170 INFO L226 Difference]: Without dead ends: 206 [2022-11-03 01:45:44,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:45:44,172 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 125 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:45:44,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 142 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:45:44,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-11-03 01:45:44,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 152. [2022-11-03 01:45:44,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 119 states have (on average 1.7394957983193278) internal successors, (207), 138 states have internal predecessors, (207), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-11-03 01:45:44,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 238 transitions. [2022-11-03 01:45:44,219 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 238 transitions. Word has length 6 [2022-11-03 01:45:44,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:45:44,220 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 238 transitions. [2022-11-03 01:45:44,221 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) [2022-11-03 01:45:44,222 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 238 transitions. [2022-11-03 01:45:44,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-03 01:45:44,223 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:45:44,223 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:45:44,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:45:44,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:45:44,437 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:45:44,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:45:44,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1823872140, now seen corresponding path program 1 times [2022-11-03 01:45:44,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:45:44,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1785181722] [2022-11-03 01:45:44,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:44,440 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:45:44,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:45:44,441 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:45:44,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 01:45:44,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:44,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:45:44,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:45:44,683 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 01:45:44,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:45:44,704 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:45:44,704 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:45:44,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1785181722] [2022-11-03 01:45:44,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1785181722] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:45:44,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:45:44,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:45:44,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95019863] [2022-11-03 01:45:44,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:45:44,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:45:44,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:45:44,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:45:44,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:45:44,714 INFO L87 Difference]: Start difference. First operand 152 states and 238 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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) [2022-11-03 01:45:45,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:45:45,105 INFO L93 Difference]: Finished difference Result 228 states and 325 transitions. [2022-11-03 01:45:45,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:45:45,107 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 7 [2022-11-03 01:45:45,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:45:45,109 INFO L225 Difference]: With dead ends: 228 [2022-11-03 01:45:45,109 INFO L226 Difference]: Without dead ends: 228 [2022-11-03 01:45:45,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:45:45,111 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 136 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:45:45,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 164 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:45:45,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-11-03 01:45:45,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 155. [2022-11-03 01:45:45,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 122 states have (on average 1.721311475409836) internal successors, (210), 141 states have internal predecessors, (210), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-11-03 01:45:45,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 241 transitions. [2022-11-03 01:45:45,136 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 241 transitions. Word has length 7 [2022-11-03 01:45:45,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:45:45,136 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 241 transitions. [2022-11-03 01:45:45,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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) [2022-11-03 01:45:45,137 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 241 transitions. [2022-11-03 01:45:45,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-03 01:45:45,137 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:45:45,138 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:45:45,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:45:45,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:45:45,355 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:45:45,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:45:45,356 INFO L85 PathProgramCache]: Analyzing trace with hash 705461537, now seen corresponding path program 1 times [2022-11-03 01:45:45,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:45:45,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2107275306] [2022-11-03 01:45:45,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:45,357 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:45:45,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:45:45,359 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:45:45,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 01:45:45,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:45,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:45:45,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:45:45,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 01:45:45,639 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 01:45:45,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:45:45,674 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:45:45,675 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:45:45,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2107275306] [2022-11-03 01:45:45,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2107275306] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:45:45,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:45:45,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:45:45,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806929739] [2022-11-03 01:45:45,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:45:45,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:45:45,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:45:45,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:45:45,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:45:45,687 INFO L87 Difference]: Start difference. First operand 155 states and 241 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2022-11-03 01:45:46,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:45:46,044 INFO L93 Difference]: Finished difference Result 208 states and 279 transitions. [2022-11-03 01:45:46,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:45:46,045 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 8 [2022-11-03 01:45:46,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:45:46,047 INFO L225 Difference]: With dead ends: 208 [2022-11-03 01:45:46,048 INFO L226 Difference]: Without dead ends: 208 [2022-11-03 01:45:46,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:45:46,049 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 128 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:45:46,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 190 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:45:46,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-11-03 01:45:46,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 155. [2022-11-03 01:45:46,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 122 states have (on average 1.7049180327868851) internal successors, (208), 141 states have internal predecessors, (208), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-11-03 01:45:46,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 239 transitions. [2022-11-03 01:45:46,079 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 239 transitions. Word has length 8 [2022-11-03 01:45:46,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:45:46,079 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 239 transitions. [2022-11-03 01:45:46,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2022-11-03 01:45:46,079 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 239 transitions. [2022-11-03 01:45:46,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 01:45:46,081 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:45:46,084 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:45:46,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:45:46,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:45:46,298 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:45:46,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:45:46,299 INFO L85 PathProgramCache]: Analyzing trace with hash 394471214, now seen corresponding path program 1 times [2022-11-03 01:45:46,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:45:46,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1496439075] [2022-11-03 01:45:46,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:46,301 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:45:46,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:45:46,302 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:45:46,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 01:45:46,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:46,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:45:46,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:45:46,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:45:46,473 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:45:46,473 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:45:46,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1496439075] [2022-11-03 01:45:46,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1496439075] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:45:46,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:45:46,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:45:46,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003754233] [2022-11-03 01:45:46,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:45:46,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:45:46,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:45:46,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:45:46,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:45:46,476 INFO L87 Difference]: Start difference. First operand 155 states and 239 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-11-03 01:45:46,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:45:46,708 INFO L93 Difference]: Finished difference Result 234 states and 321 transitions. [2022-11-03 01:45:46,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:45:46,709 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 9 [2022-11-03 01:45:46,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:45:46,711 INFO L225 Difference]: With dead ends: 234 [2022-11-03 01:45:46,711 INFO L226 Difference]: Without dead ends: 234 [2022-11-03 01:45:46,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:45:46,712 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 140 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:45:46,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 183 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:45:46,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-11-03 01:45:46,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 191. [2022-11-03 01:45:46,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 156 states have (on average 1.6538461538461537) internal successors, (258), 176 states have internal predecessors, (258), 9 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-11-03 01:45:46,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 289 transitions. [2022-11-03 01:45:46,749 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 289 transitions. Word has length 9 [2022-11-03 01:45:46,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:45:46,749 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 289 transitions. [2022-11-03 01:45:46,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-11-03 01:45:46,750 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 289 transitions. [2022-11-03 01:45:46,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-03 01:45:46,750 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:45:46,750 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:45:46,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:45:46,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:45:46,964 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:45:46,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:45:46,965 INFO L85 PathProgramCache]: Analyzing trace with hash -656294205, now seen corresponding path program 1 times [2022-11-03 01:45:46,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:45:46,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [515948227] [2022-11-03 01:45:46,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:46,966 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:45:46,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:45:46,967 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:45:46,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 01:45:47,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:47,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:45:47,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:45:47,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:45:47,156 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:45:47,157 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:45:47,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [515948227] [2022-11-03 01:45:47,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [515948227] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:45:47,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:45:47,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:45:47,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561906422] [2022-11-03 01:45:47,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:45:47,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:45:47,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:45:47,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:45:47,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:45:47,160 INFO L87 Difference]: Start difference. First operand 191 states and 289 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) [2022-11-03 01:45:47,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:45:47,459 INFO L93 Difference]: Finished difference Result 231 states and 304 transitions. [2022-11-03 01:45:47,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:45:47,460 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 10 [2022-11-03 01:45:47,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:45:47,461 INFO L225 Difference]: With dead ends: 231 [2022-11-03 01:45:47,462 INFO L226 Difference]: Without dead ends: 231 [2022-11-03 01:45:47,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:45:47,463 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 123 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:45:47,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 227 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:45:47,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-11-03 01:45:47,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 201. [2022-11-03 01:45:47,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 165 states have (on average 1.6424242424242423) internal successors, (271), 186 states have internal predecessors, (271), 9 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-11-03 01:45:47,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 302 transitions. [2022-11-03 01:45:47,484 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 302 transitions. Word has length 10 [2022-11-03 01:45:47,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:45:47,485 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 302 transitions. [2022-11-03 01:45:47,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) [2022-11-03 01:45:47,485 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 302 transitions. [2022-11-03 01:45:47,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-03 01:45:47,486 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:45:47,486 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:45:47,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 01:45:47,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:45:47,700 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:45:47,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:45:47,700 INFO L85 PathProgramCache]: Analyzing trace with hash 12795785, now seen corresponding path program 1 times [2022-11-03 01:45:47,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:45:47,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [603922010] [2022-11-03 01:45:47,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:47,701 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:45:47,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:45:47,703 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:45:47,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 01:45:47,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:47,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:45:47,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:45:48,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:45:48,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:45:48,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:45:48,780 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:45:48,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [603922010] [2022-11-03 01:45:48,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [603922010] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:45:48,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1051073435] [2022-11-03 01:45:48,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:48,780 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:45:48,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:45:48,787 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:45:48,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-03 01:45:48,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:48,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:45:48,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:45:49,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:45:49,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:45:49,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:45:49,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1051073435] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:45:49,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278243698] [2022-11-03 01:45:49,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:49,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:45:49,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:45:49,590 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:45:49,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 01:45:49,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:49,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:45:49,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:45:49,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:45:49,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:45:50,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:45:50,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278243698] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:45:50,246 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:45:50,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 6 [2022-11-03 01:45:50,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671271633] [2022-11-03 01:45:50,247 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:45:50,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:45:50,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:45:50,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:45:50,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:45:50,248 INFO L87 Difference]: Start difference. First operand 201 states and 302 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:45:51,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:45:51,025 INFO L93 Difference]: Finished difference Result 367 states and 495 transitions. [2022-11-03 01:45:51,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:45:51,026 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-03 01:45:51,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:45:51,028 INFO L225 Difference]: With dead ends: 367 [2022-11-03 01:45:51,029 INFO L226 Difference]: Without dead ends: 367 [2022-11-03 01:45:51,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:45:51,030 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 258 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:45:51,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 312 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 01:45:51,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-11-03 01:45:51,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 239. [2022-11-03 01:45:51,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 200 states have (on average 1.62) internal successors, (324), 224 states have internal predecessors, (324), 9 states have call successors, (9), 5 states have call predecessors, (9), 10 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2022-11-03 01:45:51,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 363 transitions. [2022-11-03 01:45:51,047 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 363 transitions. Word has length 14 [2022-11-03 01:45:51,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:45:51,047 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 363 transitions. [2022-11-03 01:45:51,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:45:51,048 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 363 transitions. [2022-11-03 01:45:51,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 01:45:51,048 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:45:51,049 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:45:51,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 01:45:51,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-11-03 01:45:51,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 01:45:51,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:45:51,663 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:45:51,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:45:51,664 INFO L85 PathProgramCache]: Analyzing trace with hash 396669285, now seen corresponding path program 1 times [2022-11-03 01:45:51,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:45:51,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2014887507] [2022-11-03 01:45:51,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:51,664 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:45:51,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:45:51,665 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:45:51,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 01:45:51,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:51,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:45:51,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:45:52,012 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 01:45:52,030 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:45:52,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:45:52,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:45:52,242 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:45:52,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2014887507] [2022-11-03 01:45:52,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2014887507] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:45:52,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [470537036] [2022-11-03 01:45:52,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:52,242 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:45:52,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:45:52,244 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:45:52,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-11-03 01:45:52,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:52,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:45:52,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:45:52,765 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 01:45:52,802 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:45:52,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:45:52,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:45:52,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [470537036] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:45:52,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036398350] [2022-11-03 01:45:52,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:52,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:45:52,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:45:52,922 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:45:52,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 01:45:53,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:53,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:45:53,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:45:53,484 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 01:45:53,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:45:53,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:45:54,072 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:45:54,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036398350] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:45:54,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:45:54,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 18 [2022-11-03 01:45:54,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139674015] [2022-11-03 01:45:54,073 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:45:54,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 01:45:54,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:45:54,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 01:45:54,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2022-11-03 01:45:54,075 INFO L87 Difference]: Start difference. First operand 239 states and 363 transitions. Second operand has 20 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:45:57,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:45:57,045 INFO L93 Difference]: Finished difference Result 601 states and 793 transitions. [2022-11-03 01:45:57,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-03 01:45:57,047 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-03 01:45:57,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:45:57,051 INFO L225 Difference]: With dead ends: 601 [2022-11-03 01:45:57,051 INFO L226 Difference]: Without dead ends: 601 [2022-11-03 01:45:57,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=351, Invalid=1131, Unknown=0, NotChecked=0, Total=1482 [2022-11-03 01:45:57,052 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 1335 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1335 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:45:57,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1335 Valid, 506 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 01:45:57,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2022-11-03 01:45:57,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 307. [2022-11-03 01:45:57,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 267 states have (on average 1.6254681647940075) internal successors, (434), 292 states have internal predecessors, (434), 9 states have call successors, (9), 5 states have call predecessors, (9), 11 states have return successors, (32), 9 states have call predecessors, (32), 9 states have call successors, (32) [2022-11-03 01:45:57,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 475 transitions. [2022-11-03 01:45:57,080 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 475 transitions. Word has length 15 [2022-11-03 01:45:57,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:45:57,081 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 475 transitions. [2022-11-03 01:45:57,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:45:57,081 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 475 transitions. [2022-11-03 01:45:57,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-03 01:45:57,082 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:45:57,083 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:45:57,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 01:45:57,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-11-03 01:45:57,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 01:45:57,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:45:57,704 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:45:57,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:45:57,704 INFO L85 PathProgramCache]: Analyzing trace with hash -588154008, now seen corresponding path program 1 times [2022-11-03 01:45:57,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:45:57,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1241734339] [2022-11-03 01:45:57,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:57,705 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:45:57,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:45:57,706 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:45:57,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 01:45:57,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:57,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:45:57,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:45:58,199 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 01:45:58,218 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 01:45:58,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:45:58,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:45:58,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:45:58,512 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:45:58,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1241734339] [2022-11-03 01:45:58,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1241734339] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:45:58,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1846614879] [2022-11-03 01:45:58,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:58,513 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:45:58,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:45:58,515 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:45:58,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-11-03 01:45:58,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:58,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:45:58,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:45:58,954 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 01:45:58,963 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 01:45:58,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:45:58,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:45:59,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:45:59,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1846614879] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:45:59,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405962759] [2022-11-03 01:45:59,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:59,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:45:59,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:45:59,103 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:45:59,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 01:45:59,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:59,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:45:59,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:45:59,702 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 01:45:59,710 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 01:45:59,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:45:59,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:46:00,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:46:00,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405962759] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:46:00,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:46:00,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 15 [2022-11-03 01:46:00,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276890367] [2022-11-03 01:46:00,344 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:46:00,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 01:46:00,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:46:00,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 01:46:00,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:46:00,346 INFO L87 Difference]: Start difference. First operand 307 states and 475 transitions. Second operand has 17 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:46:03,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:46:03,781 INFO L93 Difference]: Finished difference Result 830 states and 1133 transitions. [2022-11-03 01:46:03,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:46:03,782 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-03 01:46:03,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:46:03,786 INFO L225 Difference]: With dead ends: 830 [2022-11-03 01:46:03,787 INFO L226 Difference]: Without dead ends: 830 [2022-11-03 01:46:03,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=242, Invalid=750, Unknown=0, NotChecked=0, Total=992 [2022-11-03 01:46:03,788 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 1139 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1139 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:46:03,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1139 Valid, 628 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-03 01:46:03,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2022-11-03 01:46:03,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 422. [2022-11-03 01:46:03,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 375 states have (on average 1.6426666666666667) internal successors, (616), 403 states have internal predecessors, (616), 11 states have call successors, (11), 7 states have call predecessors, (11), 16 states have return successors, (48), 11 states have call predecessors, (48), 11 states have call successors, (48) [2022-11-03 01:46:03,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 675 transitions. [2022-11-03 01:46:03,830 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 675 transitions. Word has length 16 [2022-11-03 01:46:03,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:46:03,830 INFO L495 AbstractCegarLoop]: Abstraction has 422 states and 675 transitions. [2022-11-03 01:46:03,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:46:03,831 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 675 transitions. [2022-11-03 01:46:03,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-03 01:46:03,832 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:46:03,832 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:46:03,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 01:46:04,078 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-03 01:46:04,257 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2022-11-03 01:46:04,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:46:04,453 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:46:04,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:46:04,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1776199670, now seen corresponding path program 1 times [2022-11-03 01:46:04,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:46:04,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [970014285] [2022-11-03 01:46:04,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:04,454 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:46:04,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:46:04,455 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:46:04,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 01:46:04,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:04,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 01:46:04,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:04,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:46:04,618 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:46:04,618 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:46:04,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [970014285] [2022-11-03 01:46:04,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [970014285] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:46:04,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:46:04,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:46:04,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704899130] [2022-11-03 01:46:04,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:46:04,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:46:04,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:46:04,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:46:04,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:46:04,620 INFO L87 Difference]: Start difference. First operand 422 states and 675 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 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) [2022-11-03 01:46:04,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:46:04,673 INFO L93 Difference]: Finished difference Result 420 states and 622 transitions. [2022-11-03 01:46:04,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:46:04,673 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 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 18 [2022-11-03 01:46:04,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:46:04,678 INFO L225 Difference]: With dead ends: 420 [2022-11-03 01:46:04,678 INFO L226 Difference]: Without dead ends: 420 [2022-11-03 01:46:04,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:46:04,679 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 27 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:46:04,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 118 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:46:04,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-11-03 01:46:04,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 397. [2022-11-03 01:46:04,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 350 states have (on average 1.5742857142857143) internal successors, (551), 377 states have internal predecessors, (551), 11 states have call successors, (11), 8 states have call predecessors, (11), 16 states have return successors, (41), 11 states have call predecessors, (41), 11 states have call successors, (41) [2022-11-03 01:46:04,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 603 transitions. [2022-11-03 01:46:04,702 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 603 transitions. Word has length 18 [2022-11-03 01:46:04,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:46:04,702 INFO L495 AbstractCegarLoop]: Abstraction has 397 states and 603 transitions. [2022-11-03 01:46:04,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 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) [2022-11-03 01:46:04,703 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 603 transitions. [2022-11-03 01:46:04,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-03 01:46:04,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:46:04,704 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-03 01:46:04,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 01:46:04,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:46:04,919 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:46:04,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:46:04,919 INFO L85 PathProgramCache]: Analyzing trace with hash 323759248, now seen corresponding path program 2 times [2022-11-03 01:46:04,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:46:04,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1277928952] [2022-11-03 01:46:04,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:46:04,920 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:46:04,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:46:04,922 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:46:04,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 01:46:05,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:46:05,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:46:05,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:46:05,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:05,331 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:46:05,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:46:06,581 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:46:06,582 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:46:06,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1277928952] [2022-11-03 01:46:06,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1277928952] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:46:06,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [341132829] [2022-11-03 01:46:06,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:46:06,582 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:46:06,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:46:06,587 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:46:06,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-03 01:46:06,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:46:06,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:46:06,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:46:06,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:06,829 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:46:06,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:46:06,973 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:46:06,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [341132829] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:46:06,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504096503] [2022-11-03 01:46:06,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:46:06,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:46:06,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:46:06,983 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:46:06,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-03 01:46:07,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:46:07,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:46:07,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:46:07,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:07,118 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:46:07,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:46:07,169 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:46:07,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504096503] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:46:07,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:46:07,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 16 [2022-11-03 01:46:07,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968158095] [2022-11-03 01:46:07,170 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:46:07,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 01:46:07,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:46:07,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 01:46:07,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2022-11-03 01:46:07,171 INFO L87 Difference]: Start difference. First operand 397 states and 603 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:46:08,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:46:08,098 INFO L93 Difference]: Finished difference Result 495 states and 681 transitions. [2022-11-03 01:46:08,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 01:46:08,098 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-03 01:46:08,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:46:08,101 INFO L225 Difference]: With dead ends: 495 [2022-11-03 01:46:08,101 INFO L226 Difference]: Without dead ends: 495 [2022-11-03 01:46:08,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2022-11-03 01:46:08,102 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 512 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 01:46:08,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [512 Valid, 484 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 01:46:08,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-11-03 01:46:08,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 336. [2022-11-03 01:46:08,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 288 states have (on average 1.5104166666666667) internal successors, (435), 316 states have internal predecessors, (435), 11 states have call successors, (11), 8 states have call predecessors, (11), 17 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) [2022-11-03 01:46:08,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 482 transitions. [2022-11-03 01:46:08,117 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 482 transitions. Word has length 22 [2022-11-03 01:46:08,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:46:08,117 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 482 transitions. [2022-11-03 01:46:08,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:46:08,118 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 482 transitions. [2022-11-03 01:46:08,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-03 01:46:08,118 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:46:08,119 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:46:08,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-03 01:46:08,342 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-11-03 01:46:08,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-03 01:46:08,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:46:08,735 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:46:08,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:46:08,736 INFO L85 PathProgramCache]: Analyzing trace with hash 382694474, now seen corresponding path program 1 times [2022-11-03 01:46:08,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:46:08,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1731934812] [2022-11-03 01:46:08,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:08,736 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:46:08,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:46:08,737 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:46:08,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 01:46:08,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:08,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:46:08,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:08,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:46:08,821 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:46:08,822 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:46:08,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1731934812] [2022-11-03 01:46:08,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1731934812] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:46:08,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:46:08,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:46:08,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273956209] [2022-11-03 01:46:08,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:46:08,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:46:08,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:46:08,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:46:08,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:46:08,824 INFO L87 Difference]: Start difference. First operand 336 states and 482 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 01:46:08,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:46:08,831 INFO L93 Difference]: Finished difference Result 259 states and 362 transitions. [2022-11-03 01:46:08,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:46:08,831 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-11-03 01:46:08,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:46:08,834 INFO L225 Difference]: With dead ends: 259 [2022-11-03 01:46:08,834 INFO L226 Difference]: Without dead ends: 259 [2022-11-03 01:46:08,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:46:08,835 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 13 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:46:08,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 126 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:46:08,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-11-03 01:46:08,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2022-11-03 01:46:08,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 219 states have (on average 1.5068493150684932) internal successors, (330), 244 states have internal predecessors, (330), 8 states have call successors, (8), 6 states have call predecessors, (8), 12 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-11-03 01:46:08,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 362 transitions. [2022-11-03 01:46:08,848 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 362 transitions. Word has length 25 [2022-11-03 01:46:08,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:46:08,849 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 362 transitions. [2022-11-03 01:46:08,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 01:46:08,850 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 362 transitions. [2022-11-03 01:46:08,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-03 01:46:08,854 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:46:08,855 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:46:08,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 01:46:09,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:46:09,061 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:46:09,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:46:09,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1752183410, now seen corresponding path program 1 times [2022-11-03 01:46:09,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:46:09,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [974979023] [2022-11-03 01:46:09,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:09,062 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:46:09,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:46:09,067 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:46:09,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 01:46:09,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:09,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:46:09,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:11,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:11,578 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:46:11,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:46:11,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:46:16,425 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:46:16,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [974979023] [2022-11-03 01:46:16,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [974979023] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:46:16,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [234906245] [2022-11-03 01:46:16,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:16,426 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:46:16,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:46:16,433 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:46:16,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-11-03 01:46:16,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:16,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:46:16,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:19,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:19,021 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:46:19,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:46:19,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:46:21,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [234906245] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:46:21,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612373591] [2022-11-03 01:46:21,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:21,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:46:21,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:46:21,379 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:46:21,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-03 01:46:21,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:21,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:46:21,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:23,792 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 01:46:23,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 01:46:24,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:46:24,299 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 12 treesize of output 14 [2022-11-03 01:46:24,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:46:24,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:46:24,632 INFO L356 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-03 01:46:24,632 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-11-03 01:46:27,656 INFO L356 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-03 01:46:27,657 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-11-03 01:46:29,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:46:29,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612373591] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:46:29,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-11-03 01:46:29,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 4] total 12 [2022-11-03 01:46:29,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38741074] [2022-11-03 01:46:29,887 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-11-03 01:46:29,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 01:46:29,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:46:29,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 01:46:29,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=156, Unknown=4, NotChecked=0, Total=210 [2022-11-03 01:46:29,889 INFO L87 Difference]: Start difference. First operand 259 states and 362 transitions. Second operand has 14 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 01:46:57,451 WARN L234 SmtUtils]: Spent 12.39s on a formula simplification. DAG size of input: 35 DAG size of output: 35 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:47:02,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:47:02,206 INFO L93 Difference]: Finished difference Result 516 states and 654 transitions. [2022-11-03 01:47:02,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 01:47:02,207 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2022-11-03 01:47:02,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:47:02,210 INFO L225 Difference]: With dead ends: 516 [2022-11-03 01:47:02,210 INFO L226 Difference]: Without dead ends: 516 [2022-11-03 01:47:02,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 97 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 49.0s TimeCoverageRelationStatistics Valid=163, Invalid=424, Unknown=13, NotChecked=0, Total=600 [2022-11-03 01:47:02,211 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 452 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 294 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:47:02,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 463 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 178 Invalid, 0 Unknown, 294 Unchecked, 1.0s Time] [2022-11-03 01:47:02,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2022-11-03 01:47:02,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 323. [2022-11-03 01:47:02,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 279 states have (on average 1.4874551971326164) internal successors, (415), 306 states have internal predecessors, (415), 9 states have call successors, (9), 7 states have call predecessors, (9), 15 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2022-11-03 01:47:02,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 451 transitions. [2022-11-03 01:47:02,225 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 451 transitions. Word has length 27 [2022-11-03 01:47:02,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:47:02,226 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 451 transitions. [2022-11-03 01:47:02,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 01:47:02,226 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 451 transitions. [2022-11-03 01:47:02,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-03 01:47:02,227 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:47:02,228 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:47:02,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2022-11-03 01:47:02,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-03 01:47:02,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-03 01:47:02,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:47:02,831 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:47:02,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:47:02,832 INFO L85 PathProgramCache]: Analyzing trace with hash 2041807728, now seen corresponding path program 1 times [2022-11-03 01:47:02,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:47:02,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1505884516] [2022-11-03 01:47:02,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:02,832 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:47:02,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:47:02,833 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:47:02,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 01:47:02,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:02,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:47:02,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:03,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:47:03,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:47:03,398 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:47:03,398 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:47:03,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1505884516] [2022-11-03 01:47:03,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1505884516] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:47:03,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [183738148] [2022-11-03 01:47:03,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:03,399 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:47:03,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:47:03,401 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:47:03,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-11-03 01:47:03,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:03,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:47:03,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:03,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:47:03,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:47:03,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:47:03,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [183738148] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:47:03,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576510326] [2022-11-03 01:47:03,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:03,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:47:03,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:47:03,995 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:47:04,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-03 01:47:04,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:04,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:47:04,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:04,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:47:04,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:47:04,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:47:04,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576510326] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:47:04,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:47:04,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 7 [2022-11-03 01:47:04,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101808856] [2022-11-03 01:47:04,444 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:47:04,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:47:04,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:47:04,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:47:04,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:47:04,445 INFO L87 Difference]: Start difference. First operand 323 states and 451 transitions. Second operand has 9 states, 8 states have (on average 6.0) internal successors, (48), 6 states have internal predecessors, (48), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 01:47:05,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:47:05,063 INFO L93 Difference]: Finished difference Result 465 states and 591 transitions. [2022-11-03 01:47:05,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 01:47:05,064 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.0) internal successors, (48), 6 states have internal predecessors, (48), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2022-11-03 01:47:05,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:47:05,066 INFO L225 Difference]: With dead ends: 465 [2022-11-03 01:47:05,066 INFO L226 Difference]: Without dead ends: 465 [2022-11-03 01:47:05,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:47:05,067 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 311 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:47:05,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 247 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:47:05,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-11-03 01:47:05,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 392. [2022-11-03 01:47:05,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 346 states have (on average 1.4190751445086704) internal successors, (491), 373 states have internal predecessors, (491), 9 states have call successors, (9), 9 states have call predecessors, (9), 17 states have return successors, (25), 9 states have call predecessors, (25), 9 states have call successors, (25) [2022-11-03 01:47:05,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 525 transitions. [2022-11-03 01:47:05,080 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 525 transitions. Word has length 28 [2022-11-03 01:47:05,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:47:05,081 INFO L495 AbstractCegarLoop]: Abstraction has 392 states and 525 transitions. [2022-11-03 01:47:05,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.0) internal successors, (48), 6 states have internal predecessors, (48), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 01:47:05,081 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 525 transitions. [2022-11-03 01:47:05,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-03 01:47:05,082 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:47:05,083 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:47:05,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2022-11-03 01:47:05,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-03 01:47:05,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-03 01:47:05,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:47:05,695 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:47:05,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:47:05,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1128469823, now seen corresponding path program 1 times [2022-11-03 01:47:05,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:47:05,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2024544424] [2022-11-03 01:47:05,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:05,696 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:47:05,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:47:05,698 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:47:05,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-03 01:47:05,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:05,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:47:05,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:05,995 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:47:05,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:47:06,280 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:47:06,280 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:47:06,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2024544424] [2022-11-03 01:47:06,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2024544424] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:47:06,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [974147500] [2022-11-03 01:47:06,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:06,281 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:47:06,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:47:06,282 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:47:06,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-11-03 01:47:06,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:06,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:47:06,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:06,838 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:47:06,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:47:06,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [974147500] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:47:06,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:47:06,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 4] total 13 [2022-11-03 01:47:06,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032790725] [2022-11-03 01:47:06,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:47:06,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:47:06,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:47:06,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:47:06,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:47:06,841 INFO L87 Difference]: Start difference. First operand 392 states and 525 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 01:47:07,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:47:07,237 INFO L93 Difference]: Finished difference Result 500 states and 641 transitions. [2022-11-03 01:47:07,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:47:07,239 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-11-03 01:47:07,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:47:07,243 INFO L225 Difference]: With dead ends: 500 [2022-11-03 01:47:07,243 INFO L226 Difference]: Without dead ends: 500 [2022-11-03 01:47:07,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:47:07,244 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 151 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:47:07,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 194 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:47:07,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2022-11-03 01:47:07,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 413. [2022-11-03 01:47:07,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 367 states have (on average 1.4032697547683923) internal successors, (515), 394 states have internal predecessors, (515), 9 states have call successors, (9), 9 states have call predecessors, (9), 17 states have return successors, (25), 9 states have call predecessors, (25), 9 states have call successors, (25) [2022-11-03 01:47:07,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 549 transitions. [2022-11-03 01:47:07,258 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 549 transitions. Word has length 29 [2022-11-03 01:47:07,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:47:07,259 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 549 transitions. [2022-11-03 01:47:07,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 01:47:07,259 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 549 transitions. [2022-11-03 01:47:07,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-03 01:47:07,260 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:47:07,260 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:47:07,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2022-11-03 01:47:07,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-03 01:47:07,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:47:07,664 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:47:07,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:47:07,664 INFO L85 PathProgramCache]: Analyzing trace with hash -221078483, now seen corresponding path program 1 times [2022-11-03 01:47:07,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:47:07,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [399690472] [2022-11-03 01:47:07,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:07,665 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:47:07,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:47:07,666 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:47:07,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-03 01:47:07,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:07,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 01:47:07,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:10,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:10,472 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:47:10,669 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 01:47:10,673 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 01:47:10,725 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:47:10,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:47:13,162 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:47:13,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [399690472] [2022-11-03 01:47:13,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [399690472] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:47:13,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [996156967] [2022-11-03 01:47:13,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:13,163 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:47:13,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:47:13,164 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:47:13,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-11-03 01:47:13,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:13,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 01:47:13,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:18,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:18,015 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:47:18,112 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 01:47:18,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 01:47:18,143 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:47:18,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:47:20,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [996156967] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:47:20,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663398226] [2022-11-03 01:47:20,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:20,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:47:20,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:47:20,448 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:47:20,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-03 01:47:20,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:20,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 01:47:20,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:23,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:23,157 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:47:23,242 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 01:47:23,247 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 01:47:23,266 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:47:23,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:47:25,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663398226] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:47:25,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:47:25,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 7 [2022-11-03 01:47:25,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263144909] [2022-11-03 01:47:25,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:47:25,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:47:25,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:47:25,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:47:25,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=121, Unknown=3, NotChecked=0, Total=156 [2022-11-03 01:47:25,520 INFO L87 Difference]: Start difference. First operand 413 states and 549 transitions. Second operand has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 01:47:32,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:47:32,644 INFO L93 Difference]: Finished difference Result 495 states and 610 transitions. [2022-11-03 01:47:32,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 01:47:32,644 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-11-03 01:47:32,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:47:32,647 INFO L225 Difference]: With dead ends: 495 [2022-11-03 01:47:32,647 INFO L226 Difference]: Without dead ends: 495 [2022-11-03 01:47:32,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 90 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=113, Invalid=301, Unknown=6, NotChecked=0, Total=420 [2022-11-03 01:47:32,648 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 230 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:47:32,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 279 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 200 Invalid, 0 Unknown, 56 Unchecked, 0.7s Time] [2022-11-03 01:47:32,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-11-03 01:47:32,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 413. [2022-11-03 01:47:32,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 367 states have (on average 1.3950953678474114) internal successors, (512), 394 states have internal predecessors, (512), 9 states have call successors, (9), 9 states have call predecessors, (9), 17 states have return successors, (25), 9 states have call predecessors, (25), 9 states have call successors, (25) [2022-11-03 01:47:32,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 546 transitions. [2022-11-03 01:47:32,661 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 546 transitions. Word has length 29 [2022-11-03 01:47:32,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:47:32,661 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 546 transitions. [2022-11-03 01:47:32,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 01:47:32,662 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 546 transitions. [2022-11-03 01:47:32,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-03 01:47:32,662 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:47:32,662 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:47:32,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-03 01:47:32,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2022-11-03 01:47:33,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-03 01:47:33,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:47:33,278 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:47:33,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:47:33,278 INFO L85 PathProgramCache]: Analyzing trace with hash 740687428, now seen corresponding path program 1 times [2022-11-03 01:47:33,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:47:33,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1725545356] [2022-11-03 01:47:33,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:33,279 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:47:33,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:47:33,280 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:47:33,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-03 01:47:33,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:33,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:47:33,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:33,609 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 01:47:33,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:47:33,933 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 01:47:33,934 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:47:33,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1725545356] [2022-11-03 01:47:33,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1725545356] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:47:33,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1754956340] [2022-11-03 01:47:33,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:33,934 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:47:33,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:47:33,939 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:47:33,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-03 01:47:34,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:34,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:47:34,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:34,282 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 01:47:34,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:47:34,496 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 01:47:34,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1754956340] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:47:34,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208184360] [2022-11-03 01:47:34,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:34,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:47:34,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:47:34,499 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:47:34,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-03 01:47:34,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:34,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:47:34,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:34,750 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 01:47:34,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:47:34,982 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 01:47:34,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208184360] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:47:34,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:47:34,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 8 [2022-11-03 01:47:34,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465336111] [2022-11-03 01:47:34,983 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:47:34,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:47:34,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:47:34,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:47:34,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:47:34,985 INFO L87 Difference]: Start difference. First operand 413 states and 546 transitions. Second operand has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 01:47:35,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:47:35,829 INFO L93 Difference]: Finished difference Result 452 states and 565 transitions. [2022-11-03 01:47:35,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 01:47:35,830 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2022-11-03 01:47:35,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:47:35,832 INFO L225 Difference]: With dead ends: 452 [2022-11-03 01:47:35,832 INFO L226 Difference]: Without dead ends: 452 [2022-11-03 01:47:35,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2022-11-03 01:47:35,833 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 398 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:47:35,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [398 Valid, 309 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 01:47:35,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-11-03 01:47:35,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 423. [2022-11-03 01:47:35,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 376 states have (on average 1.375) internal successors, (517), 404 states have internal predecessors, (517), 9 states have call successors, (9), 9 states have call predecessors, (9), 18 states have return successors, (25), 9 states have call predecessors, (25), 9 states have call successors, (25) [2022-11-03 01:47:35,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 551 transitions. [2022-11-03 01:47:35,846 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 551 transitions. Word has length 31 [2022-11-03 01:47:35,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:47:35,846 INFO L495 AbstractCegarLoop]: Abstraction has 423 states and 551 transitions. [2022-11-03 01:47:35,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 01:47:35,847 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 551 transitions. [2022-11-03 01:47:35,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 01:47:35,848 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:47:35,848 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:47:35,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-03 01:47:36,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2022-11-03 01:47:36,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-03 01:47:36,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:47:36,463 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:47:36,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:47:36,464 INFO L85 PathProgramCache]: Analyzing trace with hash 753387604, now seen corresponding path program 1 times [2022-11-03 01:47:36,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:47:36,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1920351133] [2022-11-03 01:47:36,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:36,464 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:47:36,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:47:36,465 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:47:36,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-03 01:47:36,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:36,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:47:36,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:36,659 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:47:36,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:47:36,773 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:47:36,773 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:47:36,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1920351133] [2022-11-03 01:47:36,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1920351133] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:47:36,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [648518273] [2022-11-03 01:47:36,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:36,774 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:47:36,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:47:36,775 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:47:36,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-03 01:47:36,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:36,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:47:36,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:36,999 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:47:36,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:47:37,116 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:47:37,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [648518273] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:47:37,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914817021] [2022-11-03 01:47:37,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:37,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:47:37,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:47:37,118 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:47:37,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-03 01:47:37,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:37,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:47:37,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:37,290 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:47:37,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:47:37,398 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:47:37,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914817021] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:47:37,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:47:37,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 3 [2022-11-03 01:47:37,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666783569] [2022-11-03 01:47:37,399 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:47:37,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:47:37,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:47:37,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:47:37,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:47:37,401 INFO L87 Difference]: Start difference. First operand 423 states and 551 transitions. Second operand has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 01:47:37,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:47:37,446 INFO L93 Difference]: Finished difference Result 433 states and 557 transitions. [2022-11-03 01:47:37,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:47:37,446 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-11-03 01:47:37,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:47:37,449 INFO L225 Difference]: With dead ends: 433 [2022-11-03 01:47:37,449 INFO L226 Difference]: Without dead ends: 433 [2022-11-03 01:47:37,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:47:37,450 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 51 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:47:37,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 113 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:47:37,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2022-11-03 01:47:37,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 421. [2022-11-03 01:47:37,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 376 states have (on average 1.3590425531914894) internal successors, (511), 402 states have internal predecessors, (511), 9 states have call successors, (9), 9 states have call predecessors, (9), 18 states have return successors, (25), 9 states have call predecessors, (25), 9 states have call successors, (25) [2022-11-03 01:47:37,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 545 transitions. [2022-11-03 01:47:37,463 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 545 transitions. Word has length 40 [2022-11-03 01:47:37,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:47:37,463 INFO L495 AbstractCegarLoop]: Abstraction has 421 states and 545 transitions. [2022-11-03 01:47:37,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 01:47:37,464 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 545 transitions. [2022-11-03 01:47:37,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-03 01:47:37,464 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:47:37,465 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:47:37,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-03 01:47:37,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-03 01:47:37,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2022-11-03 01:47:38,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:47:38,079 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting parse_inputErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:47:38,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:47:38,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1556115366, now seen corresponding path program 1 times [2022-11-03 01:47:38,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:47:38,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2046594261] [2022-11-03 01:47:38,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:38,080 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:47:38,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:47:38,082 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:47:38,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-03 01:47:38,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:38,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 01:47:38,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:40,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:40,746 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:47:41,153 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:47:41,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:47:42,596 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:47:42,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2046594261] [2022-11-03 01:47:42,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2046594261] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:47:42,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [810845073] [2022-11-03 01:47:42,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:42,597 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:47:42,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:47:42,599 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:47:42,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-11-03 01:47:42,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:42,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 01:47:42,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:45,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:45,316 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:47:45,623 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:47:45,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:47:46,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [810845073] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:47:46,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709586386] [2022-11-03 01:47:46,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:46,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:47:46,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:47:46,447 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:47:46,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-03 01:47:46,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:46,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:47:46,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:48,878 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 01:47:48,879 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 01:47:49,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:47:49,404 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 12 treesize of output 14 [2022-11-03 01:47:49,682 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:47:49,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:47:50,516 INFO L356 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-03 01:47:50,517 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-11-03 01:47:53,456 INFO L356 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-03 01:47:53,456 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-11-03 01:47:55,657 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:47:55,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709586386] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:47:55,657 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-11-03 01:47:55,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 5] total 14 [2022-11-03 01:47:55,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694972250] [2022-11-03 01:47:55,658 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-11-03 01:47:55,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 01:47:55,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:47:55,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 01:47:55,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=210, Unknown=3, NotChecked=0, Total=272 [2022-11-03 01:47:55,659 INFO L87 Difference]: Start difference. First operand 421 states and 545 transitions. Second operand has 16 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 states have internal predecessors, (97), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 01:47:56,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:47:56,480 INFO L93 Difference]: Finished difference Result 517 states and 623 transitions. [2022-11-03 01:47:56,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 01:47:56,481 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 states have internal predecessors, (97), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 41 [2022-11-03 01:47:56,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:47:56,483 INFO L225 Difference]: With dead ends: 517 [2022-11-03 01:47:56,483 INFO L226 Difference]: Without dead ends: 517 [2022-11-03 01:47:56,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 182 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=123, Invalid=336, Unknown=3, NotChecked=0, Total=462 [2022-11-03 01:47:56,484 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 477 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:47:56,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [477 Valid, 223 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 130 Invalid, 0 Unknown, 135 Unchecked, 0.5s Time] [2022-11-03 01:47:56,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-11-03 01:47:56,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 416. [2022-11-03 01:47:56,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 376 states have (on average 1.273936170212766) internal successors, (479), 397 states have internal predecessors, (479), 9 states have call successors, (9), 9 states have call predecessors, (9), 18 states have return successors, (25), 9 states have call predecessors, (25), 9 states have call successors, (25) [2022-11-03 01:47:56,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 513 transitions. [2022-11-03 01:47:56,497 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 513 transitions. Word has length 41 [2022-11-03 01:47:56,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:47:56,498 INFO L495 AbstractCegarLoop]: Abstraction has 416 states and 513 transitions. [2022-11-03 01:47:56,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 states have internal predecessors, (97), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 01:47:56,498 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 513 transitions. [2022-11-03 01:47:56,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-03 01:47:56,499 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:47:56,499 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:47:56,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-03 01:47:56,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-11-03 01:47:56,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2022-11-03 01:47:57,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:47:57,127 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting parse_inputErr17ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:47:57,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:47:57,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1880179342, now seen corresponding path program 1 times [2022-11-03 01:47:57,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:47:57,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [118036808] [2022-11-03 01:47:57,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:57,129 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:47:57,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:47:57,130 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:47:57,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-03 01:47:57,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:57,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 01:47:57,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:57,545 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:47:57,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:47:57,744 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:47:57,744 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:47:57,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [118036808] [2022-11-03 01:47:57,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [118036808] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:47:57,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [205871690] [2022-11-03 01:47:57,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:57,745 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:47:57,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:47:57,746 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:47:57,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-11-03 01:47:57,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:57,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:47:57,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:58,010 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:47:58,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:47:58,169 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:47:58,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [205871690] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:47:58,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19522461] [2022-11-03 01:47:58,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:58,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:47:58,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:47:58,171 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:47:58,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-03 01:47:58,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:58,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:47:58,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:58,415 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:47:58,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:47:58,562 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:47:58,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19522461] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:47:58,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:47:58,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 6 [2022-11-03 01:47:58,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727994274] [2022-11-03 01:47:58,563 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:47:58,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:47:58,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:47:58,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:47:58,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:47:58,564 INFO L87 Difference]: Start difference. First operand 416 states and 513 transitions. Second operand has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 7 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 01:47:58,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:47:58,850 INFO L93 Difference]: Finished difference Result 375 states and 447 transitions. [2022-11-03 01:47:58,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:47:58,852 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 7 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2022-11-03 01:47:58,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:47:58,853 INFO L225 Difference]: With dead ends: 375 [2022-11-03 01:47:58,854 INFO L226 Difference]: Without dead ends: 375 [2022-11-03 01:47:58,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:47:58,855 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 77 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:47:58,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 213 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:47:58,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-11-03 01:47:58,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 348. [2022-11-03 01:47:58,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 315 states have (on average 1.2603174603174603) internal successors, (397), 331 states have internal predecessors, (397), 8 states have call successors, (8), 8 states have call predecessors, (8), 14 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-11-03 01:47:58,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 423 transitions. [2022-11-03 01:47:58,866 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 423 transitions. Word has length 41 [2022-11-03 01:47:58,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:47:58,866 INFO L495 AbstractCegarLoop]: Abstraction has 348 states and 423 transitions. [2022-11-03 01:47:58,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 7 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 01:47:58,867 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 423 transitions. [2022-11-03 01:47:58,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-03 01:47:58,867 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:47:58,868 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:47:58,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2022-11-03 01:47:59,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-11-03 01:47:59,280 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2022-11-03 01:47:59,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:47:59,470 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:47:59,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:47:59,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1843982442, now seen corresponding path program 1 times [2022-11-03 01:47:59,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:47:59,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1868319102] [2022-11-03 01:47:59,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:59,472 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:47:59,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:47:59,473 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:47:59,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-03 01:47:59,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:59,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:47:59,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:59,645 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 01:47:59,753 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:47:59,753 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 20 [2022-11-03 01:47:59,783 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:47:59,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:47:59,962 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:47:59,962 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:47:59,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1868319102] [2022-11-03 01:47:59,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1868319102] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:47:59,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1153024803] [2022-11-03 01:47:59,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:59,963 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:47:59,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:47:59,964 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:47:59,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2022-11-03 01:48:00,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:00,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:48:00,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:00,291 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 01:48:00,397 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:48:00,398 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 20 [2022-11-03 01:48:00,429 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:48:00,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:48:00,587 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:48:00,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1153024803] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:48:00,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140887707] [2022-11-03 01:48:00,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:00,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:48:00,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:48:00,589 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:48:00,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-03 01:48:00,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:00,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:48:00,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:00,703 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 01:48:00,812 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:48:00,812 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 27 [2022-11-03 01:48:00,831 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:48:00,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:48:00,988 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:48:00,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140887707] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:48:00,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:48:00,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 3 [2022-11-03 01:48:00,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351022853] [2022-11-03 01:48:00,989 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:48:00,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:48:00,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:48:00,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:48:00,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:48:00,990 INFO L87 Difference]: Start difference. First operand 348 states and 423 transitions. Second operand has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 01:48:01,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:01,238 INFO L93 Difference]: Finished difference Result 383 states and 454 transitions. [2022-11-03 01:48:01,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:48:01,238 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-11-03 01:48:01,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:01,240 INFO L225 Difference]: With dead ends: 383 [2022-11-03 01:48:01,240 INFO L226 Difference]: Without dead ends: 383 [2022-11-03 01:48:01,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 239 SyntacticMatches, 5 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:48:01,241 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 32 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:01,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 153 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:48:01,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-11-03 01:48:01,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 364. [2022-11-03 01:48:01,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 331 states have (on average 1.2477341389728096) internal successors, (413), 347 states have internal predecessors, (413), 8 states have call successors, (8), 8 states have call predecessors, (8), 14 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-11-03 01:48:01,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 439 transitions. [2022-11-03 01:48:01,251 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 439 transitions. Word has length 42 [2022-11-03 01:48:01,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:01,251 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 439 transitions. [2022-11-03 01:48:01,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 01:48:01,252 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 439 transitions. [2022-11-03 01:48:01,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-03 01:48:01,253 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:01,253 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:48:01,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-11-03 01:48:01,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-03 01:48:01,669 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (46)] Ended with exit code 0 [2022-11-03 01:48:01,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:48:01,868 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:48:01,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:01,868 INFO L85 PathProgramCache]: Analyzing trace with hash -639148643, now seen corresponding path program 1 times [2022-11-03 01:48:01,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:48:01,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1608765076] [2022-11-03 01:48:01,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:01,869 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:48:01,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:48:01,871 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:48:01,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-03 01:48:01,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:01,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:48:01,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:02,017 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 01:48:02,017 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:48:02,017 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:48:02,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1608765076] [2022-11-03 01:48:02,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1608765076] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:48:02,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:48:02,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:48:02,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044203122] [2022-11-03 01:48:02,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:48:02,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:48:02,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:48:02,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:48:02,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:48:02,020 INFO L87 Difference]: Start difference. First operand 364 states and 439 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 01:48:02,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:02,026 INFO L93 Difference]: Finished difference Result 304 states and 349 transitions. [2022-11-03 01:48:02,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:48:02,027 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-11-03 01:48:02,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:02,028 INFO L225 Difference]: With dead ends: 304 [2022-11-03 01:48:02,028 INFO L226 Difference]: Without dead ends: 304 [2022-11-03 01:48:02,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:48:02,028 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 4 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:02,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 96 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:48:02,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-11-03 01:48:02,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 289. [2022-11-03 01:48:02,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 264 states have (on average 1.1893939393939394) internal successors, (314), 274 states have internal predecessors, (314), 7 states have call successors, (7), 7 states have call predecessors, (7), 11 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-03 01:48:02,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 334 transitions. [2022-11-03 01:48:02,036 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 334 transitions. Word has length 47 [2022-11-03 01:48:02,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:02,037 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 334 transitions. [2022-11-03 01:48:02,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 01:48:02,037 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 334 transitions. [2022-11-03 01:48:02,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-03 01:48:02,038 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:02,038 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:48:02,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-11-03 01:48:02,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:48:02,239 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:48:02,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:02,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1433195828, now seen corresponding path program 1 times [2022-11-03 01:48:02,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:48:02,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1539374945] [2022-11-03 01:48:02,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:02,240 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:48:02,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:48:02,241 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:48:02,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-03 01:48:02,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:02,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 01:48:02,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:05,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:05,633 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:48:05,840 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 01:48:05,846 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 01:48:05,913 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 01:48:05,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:48:08,405 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:48:08,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1539374945] [2022-11-03 01:48:08,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1539374945] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:48:08,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [109876124] [2022-11-03 01:48:08,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:08,406 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:48:08,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:48:08,407 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:48:08,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2022-11-03 01:48:08,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:08,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 01:48:08,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:13,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:13,900 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:48:14,000 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 01:48:14,008 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 01:48:14,024 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 01:48:14,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:48:16,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [109876124] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:48:16,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529793441] [2022-11-03 01:48:16,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:16,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:48:16,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:48:16,314 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:48:16,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-11-03 01:48:16,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:16,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 01:48:16,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:19,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:48:19,478 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:48:19,562 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 01:48:19,567 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 01:48:19,586 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 01:48:19,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:48:21,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529793441] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:48:21,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:48:21,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 7 [2022-11-03 01:48:21,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920680207] [2022-11-03 01:48:21,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:48:21,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:48:21,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:48:21,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:48:21,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=121, Unknown=3, NotChecked=0, Total=156 [2022-11-03 01:48:21,841 INFO L87 Difference]: Start difference. First operand 289 states and 334 transitions. Second operand has 9 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 01:48:28,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:28,637 INFO L93 Difference]: Finished difference Result 323 states and 364 transitions. [2022-11-03 01:48:28,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 01:48:28,638 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 50 [2022-11-03 01:48:28,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:28,640 INFO L225 Difference]: With dead ends: 323 [2022-11-03 01:48:28,640 INFO L226 Difference]: Without dead ends: 323 [2022-11-03 01:48:28,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 153 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=113, Invalid=301, Unknown=6, NotChecked=0, Total=420 [2022-11-03 01:48:28,642 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 180 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:28,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 184 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 114 Invalid, 0 Unknown, 44 Unchecked, 0.4s Time] [2022-11-03 01:48:28,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-11-03 01:48:28,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 289. [2022-11-03 01:48:28,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 264 states have (on average 1.1856060606060606) internal successors, (313), 274 states have internal predecessors, (313), 7 states have call successors, (7), 7 states have call predecessors, (7), 11 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-03 01:48:28,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 333 transitions. [2022-11-03 01:48:28,651 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 333 transitions. Word has length 50 [2022-11-03 01:48:28,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:28,651 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 333 transitions. [2022-11-03 01:48:28,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 01:48:28,651 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 333 transitions. [2022-11-03 01:48:28,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-03 01:48:28,652 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:28,652 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:48:28,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (50)] Forceful destruction successful, exit code 0 [2022-11-03 01:48:28,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-11-03 01:48:29,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-11-03 01:48:29,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:48:29,257 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:48:29,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:29,257 INFO L85 PathProgramCache]: Analyzing trace with hash 825866446, now seen corresponding path program 1 times [2022-11-03 01:48:29,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:48:29,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1626734038] [2022-11-03 01:48:29,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:29,258 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:48:29,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:48:29,259 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:48:29,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-03 01:48:29,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:29,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:48:29,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:29,630 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-03 01:48:29,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:48:30,058 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-03 01:48:30,058 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:48:30,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1626734038] [2022-11-03 01:48:30,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1626734038] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:48:30,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [122210] [2022-11-03 01:48:30,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:30,059 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:48:30,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:48:30,060 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:48:30,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2022-11-03 01:48:30,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:30,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:48:30,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:30,611 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-03 01:48:30,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:48:31,088 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-03 01:48:31,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [122210] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:48:31,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753499200] [2022-11-03 01:48:31,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:31,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:48:31,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:48:31,091 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:48:31,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-11-03 01:48:31,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:31,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:48:31,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:31,439 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-03 01:48:31,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:48:31,801 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-03 01:48:31,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753499200] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:48:31,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:48:31,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 10 [2022-11-03 01:48:31,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842007033] [2022-11-03 01:48:31,802 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:48:31,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 01:48:31,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:48:31,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 01:48:31,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:48:31,804 INFO L87 Difference]: Start difference. First operand 289 states and 333 transitions. Second operand has 12 states, 11 states have (on average 4.0) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-03 01:48:32,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:32,607 INFO L93 Difference]: Finished difference Result 306 states and 343 transitions. [2022-11-03 01:48:32,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 01:48:32,608 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.0) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 51 [2022-11-03 01:48:32,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:32,610 INFO L225 Difference]: With dead ends: 306 [2022-11-03 01:48:32,610 INFO L226 Difference]: Without dead ends: 306 [2022-11-03 01:48:32,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2022-11-03 01:48:32,611 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 288 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:32,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 255 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:48:32,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-11-03 01:48:32,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 289. [2022-11-03 01:48:32,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 264 states have (on average 1.1742424242424243) internal successors, (310), 274 states have internal predecessors, (310), 7 states have call successors, (7), 7 states have call predecessors, (7), 11 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-03 01:48:32,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 330 transitions. [2022-11-03 01:48:32,620 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 330 transitions. Word has length 51 [2022-11-03 01:48:32,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:32,621 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 330 transitions. [2022-11-03 01:48:32,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.0) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-03 01:48:32,621 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 330 transitions. [2022-11-03 01:48:32,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-03 01:48:32,622 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:32,622 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:48:32,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (53)] Forceful destruction successful, exit code 0 [2022-11-03 01:48:32,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2022-11-03 01:48:33,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-11-03 01:48:33,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:48:33,226 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:48:33,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:33,226 INFO L85 PathProgramCache]: Analyzing trace with hash -563187969, now seen corresponding path program 1 times [2022-11-03 01:48:33,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:48:33,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1679992377] [2022-11-03 01:48:33,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:33,227 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:48:33,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:48:33,229 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:48:33,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-03 01:48:33,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:33,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 01:48:33,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:33,670 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 01:48:33,671 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 01:48:36,342 INFO L356 Elim1Store]: treesize reduction 34, result has 40.4 percent of original size [2022-11-03 01:48:36,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 4 case distinctions, treesize of input 22 treesize of output 38 [2022-11-03 01:48:36,379 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:48:36,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:48:36,537 INFO L356 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-03 01:48:36,538 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 123 [2022-11-03 01:48:39,743 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:48:39,743 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:48:39,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1679992377] [2022-11-03 01:48:39,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1679992377] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:48:39,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1756455025] [2022-11-03 01:48:39,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:39,744 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:48:39,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:48:39,745 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:48:39,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2022-11-03 01:48:40,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:40,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 01:48:40,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:40,330 INFO L356 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-11-03 01:48:40,330 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-11-03 01:48:40,678 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:48:40,679 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 27 [2022-11-03 01:48:40,772 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 01:48:40,772 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 24 [2022-11-03 01:48:40,929 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:48:40,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:48:41,059 INFO L356 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-03 01:48:41,059 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 63 [2022-11-03 01:48:52,883 INFO L356 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-03 01:48:52,883 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 123 [2022-11-03 01:48:53,244 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:48:53,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1756455025] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:48:53,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501939430] [2022-11-03 01:48:53,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:53,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:48:53,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:48:53,246 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:48:53,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-11-03 01:48:53,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:53,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:48:53,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:53,391 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 01:48:53,392 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 01:48:53,682 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:48:53,683 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 27 [2022-11-03 01:48:53,755 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 01:48:53,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 24 [2022-11-03 01:48:53,832 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:48:53,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:48:53,972 INFO L356 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-03 01:48:53,973 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 123 [2022-11-03 01:49:04,487 INFO L356 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-03 01:49:04,487 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 63 [2022-11-03 01:49:04,663 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:49:04,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501939430] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:49:04,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:49:04,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 10, 7, 8] total 31 [2022-11-03 01:49:04,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063783163] [2022-11-03 01:49:04,664 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:49:04,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-03 01:49:04,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:04,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-03 01:49:04,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=795, Unknown=9, NotChecked=0, Total=992 [2022-11-03 01:49:04,666 INFO L87 Difference]: Start difference. First operand 289 states and 330 transitions. Second operand has 32 states, 29 states have (on average 6.172413793103448) internal successors, (179), 30 states have internal predecessors, (179), 7 states have call successors, (11), 10 states have call predecessors, (11), 6 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-03 01:49:12,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:12,099 INFO L93 Difference]: Finished difference Result 320 states and 352 transitions. [2022-11-03 01:49:12,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-03 01:49:12,100 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 6.172413793103448) internal successors, (179), 30 states have internal predecessors, (179), 7 states have call successors, (11), 10 states have call predecessors, (11), 6 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) Word has length 51 [2022-11-03 01:49:12,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:12,102 INFO L225 Difference]: With dead ends: 320 [2022-11-03 01:49:12,102 INFO L226 Difference]: Without dead ends: 320 [2022-11-03 01:49:12,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 274 SyntacticMatches, 8 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 33.8s TimeCoverageRelationStatistics Valid=407, Invalid=1561, Unknown=12, NotChecked=0, Total=1980 [2022-11-03 01:49:12,103 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 480 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:12,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 377 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 231 Invalid, 0 Unknown, 153 Unchecked, 0.6s Time] [2022-11-03 01:49:12,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-11-03 01:49:12,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 287. [2022-11-03 01:49:12,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 264 states have (on average 1.1704545454545454) internal successors, (309), 272 states have internal predecessors, (309), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-03 01:49:12,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 327 transitions. [2022-11-03 01:49:12,111 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 327 transitions. Word has length 51 [2022-11-03 01:49:12,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:12,112 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 327 transitions. [2022-11-03 01:49:12,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 6.172413793103448) internal successors, (179), 30 states have internal predecessors, (179), 7 states have call successors, (11), 10 states have call predecessors, (11), 6 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-03 01:49:12,112 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 327 transitions. [2022-11-03 01:49:12,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 01:49:12,113 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:12,113 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:49:12,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:12,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (56)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:12,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:12,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:12,724 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:49:12,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:12,724 INFO L85 PathProgramCache]: Analyzing trace with hash -167943901, now seen corresponding path program 1 times [2022-11-03 01:49:12,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:12,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1219025277] [2022-11-03 01:49:12,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:12,725 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:12,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:12,726 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:12,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-03 01:49:12,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:12,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:49:12,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:13,162 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-03 01:49:13,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:49:13,652 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-03 01:49:13,652 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:13,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1219025277] [2022-11-03 01:49:13,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1219025277] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:49:13,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1311658432] [2022-11-03 01:49:13,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:13,653 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:49:13,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:49:13,655 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:49:13,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2022-11-03 01:49:13,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:13,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:49:13,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:14,159 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-03 01:49:14,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:49:14,575 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-03 01:49:14,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1311658432] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:49:14,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715084719] [2022-11-03 01:49:14,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:14,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:14,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:49:14,577 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:49:14,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-11-03 01:49:14,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:14,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:49:14,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:14,928 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-03 01:49:14,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:49:15,357 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-03 01:49:15,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715084719] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:49:15,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:49:15,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 8 [2022-11-03 01:49:15,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077489101] [2022-11-03 01:49:15,358 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:49:15,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:49:15,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:15,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:49:15,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:49:15,360 INFO L87 Difference]: Start difference. First operand 287 states and 327 transitions. Second operand has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 01:49:16,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:16,063 INFO L93 Difference]: Finished difference Result 301 states and 337 transitions. [2022-11-03 01:49:16,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 01:49:16,065 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2022-11-03 01:49:16,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:16,067 INFO L225 Difference]: With dead ends: 301 [2022-11-03 01:49:16,067 INFO L226 Difference]: Without dead ends: 301 [2022-11-03 01:49:16,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2022-11-03 01:49:16,068 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 209 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:16,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 187 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:49:16,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-11-03 01:49:16,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 286. [2022-11-03 01:49:16,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 264 states have (on average 1.1553030303030303) internal successors, (305), 271 states have internal predecessors, (305), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-03 01:49:16,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 323 transitions. [2022-11-03 01:49:16,077 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 323 transitions. Word has length 52 [2022-11-03 01:49:16,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:16,078 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 323 transitions. [2022-11-03 01:49:16,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 01:49:16,078 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 323 transitions. [2022-11-03 01:49:16,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 01:49:16,079 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:16,080 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:49:16,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (59)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:16,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:16,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:16,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:16,684 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:49:16,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:16,684 INFO L85 PathProgramCache]: Analyzing trace with hash -278957874, now seen corresponding path program 1 times [2022-11-03 01:49:16,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:16,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1633204786] [2022-11-03 01:49:16,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:16,685 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:16,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:16,686 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:16,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-03 01:49:16,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:16,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 01:49:16,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:17,337 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:49:17,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 27 [2022-11-03 01:49:20,410 INFO L356 Elim1Store]: treesize reduction 46, result has 40.3 percent of original size [2022-11-03 01:49:20,411 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 46 [2022-11-03 01:49:20,585 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 01:49:20,652 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:49:20,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:49:21,129 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:21,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1633204786] [2022-11-03 01:49:21,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1633204786] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:49:21,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1300331013] [2022-11-03 01:49:21,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:21,131 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:49:21,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:49:21,133 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:49:21,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (62)] Waiting until timeout for monitored process [2022-11-03 01:49:21,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:21,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 01:49:21,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:22,050 INFO L356 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-03 01:49:22,050 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 43 [2022-11-03 01:49:24,982 INFO L356 Elim1Store]: treesize reduction 68, result has 38.2 percent of original size [2022-11-03 01:49:24,983 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 62 [2022-11-03 01:49:25,225 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 01:49:25,304 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:49:25,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:49:26,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1300331013] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:49:26,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119579855] [2022-11-03 01:49:26,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:26,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:26,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:49:26,192 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:49:26,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-11-03 01:49:26,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:26,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 01:49:26,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:26,780 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 01:49:26,780 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 01:49:27,407 INFO L356 Elim1Store]: treesize reduction 34, result has 37.0 percent of original size [2022-11-03 01:49:27,407 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 35 [2022-11-03 01:49:27,514 INFO L356 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-03 01:49:27,514 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 32 [2022-11-03 01:49:27,738 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 01:49:27,747 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:49:27,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:49:27,920 INFO L356 Elim1Store]: treesize reduction 7, result has 50.0 percent of original size [2022-11-03 01:49:27,920 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 91 [2022-11-03 01:49:30,622 INFO L356 Elim1Store]: treesize reduction 7, result has 82.1 percent of original size [2022-11-03 01:49:30,622 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 115 [2022-11-03 01:49:31,711 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:49:31,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119579855] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:49:31,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-11-03 01:49:31,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 12, 13] total 39 [2022-11-03 01:49:31,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564039766] [2022-11-03 01:49:31,712 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-11-03 01:49:31,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-03 01:49:31,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:31,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-03 01:49:31,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1501, Unknown=2, NotChecked=0, Total=1722 [2022-11-03 01:49:31,714 INFO L87 Difference]: Start difference. First operand 286 states and 323 transitions. Second operand has 41 states, 36 states have (on average 3.6666666666666665) internal successors, (132), 33 states have internal predecessors, (132), 7 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-03 01:49:34,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:34,997 INFO L93 Difference]: Finished difference Result 304 states and 338 transitions. [2022-11-03 01:49:34,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-03 01:49:34,998 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 36 states have (on average 3.6666666666666665) internal successors, (132), 33 states have internal predecessors, (132), 7 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 52 [2022-11-03 01:49:34,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:35,000 INFO L225 Difference]: With dead ends: 304 [2022-11-03 01:49:35,000 INFO L226 Difference]: Without dead ends: 304 [2022-11-03 01:49:35,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 171 SyntacticMatches, 8 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=442, Invalid=2312, Unknown=2, NotChecked=0, Total=2756 [2022-11-03 01:49:35,002 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 297 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:35,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 673 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 561 Invalid, 0 Unknown, 153 Unchecked, 1.4s Time] [2022-11-03 01:49:35,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-11-03 01:49:35,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 286. [2022-11-03 01:49:35,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 264 states have (on average 1.1515151515151516) internal successors, (304), 271 states have internal predecessors, (304), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-03 01:49:35,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 322 transitions. [2022-11-03 01:49:35,011 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 322 transitions. Word has length 52 [2022-11-03 01:49:35,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:35,012 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 322 transitions. [2022-11-03 01:49:35,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 36 states have (on average 3.6666666666666665) internal successors, (132), 33 states have internal predecessors, (132), 7 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-03 01:49:35,012 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 322 transitions. [2022-11-03 01:49:35,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-03 01:49:35,013 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:35,013 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:49:35,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:35,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (62)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:35,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:35,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:49:35,615 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:49:35,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:35,616 INFO L85 PathProgramCache]: Analyzing trace with hash -57759457, now seen corresponding path program 1 times [2022-11-03 01:49:35,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:35,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [811166126] [2022-11-03 01:49:35,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:35,616 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:35,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:35,618 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:35,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-11-03 01:49:35,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:35,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 01:49:35,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:36,466 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 01:49:36,467 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:49:37,159 INFO L356 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2022-11-03 01:49:37,160 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-11-03 01:49:37,676 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 01:49:37,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:37,950 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:49:38,319 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 01:49:38,325 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 01:49:38,452 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 01:49:38,453 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 23 [2022-11-03 01:49:38,522 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:49:38,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:49:39,180 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-11-03 01:49:39,216 INFO L356 Elim1Store]: treesize reduction 7, result has 50.0 percent of original size [2022-11-03 01:49:39,217 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 01:49:39,346 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:39,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [811166126] [2022-11-03 01:49:39,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [811166126] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:49:39,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2043136363] [2022-11-03 01:49:39,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:39,347 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:49:39,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:49:39,348 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:49:39,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (65)] Waiting until timeout for monitored process [2022-11-03 01:49:39,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:39,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 01:49:39,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:40,398 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 01:49:40,398 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:49:40,861 INFO L356 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2022-11-03 01:49:40,861 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-11-03 01:49:41,299 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 01:49:41,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:41,488 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:49:41,706 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 01:49:41,715 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 01:49:41,747 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 01:49:41,748 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 23 [2022-11-03 01:49:41,755 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:49:41,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:49:42,036 INFO L356 Elim1Store]: treesize reduction 7, result has 50.0 percent of original size [2022-11-03 01:49:42,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 01:49:42,054 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-11-03 01:49:42,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2043136363] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:49:42,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360797262] [2022-11-03 01:49:42,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:42,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:42,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:49:42,179 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:49:42,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-11-03 01:49:42,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:42,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:49:42,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:43,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:49:43,167 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 17 treesize of output 19 [2022-11-03 01:49:43,192 INFO L356 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2022-11-03 01:49:43,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-11-03 01:49:43,640 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2022-11-03 01:49:43,645 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 01:49:43,764 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:49:43,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:49:44,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:49:44,248 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-03 01:49:44,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-11-03 01:49:46,823 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:49:46,823 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 47 [2022-11-03 01:49:47,146 INFO L356 Elim1Store]: treesize reduction 7, result has 82.1 percent of original size [2022-11-03 01:49:47,147 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 55 [2022-11-03 01:49:47,285 INFO L356 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-03 01:49:47,285 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 9 [2022-11-03 01:49:47,425 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:49:47,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360797262] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:49:47,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-11-03 01:49:47,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 8, 10] total 34 [2022-11-03 01:49:47,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669458706] [2022-11-03 01:49:47,427 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-11-03 01:49:47,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-03 01:49:47,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:47,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-03 01:49:47,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1286, Unknown=1, NotChecked=0, Total=1482 [2022-11-03 01:49:47,433 INFO L87 Difference]: Start difference. First operand 286 states and 322 transitions. Second operand has 35 states, 33 states have (on average 4.454545454545454) internal successors, (147), 31 states have internal predecessors, (147), 7 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-03 01:50:29,769 WARN L234 SmtUtils]: Spent 6.14s on a formula simplification that was a NOOP. DAG size: 34 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:50:30,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:30,538 INFO L93 Difference]: Finished difference Result 316 states and 348 transitions. [2022-11-03 01:50:30,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-03 01:50:30,539 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 4.454545454545454) internal successors, (147), 31 states have internal predecessors, (147), 7 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 53 [2022-11-03 01:50:30,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:30,541 INFO L225 Difference]: With dead ends: 316 [2022-11-03 01:50:30,541 INFO L226 Difference]: Without dead ends: 316 [2022-11-03 01:50:30,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 193 SyntacticMatches, 7 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1668 ImplicationChecksByTransitivity, 48.2s TimeCoverageRelationStatistics Valid=1152, Invalid=4843, Unknown=11, NotChecked=0, Total=6006 [2022-11-03 01:50:30,543 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 711 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 485 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:30,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [711 Valid, 478 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 232 Invalid, 0 Unknown, 485 Unchecked, 0.8s Time] [2022-11-03 01:50:30,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-11-03 01:50:30,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 286. [2022-11-03 01:50:30,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 264 states have (on average 1.1477272727272727) internal successors, (303), 271 states have internal predecessors, (303), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-03 01:50:30,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 321 transitions. [2022-11-03 01:50:30,550 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 321 transitions. Word has length 53 [2022-11-03 01:50:30,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:30,551 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 321 transitions. [2022-11-03 01:50:30,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 4.454545454545454) internal successors, (147), 31 states have internal predecessors, (147), 7 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-03 01:50:30,552 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 321 transitions. [2022-11-03 01:50:30,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-03 01:50:30,553 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:30,553 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:50:30,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (65)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:30,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (64)] Ended with exit code 0 [2022-11-03 01:50:30,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:31,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:50:31,158 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:50:31,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:31,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1790543120, now seen corresponding path program 1 times [2022-11-03 01:50:31,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:31,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1108801707] [2022-11-03 01:50:31,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:31,159 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:31,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:31,160 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:31,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-11-03 01:50:31,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:31,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 01:50:31,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:31,564 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:50:31,565 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 27 [2022-11-03 01:50:34,125 INFO L356 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-03 01:50:34,125 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 case distinctions, treesize of input 29 treesize of output 43 [2022-11-03 01:50:34,253 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:34,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:50:36,585 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:36,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1108801707] [2022-11-03 01:50:36,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1108801707] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:50:36,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [674439952] [2022-11-03 01:50:36,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:36,586 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:50:36,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:50:36,587 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:50:36,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (68)] Waiting until timeout for monitored process [2022-11-03 01:50:37,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:37,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 01:50:37,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:41,625 INFO L356 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-03 01:50:41,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 43 [2022-11-03 01:50:48,243 INFO L356 Elim1Store]: treesize reduction 44, result has 37.1 percent of original size [2022-11-03 01:50:48,243 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 43 [2022-11-03 01:50:48,448 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:48,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:50:50,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [674439952] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:50:50,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331479681] [2022-11-03 01:50:50,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:50,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:50:50,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:50:50,659 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:50:50,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-11-03 01:50:50,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:50,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 01:50:50,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:52,980 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:50:52,980 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 27 [2022-11-03 01:50:55,535 INFO L356 Elim1Store]: treesize reduction 34, result has 40.4 percent of original size [2022-11-03 01:50:55,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 4 case distinctions, treesize of input 22 treesize of output 38 [2022-11-03 01:50:55,596 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:55,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:51:01,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331479681] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:51:01,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:51:01,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-11-03 01:51:01,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123724301] [2022-11-03 01:51:01,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:51:01,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-03 01:51:01,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:51:01,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-03 01:51:01,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=543, Unknown=10, NotChecked=0, Total=650 [2022-11-03 01:51:01,912 INFO L87 Difference]: Start difference. First operand 286 states and 321 transitions. Second operand has 21 states, 17 states have (on average 4.352941176470588) internal successors, (74), 15 states have internal predecessors, (74), 5 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-03 01:51:33,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:33,620 INFO L93 Difference]: Finished difference Result 316 states and 347 transitions. [2022-11-03 01:51:33,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-03 01:51:33,620 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 4.352941176470588) internal successors, (74), 15 states have internal predecessors, (74), 5 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 54 [2022-11-03 01:51:33,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:33,621 INFO L225 Difference]: With dead ends: 316 [2022-11-03 01:51:33,621 INFO L226 Difference]: Without dead ends: 316 [2022-11-03 01:51:33,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 169 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 58.3s TimeCoverageRelationStatistics Valid=483, Invalid=1752, Unknown=21, NotChecked=0, Total=2256 [2022-11-03 01:51:33,623 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 346 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 825 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 248 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:33,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 825 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 520 Invalid, 0 Unknown, 248 Unchecked, 1.3s Time] [2022-11-03 01:51:33,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-11-03 01:51:33,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 254. [2022-11-03 01:51:33,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 235 states have (on average 1.1404255319148937) internal successors, (268), 241 states have internal predecessors, (268), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-03 01:51:33,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 283 transitions. [2022-11-03 01:51:33,632 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 283 transitions. Word has length 54 [2022-11-03 01:51:33,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:33,633 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 283 transitions. [2022-11-03 01:51:33,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 4.352941176470588) internal successors, (74), 15 states have internal predecessors, (74), 5 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-03 01:51:33,633 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 283 transitions. [2022-11-03 01:51:33,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 01:51:33,634 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:33,634 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:51:33,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-11-03 01:51:33,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (68)] Forceful destruction successful, exit code 0 [2022-11-03 01:51:34,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (67)] Forceful destruction successful, exit code 0 [2022-11-03 01:51:34,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:51:34,251 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:51:34,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:34,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1294554201, now seen corresponding path program 1 times [2022-11-03 01:51:34,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:51:34,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [10636198] [2022-11-03 01:51:34,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:34,253 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:51:34,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:51:34,254 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:51:34,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-03 01:51:34,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:34,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 01:51:34,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:35,038 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:51:35,038 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 27 [2022-11-03 01:51:37,897 INFO L356 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-03 01:51:37,898 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 case distinctions, treesize of input 29 treesize of output 43 [2022-11-03 01:51:38,222 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 01:51:38,272 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:51:38,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:51:41,003 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:51:41,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [10636198] [2022-11-03 01:51:41,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [10636198] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:51:41,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [545783964] [2022-11-03 01:51:41,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:41,003 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:51:41,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:51:41,004 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:51:41,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (71)] Waiting until timeout for monitored process [2022-11-03 01:51:41,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:41,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 01:51:41,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:46,170 INFO L356 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-03 01:51:46,170 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 43 [2022-11-03 01:51:53,378 INFO L356 Elim1Store]: treesize reduction 44, result has 37.1 percent of original size [2022-11-03 01:51:53,378 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 43 [2022-11-03 01:51:53,855 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 01:51:53,947 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:51:53,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:51:56,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [545783964] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:51:56,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383557192] [2022-11-03 01:51:56,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:56,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:51:56,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:51:56,332 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:51:56,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-11-03 01:51:56,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:56,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 01:51:56,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:58,934 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:51:58,935 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 27 [2022-11-03 01:52:01,787 INFO L356 Elim1Store]: treesize reduction 34, result has 40.4 percent of original size [2022-11-03 01:52:01,788 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 4 case distinctions, treesize of input 22 treesize of output 38 [2022-11-03 01:52:02,003 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 01:52:02,008 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:02,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:52:12,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383557192] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:52:12,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:52:12,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-11-03 01:52:12,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419412189] [2022-11-03 01:52:12,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:52:12,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-03 01:52:12,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:12,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-03 01:52:12,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=741, Unknown=13, NotChecked=0, Total=870 [2022-11-03 01:52:12,454 INFO L87 Difference]: Start difference. First operand 254 states and 283 transitions. Second operand has 23 states, 19 states have (on average 4.526315789473684) internal successors, (86), 19 states have internal predecessors, (86), 5 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-03 01:52:21,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:21,538 INFO L93 Difference]: Finished difference Result 468 states and 511 transitions. [2022-11-03 01:52:21,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-03 01:52:21,539 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 4.526315789473684) internal successors, (86), 19 states have internal predecessors, (86), 5 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 60 [2022-11-03 01:52:21,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:21,541 INFO L225 Difference]: With dead ends: 468 [2022-11-03 01:52:21,541 INFO L226 Difference]: Without dead ends: 468 [2022-11-03 01:52:21,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 191 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 40.4s TimeCoverageRelationStatistics Valid=457, Invalid=1978, Unknown=15, NotChecked=0, Total=2450 [2022-11-03 01:52:21,543 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 452 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:21,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 736 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 669 Invalid, 0 Unknown, 203 Unchecked, 1.7s Time] [2022-11-03 01:52:21,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-11-03 01:52:21,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 336. [2022-11-03 01:52:21,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 311 states have (on average 1.1414790996784565) internal successors, (355), 319 states have internal predecessors, (355), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-11-03 01:52:21,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 377 transitions. [2022-11-03 01:52:21,555 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 377 transitions. Word has length 60 [2022-11-03 01:52:21,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:21,555 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 377 transitions. [2022-11-03 01:52:21,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 4.526315789473684) internal successors, (86), 19 states have internal predecessors, (86), 5 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-03 01:52:21,556 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 377 transitions. [2022-11-03 01:52:21,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-03 01:52:21,557 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:21,557 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:52:21,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (70)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:21,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (71)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:21,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:22,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:52:22,171 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:52:22,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:22,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1476474522, now seen corresponding path program 1 times [2022-11-03 01:52:22,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:22,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1400166108] [2022-11-03 01:52:22,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:22,172 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:22,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:22,173 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:22,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-11-03 01:52:22,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:22,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 01:52:22,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:23,017 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 01:52:23,018 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:52:23,707 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 01:52:23,963 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 01:52:23,964 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:52:25,346 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 01:52:25,355 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 01:52:25,592 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:52:25,592 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 69 [2022-11-03 01:52:25,740 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:25,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:52:26,628 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-11-03 01:52:26,772 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:26,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1400166108] [2022-11-03 01:52:26,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1400166108] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:52:26,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1471192457] [2022-11-03 01:52:26,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:26,773 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:52:26,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:52:26,774 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:52:26,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (74)] Waiting until timeout for monitored process [2022-11-03 01:52:27,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:27,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 01:52:27,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:28,640 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 01:52:28,641 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 24 [2022-11-03 01:52:28,695 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 01:52:28,695 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:52:33,764 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 01:52:34,132 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 01:52:34,132 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:52:34,156 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:52:34,156 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-03 01:52:35,174 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 01:52:35,183 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 01:52:35,383 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 01:52:35,383 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 23 [2022-11-03 01:52:35,514 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:35,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:52:35,884 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-11-03 01:52:37,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1471192457] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:52:37,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198352416] [2022-11-03 01:52:37,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:37,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:52:37,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:52:37,976 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:52:37,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-11-03 01:52:38,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:38,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 01:52:38,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:38,619 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 01:52:38,619 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:52:39,158 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 01:52:39,334 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 01:52:39,334 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:52:40,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 01:52:40,285 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 01:52:40,403 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:52:40,404 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 69 [2022-11-03 01:52:40,460 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:40,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:52:40,773 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-11-03 01:52:40,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198352416] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:52:40,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:52:40,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2022-11-03 01:52:40,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634321912] [2022-11-03 01:52:40,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:52:40,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-03 01:52:40,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:40,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-03 01:52:40,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1068, Unknown=2, NotChecked=0, Total=1190 [2022-11-03 01:52:40,882 INFO L87 Difference]: Start difference. First operand 336 states and 377 transitions. Second operand has 28 states, 25 states have (on average 4.48) internal successors, (112), 23 states have internal predecessors, (112), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-03 01:52:53,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:53,414 INFO L93 Difference]: Finished difference Result 405 states and 452 transitions. [2022-11-03 01:52:53,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 01:52:53,415 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 4.48) internal successors, (112), 23 states have internal predecessors, (112), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 61 [2022-11-03 01:52:53,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:53,416 INFO L225 Difference]: With dead ends: 405 [2022-11-03 01:52:53,416 INFO L226 Difference]: Without dead ends: 405 [2022-11-03 01:52:53,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 191 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=232, Invalid=1924, Unknown=6, NotChecked=0, Total=2162 [2022-11-03 01:52:53,417 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 249 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 607 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:53,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 492 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 113 Invalid, 0 Unknown, 607 Unchecked, 0.4s Time] [2022-11-03 01:52:53,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-11-03 01:52:53,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 346. [2022-11-03 01:52:53,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 321 states have (on average 1.1401869158878504) internal successors, (366), 329 states have internal predecessors, (366), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-11-03 01:52:53,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 388 transitions. [2022-11-03 01:52:53,427 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 388 transitions. Word has length 61 [2022-11-03 01:52:53,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:53,427 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 388 transitions. [2022-11-03 01:52:53,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 4.48) internal successors, (112), 23 states have internal predecessors, (112), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-03 01:52:53,428 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 388 transitions. [2022-11-03 01:52:53,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 01:52:53,429 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:53,429 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:52:53,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (74)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:53,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:53,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (73)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:54,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:54,034 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:52:54,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:54,035 INFO L85 PathProgramCache]: Analyzing trace with hash 785046953, now seen corresponding path program 1 times [2022-11-03 01:52:54,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:54,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1542899705] [2022-11-03 01:52:54,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:54,036 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:54,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:54,037 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:54,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2022-11-03 01:52:54,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:54,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:52:54,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:54,847 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-11-03 01:52:55,092 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 21 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:55,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:52:55,713 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2022-11-03 01:52:55,806 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:55,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1542899705] [2022-11-03 01:52:55,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1542899705] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:52:55,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1064087739] [2022-11-03 01:52:55,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:55,807 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:52:55,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:52:55,811 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:52:55,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (77)] Waiting until timeout for monitored process [2022-11-03 01:52:56,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:56,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:52:56,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:56,929 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2022-11-03 01:52:56,995 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 01:52:56,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:52:57,184 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 01:52:57,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1064087739] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 01:52:57,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:52:57,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 5] total 20 [2022-11-03 01:52:57,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361022292] [2022-11-03 01:52:57,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:57,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:52:57,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:57,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:52:57,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-11-03 01:52:57,193 INFO L87 Difference]: Start difference. First operand 346 states and 388 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 01:52:57,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:57,676 INFO L93 Difference]: Finished difference Result 366 states and 398 transitions. [2022-11-03 01:52:57,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:52:57,678 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 63 [2022-11-03 01:52:57,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:57,679 INFO L225 Difference]: With dead ends: 366 [2022-11-03 01:52:57,680 INFO L226 Difference]: Without dead ends: 366 [2022-11-03 01:52:57,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:52:57,681 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 169 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:57,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 87 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:52:57,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-11-03 01:52:57,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 333. [2022-11-03 01:52:57,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 309 states have (on average 1.110032362459547) internal successors, (343), 316 states have internal predecessors, (343), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-11-03 01:52:57,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 365 transitions. [2022-11-03 01:52:57,691 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 365 transitions. Word has length 63 [2022-11-03 01:52:57,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:57,691 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 365 transitions. [2022-11-03 01:52:57,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 01:52:57,692 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 365 transitions. [2022-11-03 01:52:57,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-03 01:52:57,693 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:57,693 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:52:57,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (77)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:57,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (76)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:58,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:58,097 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:52:58,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:58,098 INFO L85 PathProgramCache]: Analyzing trace with hash 586619876, now seen corresponding path program 1 times [2022-11-03 01:52:58,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:58,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [92985106] [2022-11-03 01:52:58,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:58,099 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:58,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:58,100 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:58,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2022-11-03 01:52:58,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:58,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 01:52:58,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:58,318 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 01:52:58,725 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:52:58,726 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 22 treesize of output 27 [2022-11-03 01:52:58,822 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:52:58,823 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 20 [2022-11-03 01:52:58,852 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 28 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:58,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:52:59,465 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 39 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:59,465 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:59,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [92985106] [2022-11-03 01:52:59,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [92985106] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:52:59,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1137573815] [2022-11-03 01:52:59,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:59,466 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:52:59,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:52:59,467 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:52:59,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (79)] Waiting until timeout for monitored process [2022-11-03 01:53:00,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:00,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 01:53:00,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:00,066 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 01:53:00,369 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:53:00,369 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 22 treesize of output 27 [2022-11-03 01:53:00,442 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:53:00,443 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 20 [2022-11-03 01:53:00,473 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 28 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:00,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:53:01,017 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 39 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:01,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1137573815] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:53:01,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147515781] [2022-11-03 01:53:01,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:01,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:53:01,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:53:01,020 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:53:01,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-11-03 01:53:01,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:01,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 01:53:01,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:01,161 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 01:53:01,457 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:53:01,457 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 22 treesize of output 27 [2022-11-03 01:53:01,546 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:53:01,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 27 [2022-11-03 01:53:01,567 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 28 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:01,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:53:02,138 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 39 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:02,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147515781] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:53:02,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:53:02,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7, 6, 7, 6] total 10 [2022-11-03 01:53:02,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512681552] [2022-11-03 01:53:02,139 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:53:02,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 01:53:02,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:02,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 01:53:02,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:53:02,141 INFO L87 Difference]: Start difference. First operand 333 states and 365 transitions. Second operand has 11 states, 10 states have (on average 8.3) internal successors, (83), 11 states have internal predecessors, (83), 2 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-03 01:53:02,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:02,541 INFO L93 Difference]: Finished difference Result 383 states and 419 transitions. [2022-11-03 01:53:02,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 01:53:02,542 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 8.3) internal successors, (83), 11 states have internal predecessors, (83), 2 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 66 [2022-11-03 01:53:02,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:02,544 INFO L225 Difference]: With dead ends: 383 [2022-11-03 01:53:02,544 INFO L226 Difference]: Without dead ends: 383 [2022-11-03 01:53:02,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 368 SyntacticMatches, 15 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-11-03 01:53:02,545 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 75 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:02,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 168 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 83 Invalid, 0 Unknown, 59 Unchecked, 0.3s Time] [2022-11-03 01:53:02,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-11-03 01:53:02,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 335. [2022-11-03 01:53:02,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 311 states have (on average 1.1061093247588425) internal successors, (344), 318 states have internal predecessors, (344), 8 states have call successors, (8), 8 states have call predecessors, (8), 14 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-11-03 01:53:02,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 367 transitions. [2022-11-03 01:53:02,555 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 367 transitions. Word has length 66 [2022-11-03 01:53:02,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:02,555 INFO L495 AbstractCegarLoop]: Abstraction has 335 states and 367 transitions. [2022-11-03 01:53:02,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 8.3) internal successors, (83), 11 states have internal predecessors, (83), 2 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-03 01:53:02,556 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 367 transitions. [2022-11-03 01:53:02,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 01:53:02,557 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:02,557 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:53:02,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:02,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (78)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:02,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (79)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:03,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:53:03,174 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:53:03,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:03,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1008566956, now seen corresponding path program 1 times [2022-11-03 01:53:03,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:03,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1992460318] [2022-11-03 01:53:03,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:03,176 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:03,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:03,176 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:03,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2022-11-03 01:53:03,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:03,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:53:03,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:03,537 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2022-11-03 01:53:03,537 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:53:03,537 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:53:03,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1992460318] [2022-11-03 01:53:03,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1992460318] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:53:03,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:53:03,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:53:03,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326714409] [2022-11-03 01:53:03,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:53:03,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:53:03,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:03,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:53:03,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:53:03,539 INFO L87 Difference]: Start difference. First operand 335 states and 367 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:53:03,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:03,665 INFO L93 Difference]: Finished difference Result 343 states and 374 transitions. [2022-11-03 01:53:03,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:53:03,666 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 67 [2022-11-03 01:53:03,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:03,668 INFO L225 Difference]: With dead ends: 343 [2022-11-03 01:53:03,668 INFO L226 Difference]: Without dead ends: 334 [2022-11-03 01:53:03,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:53:03,669 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 11 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:03,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 69 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:53:03,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-11-03 01:53:03,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 326. [2022-11-03 01:53:03,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 302 states have (on average 1.099337748344371) internal successors, (332), 309 states have internal predecessors, (332), 8 states have call successors, (8), 8 states have call predecessors, (8), 14 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-11-03 01:53:03,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 355 transitions. [2022-11-03 01:53:03,678 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 355 transitions. Word has length 67 [2022-11-03 01:53:03,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:03,679 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 355 transitions. [2022-11-03 01:53:03,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:53:03,679 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 355 transitions. [2022-11-03 01:53:03,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 01:53:03,681 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:03,681 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:53:03,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (81)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:03,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:53:03,895 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-03 01:53:03,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:03,895 INFO L85 PathProgramCache]: Analyzing trace with hash 272552823, now seen corresponding path program 1 times [2022-11-03 01:53:03,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:03,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1022415156] [2022-11-03 01:53:03,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:03,896 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:03,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:03,896 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:03,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2022-11-03 01:53:04,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 01:53:04,107 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 01:53:04,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 01:53:04,351 INFO L130 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2022-11-03 01:53:04,352 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 01:53:04,353 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (19 of 20 remaining) [2022-11-03 01:53:04,355 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 20 remaining) [2022-11-03 01:53:04,355 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 20 remaining) [2022-11-03 01:53:04,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (16 of 20 remaining) [2022-11-03 01:53:04,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (15 of 20 remaining) [2022-11-03 01:53:04,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE (14 of 20 remaining) [2022-11-03 01:53:04,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE (13 of 20 remaining) [2022-11-03 01:53:04,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 20 remaining) [2022-11-03 01:53:04,357 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 20 remaining) [2022-11-03 01:53:04,357 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 20 remaining) [2022-11-03 01:53:04,357 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 20 remaining) [2022-11-03 01:53:04,357 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE (8 of 20 remaining) [2022-11-03 01:53:04,357 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE (7 of 20 remaining) [2022-11-03 01:53:04,357 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr12ASSERT_VIOLATIONMEMORY_FREE (6 of 20 remaining) [2022-11-03 01:53:04,358 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE (5 of 20 remaining) [2022-11-03 01:53:04,358 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr14ASSERT_VIOLATIONMEMORY_FREE (4 of 20 remaining) [2022-11-03 01:53:04,358 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr15ASSERT_VIOLATIONMEMORY_FREE (3 of 20 remaining) [2022-11-03 01:53:04,358 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE (2 of 20 remaining) [2022-11-03 01:53:04,358 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr17ASSERT_VIOLATIONMEMORY_FREE (1 of 20 remaining) [2022-11-03 01:53:04,359 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE (0 of 20 remaining) [2022-11-03 01:53:04,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (82)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:04,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:53:04,562 INFO L444 BasicCegarLoop]: Path program histogram: [2, 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] [2022-11-03 01:53:04,565 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 01:53:04,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 01:53:04 BoogieIcfgContainer [2022-11-03 01:53:04,631 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 01:53:04,631 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 01:53:04,632 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 01:53:04,632 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 01:53:04,632 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:45:42" (3/4) ... [2022-11-03 01:53:04,635 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 01:53:04,635 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 01:53:04,636 INFO L158 Benchmark]: Toolchain (without parser) took 443898.00ms. Allocated memory was 73.4MB in the beginning and 107.0MB in the end (delta: 33.6MB). Free memory was 47.4MB in the beginning and 68.9MB in the end (delta: -21.5MB). Peak memory consumption was 11.2MB. Max. memory is 16.1GB. [2022-11-03 01:53:04,636 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 54.5MB. Free memory was 33.9MB in the beginning and 33.9MB in the end (delta: 69.8kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 01:53:04,636 INFO L158 Benchmark]: CACSL2BoogieTranslator took 791.32ms. Allocated memory is still 73.4MB. Free memory was 47.2MB in the beginning and 46.0MB in the end (delta: 1.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-03 01:53:04,637 INFO L158 Benchmark]: Boogie Procedure Inliner took 80.37ms. Allocated memory is still 73.4MB. Free memory was 45.8MB in the beginning and 43.4MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 01:53:04,637 INFO L158 Benchmark]: Boogie Preprocessor took 36.58ms. Allocated memory is still 73.4MB. Free memory was 43.4MB in the beginning and 41.6MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 01:53:04,637 INFO L158 Benchmark]: RCFGBuilder took 755.87ms. Allocated memory is still 73.4MB. Free memory was 41.6MB in the beginning and 42.2MB in the end (delta: -567.2kB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-03 01:53:04,637 INFO L158 Benchmark]: TraceAbstraction took 442222.76ms. Allocated memory was 73.4MB in the beginning and 107.0MB in the end (delta: 33.6MB). Free memory was 41.5MB in the beginning and 69.9MB in the end (delta: -28.4MB). Peak memory consumption was 53.7MB. Max. memory is 16.1GB. [2022-11-03 01:53:04,640 INFO L158 Benchmark]: Witness Printer took 4.06ms. Allocated memory is still 107.0MB. Free memory was 69.9MB in the beginning and 68.9MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 01:53:04,641 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 54.5MB. Free memory was 33.9MB in the beginning and 33.9MB in the end (delta: 69.8kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 791.32ms. Allocated memory is still 73.4MB. Free memory was 47.2MB in the beginning and 46.0MB in the end (delta: 1.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 80.37ms. Allocated memory is still 73.4MB. Free memory was 45.8MB in the beginning and 43.4MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 36.58ms. Allocated memory is still 73.4MB. Free memory was 43.4MB in the beginning and 41.6MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 755.87ms. Allocated memory is still 73.4MB. Free memory was 41.6MB in the beginning and 42.2MB in the end (delta: -567.2kB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 442222.76ms. Allocated memory was 73.4MB in the beginning and 107.0MB in the end (delta: 33.6MB). Free memory was 41.5MB in the beginning and 69.9MB in the end (delta: -28.4MB). Peak memory consumption was 53.7MB. Max. memory is 16.1GB. * Witness Printer took 4.06ms. Allocated memory is still 107.0MB. Free memory was 69.9MB in the beginning and 68.9MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 721]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of strcmp at line 693, overapproximation of memtrack at line 721. Possible FailurePath: [L685] int state = STATE_1; [L686] char *global = 0; [L687-L690] const struct command commands[] = { {"c1",c1,STATE_1}, {"c2",c2,STATE_2} }; VAL [commands={6:0}, global={0:0}, state=0] [L722] CALL parse_input("c1") VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, global={0:0}, state=0] [L692] int i = 0; VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L692] COND TRUE i < 2 VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR commands[i].name VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L692] COND TRUE i < 2 VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] EXPR commands[i].name VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, global={0:0}, i=2, input={3:0}, input={3:0}, state=0] [L692] COND FALSE !(i < 2) VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, global={0:0}, i=2, input={3:0}, input={3:0}, state=0] [L722] RET parse_input("c1") VAL [commands={6:0}, global={0:0}, state=0] [L723] CALL parse_input("c1") VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, global={0:0}, state=0] [L692] int i = 0; VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L692] COND TRUE i < 2 VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] EXPR commands[i].name VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L692] COND TRUE i < 2 VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L693] EXPR commands[i].name VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, global={0:0}, i=2, input={4:0}, input={4:0}, state=0] [L692] COND FALSE !(i < 2) VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, global={0:0}, i=2, input={4:0}, input={4:0}, state=0] [L723] RET parse_input("c1") VAL [commands={6:0}, global={0:0}, state=0] [L724] CALL parse_input("c2") VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, global={0:0}, state=0] [L692] int i = 0; VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L692] COND TRUE i < 2 VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L693] EXPR commands[i].name VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L693] COND TRUE strcmp(commands[i].name,input) == 0 [L694] EXPR commands[i].state_needed VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, commands[i].state_needed=0, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L694] COND TRUE state >= commands[i].state_needed [L695] EXPR commands[i].function VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, commands[i].function={-1:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L695] CALL commands[i].function() [L702] char *x = (char *)malloc(sizeof(char)); [L703] COND FALSE !(!x) VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, global={0:0}, state=0, x={7:0}] [L706] COND FALSE !(\read(*global)) VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, global={0:0}, state=0, x={7:0}] [L709] global = x [L710] state = STATE_2 VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, global={7:0}, state=1, x={7:0}] [L695] RET commands[i].function() [L724] RET parse_input("c2") VAL [commands={6:0}, global={7:0}, state=1] [L725] return 0; VAL [\result=0, commands={6:0}, global={7:0}, state=1] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 717]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 717]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 717]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 61 locations, 20 error locations. Started 1 CEGAR loops. OverallTime: 442.1s, OverallIterations: 35, TraceHistogramMax: 6, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 169.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9638 SdHoareTripleChecker+Valid, 19.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 9638 mSDsluCounter, 10002 SdHoareTripleChecker+Invalid, 16.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2437 IncrementalHoareTripleChecker+Unchecked, 7904 mSDsCounter, 967 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5762 IncrementalHoareTripleChecker+Invalid, 9166 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 967 mSolverCounterUnsat, 2098 mSDtfsCounter, 5762 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5187 GetRequests, 4480 SyntacticMatches, 70 SemanticMatches, 637 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 6243 ImplicationChecksByTransitivity, 327.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=423occurred in iteration=17, InterpolantAutomatonStates: 418, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 34 MinimizatonAttempts, 2414 StatesRemovedByMinimization, 33 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.9s SsaConstructionTime, 8.6s SatisfiabilityAnalysisTime, 240.5s InterpolantComputationTime, 3142 NumberOfCodeBlocks, 3142 NumberOfCodeBlocksAsserted, 84 NumberOfCheckSat, 4622 ConstructedInterpolants, 468 QuantifiedInterpolants, 58728 SizeOfPredicates, 384 NumberOfNonLiveVariables, 12344 ConjunctsInSsa, 1052 ConjunctsInUnsatCore, 125 InterpolantComputations, 12 PerfectInterpolantSequences, 1878/3294 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-03 01:53:04,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25e7a205-215d-4f83-bcd6-84953ce5e89f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample