./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstpcpy-alloca-1.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_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/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_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstpcpy-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/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_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/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 f22afdea3888c472e42c0b4bee511704d4ceb9c1e2d9f4db0ce5ffbd6de758f0 --- 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 01:35:47,080 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:35:47,084 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:35:47,114 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:35:47,115 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:35:47,116 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:35:47,117 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:35:47,119 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:35:47,121 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:35:47,122 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:35:47,123 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:35:47,124 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:35:47,125 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:35:47,126 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:35:47,127 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:35:47,132 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:35:47,133 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:35:47,137 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:35:47,139 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:35:47,142 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:35:47,149 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:35:47,150 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:35:47,155 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:35:47,156 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:35:47,159 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:35:47,166 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:35:47,166 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:35:47,167 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:35:47,168 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:35:47,169 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:35:47,169 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:35:47,172 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:35:47,172 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:35:47,174 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:35:47,175 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:35:47,176 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:35:47,178 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:35:47,179 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:35:47,179 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:35:47,180 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:35:47,181 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:35:47,182 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-03 01:35:47,222 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:35:47,222 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:35:47,223 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:35:47,223 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:35:47,224 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:35:47,225 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:35:47,225 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:35:47,225 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:35:47,225 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:35:47,226 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:35:47,227 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:35:47,227 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:35:47,227 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:35:47,228 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:35:47,228 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:35:47,228 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:35:47,228 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:35:47,229 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:35:47,230 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-03 01:35:47,230 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-03 01:35:47,230 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:35:47,230 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:35:47,231 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-03 01:35:47,231 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:35:47,231 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:35:47,231 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:35:47,232 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-03 01:35:47,232 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-03 01:35:47,232 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-03 01:35:47,233 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:35:47,233 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 01:35:47,233 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:35:47,233 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:35:47,233 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:35:47,234 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:35:47,234 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:35:47,234 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:35:47,234 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:35:47,235 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:35:47,235 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:35:47,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:35:47,235 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:35:47,236 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_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f22afdea3888c472e42c0b4bee511704d4ceb9c1e2d9f4db0ce5ffbd6de758f0 [2022-11-03 01:35:47,571 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:35:47,613 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:35:47,627 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:35:47,628 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:35:47,629 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:35:47,630 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/array-memsafety/openbsd_cstpcpy-alloca-1.i [2022-11-03 01:35:47,720 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/data/42a1f2afe/8123c4bd88c84d37a918462bb7df9a49/FLAG3832f4157 [2022-11-03 01:35:48,409 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:35:48,409 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/sv-benchmarks/c/array-memsafety/openbsd_cstpcpy-alloca-1.i [2022-11-03 01:35:48,422 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/data/42a1f2afe/8123c4bd88c84d37a918462bb7df9a49/FLAG3832f4157 [2022-11-03 01:35:48,702 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/data/42a1f2afe/8123c4bd88c84d37a918462bb7df9a49 [2022-11-03 01:35:48,711 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:35:48,712 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:35:48,718 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:35:48,718 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:35:48,722 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:35:48,723 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:35:48" (1/1) ... [2022-11-03 01:35:48,725 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64b0e4d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:35:48, skipping insertion in model container [2022-11-03 01:35:48,725 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:35:48" (1/1) ... [2022-11-03 01:35:48,733 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:35:48,796 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:35:49,251 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:35:49,261 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:35:49,323 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:35:49,360 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:35:49,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:35:49 WrapperNode [2022-11-03 01:35:49,361 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:35:49,363 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:35:49,363 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:35:49,364 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:35:49,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:35:49" (1/1) ... [2022-11-03 01:35:49,398 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:35:49" (1/1) ... [2022-11-03 01:35:49,429 INFO L138 Inliner]: procedures = 117, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2022-11-03 01:35:49,430 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:35:49,431 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:35:49,431 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:35:49,432 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:35:49,441 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:35:49" (1/1) ... [2022-11-03 01:35:49,441 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:35:49" (1/1) ... [2022-11-03 01:35:49,459 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:35:49" (1/1) ... [2022-11-03 01:35:49,460 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:35:49" (1/1) ... [2022-11-03 01:35:49,465 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:35:49" (1/1) ... [2022-11-03 01:35:49,476 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:35:49" (1/1) ... [2022-11-03 01:35:49,478 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:35:49" (1/1) ... [2022-11-03 01:35:49,484 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:35:49" (1/1) ... [2022-11-03 01:35:49,487 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:35:49,490 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:35:49,497 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:35:49,497 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:35:49,498 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:35:49" (1/1) ... [2022-11-03 01:35:49,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:35:49,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:35:49,533 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:35:49,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:35:49,578 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 01:35:49,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 01:35:49,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 01:35:49,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 01:35:49,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:35:49,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:35:49,706 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:35:49,709 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:35:49,871 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:35:49,936 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:35:49,951 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-03 01:35:49,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:35:49 BoogieIcfgContainer [2022-11-03 01:35:49,955 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:35:49,958 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:35:49,959 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:35:49,962 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:35:49,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:35:48" (1/3) ... [2022-11-03 01:35:49,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d31cf7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:35:49, skipping insertion in model container [2022-11-03 01:35:49,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:35:49" (2/3) ... [2022-11-03 01:35:49,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d31cf7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:35:49, skipping insertion in model container [2022-11-03 01:35:49,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:35:49" (3/3) ... [2022-11-03 01:35:49,966 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstpcpy-alloca-1.i [2022-11-03 01:35:50,000 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:35:50,001 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2022-11-03 01:35:50,060 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:35:50,067 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;@6d6e9e30, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:35:50,068 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-11-03 01:35:50,073 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 10 states have (on average 2.3) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:35:50,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-03 01:35:50,080 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:35:50,081 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-03 01:35:50,082 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-03 01:35:50,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:35:50,089 INFO L85 PathProgramCache]: Analyzing trace with hash 105340, now seen corresponding path program 1 times [2022-11-03 01:35:50,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:35:50,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115716660] [2022-11-03 01:35:50,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:35:50,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:35:50,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:35:50,350 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 01:35:50,351 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:35:50,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115716660] [2022-11-03 01:35:50,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115716660] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:35:50,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:35:50,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-03 01:35:50,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444187476] [2022-11-03 01:35:50,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:35:50,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:35:50,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:35:50,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:35:50,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:35:50,398 INFO L87 Difference]: Start difference. First operand has 20 states, 10 states have (on average 2.3) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:35:50,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:35:50,481 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2022-11-03 01:35:50,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:35:50,484 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-03 01:35:50,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:35:50,492 INFO L225 Difference]: With dead ends: 21 [2022-11-03 01:35:50,492 INFO L226 Difference]: Without dead ends: 19 [2022-11-03 01:35:50,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 01:35:50,498 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:35:50,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 20 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:35:50,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-03 01:35:50,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-03 01:35:50,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 10 states have (on average 2.0) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:35:50,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-11-03 01:35:50,532 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 3 [2022-11-03 01:35:50,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:35:50,532 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-11-03 01:35:50,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:35:50,533 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-11-03 01:35:50,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 01:35:50,533 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:35:50,534 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 01:35:50,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:35:50,534 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-03 01:35:50,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:35:50,535 INFO L85 PathProgramCache]: Analyzing trace with hash 3267810, now seen corresponding path program 1 times [2022-11-03 01:35:50,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:35:50,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378325751] [2022-11-03 01:35:50,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:35:50,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:35:50,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:35:50,697 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 01:35:50,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:35:50,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378325751] [2022-11-03 01:35:50,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378325751] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:35:50,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:35:50,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:35:50,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016911767] [2022-11-03 01:35:50,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:35:50,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:35:50,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:35:50,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:35:50,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:35:50,701 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:35:50,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:35:50,728 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2022-11-03 01:35:50,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:35:50,729 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-03 01:35:50,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:35:50,729 INFO L225 Difference]: With dead ends: 17 [2022-11-03 01:35:50,729 INFO L226 Difference]: Without dead ends: 17 [2022-11-03 01:35:50,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:35:50,731 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 13 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:35:50,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 6 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:35:50,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-03 01:35:50,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-03 01:35:50,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.8) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:35:50,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-11-03 01:35:50,735 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 4 [2022-11-03 01:35:50,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:35:50,736 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-11-03 01:35:50,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:35:50,736 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-11-03 01:35:50,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 01:35:50,737 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:35:50,737 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 01:35:50,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 01:35:50,738 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-03 01:35:50,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:35:50,738 INFO L85 PathProgramCache]: Analyzing trace with hash 3267811, now seen corresponding path program 1 times [2022-11-03 01:35:50,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:35:50,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758922678] [2022-11-03 01:35:50,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:35:50,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:35:50,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:35:50,891 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 01:35:50,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:35:50,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758922678] [2022-11-03 01:35:50,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758922678] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:35:50,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:35:50,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:35:50,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911303213] [2022-11-03 01:35:50,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:35:50,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:35:50,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:35:50,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:35:50,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:35:50,900 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:35:50,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:35:50,970 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2022-11-03 01:35:50,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:35:50,971 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-03 01:35:50,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:35:50,972 INFO L225 Difference]: With dead ends: 20 [2022-11-03 01:35:50,972 INFO L226 Difference]: Without dead ends: 20 [2022-11-03 01:35:50,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:35:50,974 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 19 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:35:50,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 16 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:35:50,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-03 01:35:50,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2022-11-03 01:35:50,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:35:50,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-11-03 01:35:50,978 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 4 [2022-11-03 01:35:50,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:35:50,979 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-11-03 01:35:50,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:35:50,979 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-11-03 01:35:50,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 01:35:50,980 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:35:50,980 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 01:35:50,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 01:35:50,981 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-03 01:35:50,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:35:50,981 INFO L85 PathProgramCache]: Analyzing trace with hash 3266345, now seen corresponding path program 1 times [2022-11-03 01:35:50,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:35:50,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842888725] [2022-11-03 01:35:50,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:35:50,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:35:51,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:35:51,464 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 01:35:51,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:35:51,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842888725] [2022-11-03 01:35:51,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842888725] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:35:51,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:35:51,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:35:51,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465926482] [2022-11-03 01:35:51,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:35:51,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:35:51,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:35:51,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:35:51,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:35:51,470 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:35:51,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:35:51,570 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2022-11-03 01:35:51,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:35:51,571 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-03 01:35:51,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:35:51,573 INFO L225 Difference]: With dead ends: 19 [2022-11-03 01:35:51,573 INFO L226 Difference]: Without dead ends: 19 [2022-11-03 01:35:51,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 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 01:35:51,576 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:35:51,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 17 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:35:51,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-03 01:35:51,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-03 01:35:51,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:35:51,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-11-03 01:35:51,585 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 4 [2022-11-03 01:35:51,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:35:51,586 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-11-03 01:35:51,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:35:51,586 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-11-03 01:35:51,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-03 01:35:51,587 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:35:51,587 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-03 01:35:51,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 01:35:51,592 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-03 01:35:51,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:35:51,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1155966095, now seen corresponding path program 1 times [2022-11-03 01:35:51,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:35:51,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461771895] [2022-11-03 01:35:51,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:35:51,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:35:51,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:35:51,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:35:51,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:35:51,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461771895] [2022-11-03 01:35:51,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461771895] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:35:51,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414440360] [2022-11-03 01:35:51,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:35:51,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:35:51,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:35:51,780 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:35:51,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:35:51,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:35:51,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:35:51,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:35:52,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:35:52,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:35:52,159 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 19 [2022-11-03 01:35:52,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:35:52,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414440360] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:35:52,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1740486259] [2022-11-03 01:35:52,242 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-03 01:35:52,243 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:35:52,248 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:35:52,257 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:35:52,257 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:35:52,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:35:52,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-03 01:35:52,439 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 01:35:52,559 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 01:35:52,604 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 01:35:52,686 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:35:53,322 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '234#(and (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~length2~0#1|)) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.offset|) (<= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (not (<= (+ |ULTIMATE.start_main_~length2~0#1| |ULTIMATE.start_main_~nondetString~0#1.offset|) (select |#length| |ULTIMATE.start_main_~nondetString~0#1.base|))) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (= |#NULL.base| 0))' at error location [2022-11-03 01:35:53,323 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:35:53,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:35:53,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2022-11-03 01:35:53,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692634963] [2022-11-03 01:35:53,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:35:53,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 01:35:53,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:35:53,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 01:35:53,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-11-03 01:35:53,326 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:35:53,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:35:53,516 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2022-11-03 01:35:53,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:35:53,517 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-03 01:35:53,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:35:53,518 INFO L225 Difference]: With dead ends: 18 [2022-11-03 01:35:53,518 INFO L226 Difference]: Without dead ends: 18 [2022-11-03 01:35:53,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2022-11-03 01:35:53,520 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 78 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:35:53,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 17 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:35:53,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-03 01:35:53,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-03 01:35:53,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:35:53,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-11-03 01:35:53,524 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 6 [2022-11-03 01:35:53,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:35:53,524 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-11-03 01:35:53,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:35:53,525 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-11-03 01:35:53,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-03 01:35:53,525 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:35:53,525 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-11-03 01:35:53,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-03 01:35:53,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:35:53,740 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-03 01:35:53,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:35:53,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1155967561, now seen corresponding path program 1 times [2022-11-03 01:35:53,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:35:53,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142211286] [2022-11-03 01:35:53,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:35:53,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:35:53,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:35:54,026 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 01:35:54,027 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:35:54,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142211286] [2022-11-03 01:35:54,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142211286] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:35:54,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626616540] [2022-11-03 01:35:54,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:35:54,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:35:54,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:35:54,032 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:35:54,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 01:35:54,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:35:54,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 01:35:54,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:35:54,177 INFO L356 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-03 01:35:54,178 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 1 case distinctions, treesize of input 11 treesize of output 17 [2022-11-03 01:35:54,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:35:54,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:35:54,542 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 01:35:54,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626616540] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:35:54,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1746022258] [2022-11-03 01:35:54,546 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-03 01:35:54,546 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:35:54,546 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:35:54,547 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:35:54,547 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:35:54,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:35:54,607 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-03 01:35:54,666 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 01:35:54,732 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 01:35:54,771 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 01:35:54,789 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:35:55,205 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '325#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= |ULTIMATE.start_main_#t~nondet10#1| 127) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet10#1|)) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (not (<= (+ |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~nondetString~0#1.offset| 1) (select |#length| |ULTIMATE.start_main_~nondetString~0#1.base|))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (= |#NULL.base| 0))' at error location [2022-11-03 01:35:55,205 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:35:55,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:35:55,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2022-11-03 01:35:55,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19971808] [2022-11-03 01:35:55,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:35:55,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 01:35:55,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:35:55,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 01:35:55,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2022-11-03 01:35:55,208 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:35:55,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:35:55,455 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2022-11-03 01:35:55,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:35:55,455 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-03 01:35:55,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:35:55,456 INFO L225 Difference]: With dead ends: 17 [2022-11-03 01:35:55,456 INFO L226 Difference]: Without dead ends: 17 [2022-11-03 01:35:55,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2022-11-03 01:35:55,457 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 83 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:35:55,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 12 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:35:55,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-03 01:35:55,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2022-11-03 01:35:55,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:35:55,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-11-03 01:35:55,460 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 6 [2022-11-03 01:35:55,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:35:55,461 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-11-03 01:35:55,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:35:55,461 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-11-03 01:35:55,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-03 01:35:55,462 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:35:55,462 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:35:55,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:35:55,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 01:35:55,662 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-03 01:35:55,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:35:55,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1475209664, now seen corresponding path program 1 times [2022-11-03 01:35:55,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:35:55,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731645462] [2022-11-03 01:35:55,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:35:55,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:35:55,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:35:55,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:35:55,709 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:35:55,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731645462] [2022-11-03 01:35:55,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731645462] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:35:55,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:35:55,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:35:55,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528607872] [2022-11-03 01:35:55,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:35:55,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:35:55,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:35:55,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:35:55,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:35:55,712 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:35:55,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:35:55,750 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2022-11-03 01:35:55,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:35:55,750 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-03 01:35:55,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:35:55,751 INFO L225 Difference]: With dead ends: 15 [2022-11-03 01:35:55,751 INFO L226 Difference]: Without dead ends: 15 [2022-11-03 01:35:55,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 01:35:55,752 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 14 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:35:55,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 6 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:35:55,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-03 01:35:55,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-03 01:35:55,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:35:55,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-11-03 01:35:55,755 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 7 [2022-11-03 01:35:55,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:35:55,756 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-11-03 01:35:55,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:35:55,756 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-11-03 01:35:55,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-03 01:35:55,757 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:35:55,757 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:35:55,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 01:35:55,757 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-03 01:35:55,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:35:55,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1475209663, now seen corresponding path program 1 times [2022-11-03 01:35:55,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:35:55,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107738485] [2022-11-03 01:35:55,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:35:55,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:35:55,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:35:55,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:35:55,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:35:55,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107738485] [2022-11-03 01:35:55,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107738485] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:35:55,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108535932] [2022-11-03 01:35:55,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:35:55,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:35:55,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:35:55,949 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:35:55,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 01:35:56,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:35:56,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 01:35:56,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:35:56,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:35:56,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:35:56,109 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 21 treesize of output 17 [2022-11-03 01:35:56,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:35:56,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108535932] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:35:56,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1129627496] [2022-11-03 01:35:56,128 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-03 01:35:56,128 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:35:56,129 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:35:56,129 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:35:56,129 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:35:56,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:35:56,178 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-03 01:35:56,243 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 01:35:56,306 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 01:35:56,334 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 01:35:56,398 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 01:35:56,421 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:35:57,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1129627496] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:35:57,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:35:57,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 4, 4] total 13 [2022-11-03 01:35:57,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116467547] [2022-11-03 01:35:57,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:35:57,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:35:57,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:35:57,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:35:57,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:35:57,064 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:35:57,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:35:57,142 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2022-11-03 01:35:57,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:35:57,142 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-03 01:35:57,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:35:57,143 INFO L225 Difference]: With dead ends: 19 [2022-11-03 01:35:57,143 INFO L226 Difference]: Without dead ends: 19 [2022-11-03 01:35:57,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:35:57,144 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:35:57,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 11 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:35:57,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-03 01:35:57,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2022-11-03 01:35:57,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:35:57,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-11-03 01:35:57,147 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 7 [2022-11-03 01:35:57,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:35:57,147 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-11-03 01:35:57,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:35:57,148 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-11-03 01:35:57,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-03 01:35:57,148 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:35:57,148 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:35:57,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:35:57,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:35:57,360 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-03 01:35:57,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:35:57,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1513140689, now seen corresponding path program 1 times [2022-11-03 01:35:57,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:35:57,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98470191] [2022-11-03 01:35:57,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:35:57,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:35:57,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:35:57,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:35:57,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:35:57,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98470191] [2022-11-03 01:35:57,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98470191] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:35:57,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:35:57,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:35:57,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935903999] [2022-11-03 01:35:57,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:35:57,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:35:57,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:35:57,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:35:57,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:35:57,485 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:35:57,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:35:57,517 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2022-11-03 01:35:57,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:35:57,519 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-03 01:35:57,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:35:57,520 INFO L225 Difference]: With dead ends: 15 [2022-11-03 01:35:57,520 INFO L226 Difference]: Without dead ends: 15 [2022-11-03 01:35:57,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:35:57,523 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 11 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:35:57,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 7 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:35:57,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-03 01:35:57,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-03 01:35:57,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:35:57,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-11-03 01:35:57,529 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 8 [2022-11-03 01:35:57,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:35:57,529 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-11-03 01:35:57,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:35:57,530 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-11-03 01:35:57,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-03 01:35:57,530 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:35:57,530 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:35:57,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 01:35:57,531 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-03 01:35:57,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:35:57,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1513140690, now seen corresponding path program 1 times [2022-11-03 01:35:57,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:35:57,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711485039] [2022-11-03 01:35:57,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:35:57,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:35:57,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:35:57,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:35:57,777 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:35:57,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711485039] [2022-11-03 01:35:57,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711485039] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:35:57,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112560033] [2022-11-03 01:35:57,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:35:57,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:35:57,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:35:57,779 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:35:57,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 01:35:57,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:35:57,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-03 01:35:57,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:35:57,915 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 01:35:57,926 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-03 01:35:58,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:35:58,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:35:58,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:35:58,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:35:58,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112560033] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:35:58,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1867474154] [2022-11-03 01:35:58,739 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 01:35:58,739 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:35:58,739 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:35:58,740 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:35:58,740 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:35:58,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:35:58,806 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-03 01:35:58,846 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 01:35:58,903 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 01:35:58,962 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 01:35:59,015 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 01:35:59,061 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:36:00,447 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '593#(and (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~length2~0#1|)) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_cstpcpy_~from#1.base|) |ULTIMATE.start_cstpcpy_~from#1.offset|) |ULTIMATE.start_cstpcpy_#t~mem4#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (= (select (select |#memory_int| |ULTIMATE.start_main_~nondetString~0#1.base|) (+ (- 1) |ULTIMATE.start_main_~length2~0#1| |ULTIMATE.start_main_~nondetString~0#1.offset|)) 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (= |ULTIMATE.start_main_~nondetArea~0#1.base| |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= (+ |ULTIMATE.start_main_~length2~0#1| |ULTIMATE.start_main_~nondetString~0#1.offset|) (select |#length| |ULTIMATE.start_main_~nondetString~0#1.base|)) (= |ULTIMATE.start_cstpcpy_#in~from#1.offset| |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (= |ULTIMATE.start_cstpcpy_#in~to#1.offset| |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.offset|) (<= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 (+ |ULTIMATE.start_main_~length2~0#1| |ULTIMATE.start_main_~nondetString~0#1.offset|)) (= |ULTIMATE.start_cstpcpy_#in~from#1.offset| |ULTIMATE.start_cstpcpy_~from#1.offset|) (= (select |#valid| |ULTIMATE.start_cstpcpy_~from#1.base|) 1) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_cstpcpy_#in~to#1.offset| |ULTIMATE.start_main_~nondetArea~0#1.offset|) (= |ULTIMATE.start_cstpcpy_~to#1.base| |ULTIMATE.start_cstpcpy_#in~to#1.base|) (= |ULTIMATE.start_cstpcpy_#in~from#1.base| |ULTIMATE.start_main_~nondetString~0#1.base|) (not (<= (+ |ULTIMATE.start_cstpcpy_~to#1.offset| 1) (select |#length| |ULTIMATE.start_cstpcpy_~to#1.base|))) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#NULL.offset|) (= |ULTIMATE.start_cstpcpy_~from#1.base| |ULTIMATE.start_cstpcpy_#in~from#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (= |#NULL.base| 0))' at error location [2022-11-03 01:36:00,448 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:36:00,448 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:36:00,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 19 [2022-11-03 01:36:00,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047902595] [2022-11-03 01:36:00,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:36:00,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-03 01:36:00,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:36:00,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-03 01:36:00,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2022-11-03 01:36:00,450 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:36:00,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:36:00,740 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2022-11-03 01:36:00,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 01:36:00,741 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-03 01:36:00,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:36:00,741 INFO L225 Difference]: With dead ends: 25 [2022-11-03 01:36:00,742 INFO L226 Difference]: Without dead ends: 25 [2022-11-03 01:36:00,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=179, Invalid=751, Unknown=0, NotChecked=0, Total=930 [2022-11-03 01:36:00,743 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:36:00,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 30 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 69 Invalid, 0 Unknown, 18 Unchecked, 0.1s Time] [2022-11-03 01:36:00,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-03 01:36:00,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2022-11-03 01:36:00,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:36:00,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-11-03 01:36:00,746 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 8 [2022-11-03 01:36:00,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:36:00,746 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-11-03 01:36:00,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:36:00,747 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-11-03 01:36:00,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-03 01:36:00,747 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:36:00,747 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:36:00,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:36:00,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 01:36:00,948 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-03 01:36:00,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:36:00,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1865709960, now seen corresponding path program 1 times [2022-11-03 01:36:00,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:36:00,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087589313] [2022-11-03 01:36:00,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:36:00,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:36:00,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:36:01,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:36:01,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:36:01,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087589313] [2022-11-03 01:36:01,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087589313] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:36:01,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234582918] [2022-11-03 01:36:01,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:36:01,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:36:01,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:36:01,259 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:36:01,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 01:36:01,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:36:01,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 01:36:01,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:36:01,444 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 01:36:01,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:36:01,501 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:36:01,501 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 18 treesize of output 10 [2022-11-03 01:36:01,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:36:01,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:36:01,581 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 13 treesize of output 11 [2022-11-03 01:36:01,586 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 20 [2022-11-03 01:36:01,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:36:01,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234582918] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:36:01,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1643894425] [2022-11-03 01:36:01,772 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:36:01,772 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:36:01,773 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:36:01,773 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:36:01,773 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:36:01,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:36:01,843 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-03 01:36:01,889 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 01:36:01,957 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 01:36:01,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 01:36:02,069 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 01:36:02,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:36:02,161 INFO L356 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-03 01:36:02,161 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-03 01:36:02,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:36:02,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:36:02,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:36:02,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:36:02,337 INFO L356 Elim1Store]: treesize reduction 97, result has 15.7 percent of original size [2022-11-03 01:36:02,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 50 treesize of output 54 [2022-11-03 01:36:02,416 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 01:36:02,417 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 01:36:02,519 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:36:04,327 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '724#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (not (<= (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1) (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|))) (= |#NULL.base| 0))' at error location [2022-11-03 01:36:04,327 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:36:04,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:36:04,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 17 [2022-11-03 01:36:04,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067595055] [2022-11-03 01:36:04,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:36:04,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 01:36:04,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:36:04,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 01:36:04,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-11-03 01:36:04,338 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:36:04,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:36:04,628 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2022-11-03 01:36:04,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:36:04,629 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-03 01:36:04,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:36:04,630 INFO L225 Difference]: With dead ends: 26 [2022-11-03 01:36:04,630 INFO L226 Difference]: Without dead ends: 26 [2022-11-03 01:36:04,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2022-11-03 01:36:04,631 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 11 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:36:04,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 41 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 123 Invalid, 0 Unknown, 12 Unchecked, 0.1s Time] [2022-11-03 01:36:04,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-03 01:36:04,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-03 01:36:04,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:36:04,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-11-03 01:36:04,635 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 10 [2022-11-03 01:36:04,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:36:04,635 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-11-03 01:36:04,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:36:04,635 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-11-03 01:36:04,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 01:36:04,636 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:36:04,636 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:36:04,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:36:04,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:36:04,864 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-03 01:36:04,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:36:04,864 INFO L85 PathProgramCache]: Analyzing trace with hash -2002450371, now seen corresponding path program 1 times [2022-11-03 01:36:04,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:36:04,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073289467] [2022-11-03 01:36:04,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:36:04,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:36:04,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:36:05,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:36:05,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:36:05,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073289467] [2022-11-03 01:36:05,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073289467] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:36:05,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:36:05,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:36:05,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875712257] [2022-11-03 01:36:05,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:36:05,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:36:05,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:36:05,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:36:05,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:36:05,023 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:36:05,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:36:05,043 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2022-11-03 01:36:05,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:36:05,044 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-03 01:36:05,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:36:05,045 INFO L225 Difference]: With dead ends: 25 [2022-11-03 01:36:05,045 INFO L226 Difference]: Without dead ends: 19 [2022-11-03 01:36:05,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 01:36:05,046 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:36:05,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 8 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:36:05,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-03 01:36:05,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-03 01:36:05,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:36:05,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-11-03 01:36:05,049 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 11 [2022-11-03 01:36:05,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:36:05,049 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-11-03 01:36:05,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:36:05,049 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-11-03 01:36:05,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-03 01:36:05,050 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:36:05,050 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:36:05,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 01:36:05,050 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-03 01:36:05,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:36:05,051 INFO L85 PathProgramCache]: Analyzing trace with hash -346987898, now seen corresponding path program 2 times [2022-11-03 01:36:05,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:36:05,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058221045] [2022-11-03 01:36:05,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:36:05,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:36:05,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:36:05,321 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 01:36:05,322 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:36:05,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058221045] [2022-11-03 01:36:05,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058221045] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:36:05,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221794429] [2022-11-03 01:36:05,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:36:05,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:36:05,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:36:05,324 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:36:05,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 01:36:05,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 01:36:05,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:36:05,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 01:36:05,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:36:05,454 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 01:36:05,516 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:36:05,517 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 18 treesize of output 19 [2022-11-03 01:36:05,623 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 01:36:05,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:36:05,728 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 13 treesize of output 11 [2022-11-03 01:36:05,736 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 20 [2022-11-03 01:36:05,744 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 31 treesize of output 23 [2022-11-03 01:36:05,773 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 01:36:05,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221794429] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:36:05,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2109309274] [2022-11-03 01:36:05,784 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:36:05,784 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:36:05,784 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:36:05,785 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:36:05,785 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:36:05,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:36:05,827 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-03 01:36:05,884 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 01:36:05,939 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 01:36:05,976 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 01:36:06,048 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 01:36:06,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:36:06,156 INFO L356 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-03 01:36:06,156 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-03 01:36:06,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:36:06,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:36:06,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:36:06,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:36:06,273 INFO L356 Elim1Store]: treesize reduction 95, result has 15.9 percent of original size [2022-11-03 01:36:06,274 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 54 treesize of output 56 [2022-11-03 01:36:06,359 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 01:36:06,360 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 01:36:06,471 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:36:08,276 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '922#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (not (<= (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1) (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|))) (= |#NULL.base| 0))' at error location [2022-11-03 01:36:08,276 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:36:08,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:36:08,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2022-11-03 01:36:08,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772863818] [2022-11-03 01:36:08,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:36:08,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 01:36:08,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:36:08,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 01:36:08,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-11-03 01:36:08,279 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:36:08,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:36:08,457 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2022-11-03 01:36:08,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:36:08,458 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-03 01:36:08,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:36:08,458 INFO L225 Difference]: With dead ends: 26 [2022-11-03 01:36:08,458 INFO L226 Difference]: Without dead ends: 26 [2022-11-03 01:36:08,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:36:08,460 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 14 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:36:08,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 3 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 124 Invalid, 0 Unknown, 19 Unchecked, 0.1s Time] [2022-11-03 01:36:08,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-03 01:36:08,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2022-11-03 01:36:08,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:36:08,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-11-03 01:36:08,462 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 12 [2022-11-03 01:36:08,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:36:08,463 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-11-03 01:36:08,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:36:08,463 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-11-03 01:36:08,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-03 01:36:08,467 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:36:08,468 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2022-11-03 01:36:08,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 01:36:08,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:36:08,684 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-03 01:36:08,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:36:08,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1686104722, now seen corresponding path program 2 times [2022-11-03 01:36:08,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:36:08,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862867223] [2022-11-03 01:36:08,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:36:08,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:36:08,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:36:09,047 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:36:09,048 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:36:09,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862867223] [2022-11-03 01:36:09,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862867223] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:36:09,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516528406] [2022-11-03 01:36:09,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:36:09,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:36:09,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:36:09,052 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:36:09,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 01:36:09,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-03 01:36:09,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:36:09,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-03 01:36:09,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:36:09,210 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 01:36:09,221 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-03 01:36:09,504 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 01:36:09,504 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:36:09,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516528406] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:36:09,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:36:09,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2022-11-03 01:36:09,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207904171] [2022-11-03 01:36:09,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:36:09,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:36:09,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:36:09,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:36:09,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:36:09,506 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:36:09,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:36:09,589 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-11-03 01:36:09,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:36:09,590 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-03 01:36:09,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:36:09,590 INFO L225 Difference]: With dead ends: 22 [2022-11-03 01:36:09,590 INFO L226 Difference]: Without dead ends: 22 [2022-11-03 01:36:09,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:36:09,591 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:36:09,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 4 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2022-11-03 01:36:09,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-03 01:36:09,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 17. [2022-11-03 01:36:09,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:36:09,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-11-03 01:36:09,593 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 12 [2022-11-03 01:36:09,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:36:09,593 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-11-03 01:36:09,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:36:09,594 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-11-03 01:36:09,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 01:36:09,594 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:36:09,594 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:36:09,631 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-03 01:36:09,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 01:36:09,810 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-03 01:36:09,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:36:09,811 INFO L85 PathProgramCache]: Analyzing trace with hash 2128277037, now seen corresponding path program 1 times [2022-11-03 01:36:09,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:36:09,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32617785] [2022-11-03 01:36:09,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:36:09,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:36:09,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:36:10,135 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 01:36:10,135 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:36:10,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32617785] [2022-11-03 01:36:10,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32617785] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:36:10,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915960838] [2022-11-03 01:36:10,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:36:10,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:36:10,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:36:10,137 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:36:10,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 01:36:10,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:36:10,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 01:36:10,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:36:10,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:36:10,274 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-03 01:36:10,282 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 01:36:10,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:36:10,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:36:10,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:36:10,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:36:10,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915960838] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:36:10,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [274595211] [2022-11-03 01:36:10,721 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:36:10,722 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:36:10,722 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:36:10,722 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:36:10,722 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:36:10,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:36:10,758 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-03 01:36:10,800 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 01:36:10,839 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 01:36:10,865 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 01:36:10,923 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 01:36:10,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:36:10,995 INFO L356 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-03 01:36:10,995 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-03 01:36:11,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:36:11,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:36:11,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:36:11,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:36:11,137 INFO L356 Elim1Store]: treesize reduction 97, result has 15.7 percent of original size [2022-11-03 01:36:11,138 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 50 treesize of output 54 [2022-11-03 01:36:11,215 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 01:36:11,216 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 01:36:11,304 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:36:13,127 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1164#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= (select (select |#memory_int| |ULTIMATE.start_cstpcpy_~from#1.base|) |ULTIMATE.start_cstpcpy_~from#1.offset|) |ULTIMATE.start_cstpcpy_#t~mem4#1|) (<= (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1) (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|)) (= (select |#valid| |ULTIMATE.start_cstpcpy_~from#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (not (<= (+ |ULTIMATE.start_cstpcpy_~to#1.offset| 1) (select |#length| |ULTIMATE.start_cstpcpy_~to#1.base|))) (= |#NULL.base| 0))' at error location [2022-11-03 01:36:13,127 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:36:13,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:36:13,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2022-11-03 01:36:13,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334193428] [2022-11-03 01:36:13,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:36:13,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-03 01:36:13,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:36:13,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-03 01:36:13,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2022-11-03 01:36:13,129 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:36:13,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:36:13,596 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2022-11-03 01:36:13,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:36:13,596 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-03 01:36:13,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:36:13,596 INFO L225 Difference]: With dead ends: 19 [2022-11-03 01:36:13,596 INFO L226 Difference]: Without dead ends: 19 [2022-11-03 01:36:13,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=208, Invalid=1052, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 01:36:13,598 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 95 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:36:13,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 0 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:36:13,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-03 01:36:13,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2022-11-03 01:36:13,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:36:13,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-11-03 01:36:13,600 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2022-11-03 01:36:13,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:36:13,601 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-11-03 01:36:13,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:36:13,601 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-11-03 01:36:13,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 01:36:13,602 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:36:13,602 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-03 01:36:13,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 01:36:13,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 01:36:13,808 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-03 01:36:13,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:36:13,808 INFO L85 PathProgramCache]: Analyzing trace with hash 869799955, now seen corresponding path program 3 times [2022-11-03 01:36:13,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:36:13,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098557998] [2022-11-03 01:36:13,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:36:13,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:36:13,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:36:14,382 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:36:14,382 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:36:14,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098557998] [2022-11-03 01:36:14,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098557998] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:36:14,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540762734] [2022-11-03 01:36:14,383 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:36:14,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:36:14,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:36:14,388 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:36:14,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 01:36:14,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:36:14,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:36:14,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-03 01:36:14,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:36:14,652 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 01:36:14,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:36:14,718 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-03 01:36:14,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:36:14,816 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:36:14,816 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 18 treesize of output 10 [2022-11-03 01:36:14,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:36:14,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:36:16,859 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_cstpcpy_~to#1.base| Int) (v_ArrVal_259 Int)) (= (select (select (store |c_#memory_int| |ULTIMATE.start_cstpcpy_~to#1.base| (store (select |c_#memory_int| |ULTIMATE.start_cstpcpy_~to#1.base|) |c_ULTIMATE.start_cstpcpy_~to#1.offset| v_ArrVal_259)) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)) 0)) is different from false [2022-11-03 01:36:16,881 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 134 treesize of output 122 [2022-11-03 01:36:17,133 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-03 01:36:17,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540762734] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:36:17,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [858307441] [2022-11-03 01:36:17,135 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:36:17,135 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:36:17,136 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:36:17,136 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:36:17,136 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:36:17,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:36:17,179 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-03 01:36:17,221 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 01:36:17,268 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 01:36:17,292 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 01:36:17,341 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 01:36:17,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:36:17,445 INFO L356 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-03 01:36:17,445 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-03 01:36:17,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:36:17,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:36:17,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:36:17,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:36:17,587 INFO L356 Elim1Store]: treesize reduction 97, result has 15.7 percent of original size [2022-11-03 01:36:17,588 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 52 treesize of output 54 [2022-11-03 01:36:17,678 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 01:36:17,679 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 01:36:17,768 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:36:19,462 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1331#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (not (<= (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1) (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|))) (= |#NULL.base| 0))' at error location [2022-11-03 01:36:19,463 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:36:19,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:36:19,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-11-03 01:36:19,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036127433] [2022-11-03 01:36:19,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:36:19,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-03 01:36:19,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:36:19,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-03 01:36:19,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=955, Unknown=1, NotChecked=62, Total=1122 [2022-11-03 01:36:19,465 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:36:20,582 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~from#1.base|))) (and (<= 0 |c_ULTIMATE.start_cstpcpy_~from#1.offset|) (forall ((|ULTIMATE.start_cstpcpy_~to#1.base| Int) (v_ArrVal_259 Int)) (= (select (select (store |c_#memory_int| |ULTIMATE.start_cstpcpy_~to#1.base| (store (select |c_#memory_int| |ULTIMATE.start_cstpcpy_~to#1.base|) |c_ULTIMATE.start_cstpcpy_~to#1.offset| v_ArrVal_259)) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)) 0)) (< 1 |c_ULTIMATE.start_main_~length2~0#1|) (exists ((|ULTIMATE.start_main_~length2~0#1| Int)) (and (= (select .cse0 (+ (- 1) |ULTIMATE.start_main_~length2~0#1| |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0) (< 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length2~0#1| 2))) (= 2 (+ |c_ULTIMATE.start_main_~length2~0#1| |c_ULTIMATE.start_main_~nondetString~0#1.offset|)) (<= |c_ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (= (select .cse0 1) 0) (not (= |c_ULTIMATE.start_main_~nondetString~0#1.base| |c_ULTIMATE.start_main_~nondetArea~0#1.base|)) (not (= |c_ULTIMATE.start_cstpcpy_~to#1.base| |c_ULTIMATE.start_cstpcpy_~from#1.base|)) (= |c_ULTIMATE.start_main_~nondetString~0#1.offset| 0) (= |c_ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |c_ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |c_ULTIMATE.start_main_~i~0#1| 2) (<= |c_ULTIMATE.start_main_~length2~0#1| 2) (<= |c_ULTIMATE.start_cstpcpy_~to#1.offset| 0))) is different from false [2022-11-03 01:36:21,659 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~from#1.base|))) (and (<= 0 |c_ULTIMATE.start_cstpcpy_~from#1.offset|) (forall ((|ULTIMATE.start_cstpcpy_~to#1.base| Int) (v_ArrVal_259 Int)) (= (select (select (store |c_#memory_int| |ULTIMATE.start_cstpcpy_~to#1.base| (store (select |c_#memory_int| |ULTIMATE.start_cstpcpy_~to#1.base|) |c_ULTIMATE.start_cstpcpy_~to#1.offset| v_ArrVal_259)) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)) 0)) (exists ((|ULTIMATE.start_main_~length2~0#1| Int)) (and (= (select .cse0 (+ (- 1) |ULTIMATE.start_main_~length2~0#1| |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0) (< 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length2~0#1| 2))) (= (select .cse0 1) 0) (not (= |c_ULTIMATE.start_cstpcpy_~to#1.base| |c_ULTIMATE.start_cstpcpy_~from#1.base|)) (= |c_ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= |c_ULTIMATE.start_cstpcpy_~to#1.offset| 0))) is different from false [2022-11-03 01:36:21,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:36:21,682 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2022-11-03 01:36:21,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 01:36:21,688 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-03 01:36:21,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:36:21,688 INFO L225 Difference]: With dead ends: 28 [2022-11-03 01:36:21,689 INFO L226 Difference]: Without dead ends: 21 [2022-11-03 01:36:21,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=155, Invalid=1336, Unknown=3, NotChecked=228, Total=1722 [2022-11-03 01:36:21,690 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 13 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:36:21,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 31 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 93 Invalid, 0 Unknown, 38 Unchecked, 0.1s Time] [2022-11-03 01:36:21,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-03 01:36:21,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2022-11-03 01:36:21,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:36:21,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-11-03 01:36:21,696 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2022-11-03 01:36:21,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:36:21,697 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-11-03 01:36:21,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:36:21,697 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-11-03 01:36:21,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 01:36:21,697 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:36:21,698 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-03 01:36:21,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 01:36:21,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-03 01:36:21,911 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-03 01:36:21,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:36:21,911 INFO L85 PathProgramCache]: Analyzing trace with hash 645895365, now seen corresponding path program 4 times [2022-11-03 01:36:21,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:36:21,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146639938] [2022-11-03 01:36:21,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:36:21,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:36:21,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:36:22,226 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:36:22,227 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:36:22,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146639938] [2022-11-03 01:36:22,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146639938] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:36:22,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776486917] [2022-11-03 01:36:22,227 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 01:36:22,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:36:22,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:36:22,229 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:36:22,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 01:36:22,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:36:22,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 01:36:22,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:36:22,439 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:36:22,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:36:22,587 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 01:36:22,620 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:36:22,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776486917] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:36:22,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [291951270] [2022-11-03 01:36:22,622 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:36:22,622 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:36:22,622 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:36:22,623 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:36:22,623 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:36:22,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:36:22,660 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-03 01:36:22,697 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 01:36:22,758 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 01:36:22,783 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 01:36:22,833 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 01:36:22,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:36:22,923 INFO L356 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-03 01:36:22,923 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-03 01:36:23,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:36:23,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:36:23,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:36:23,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:36:23,046 INFO L356 Elim1Store]: treesize reduction 97, result has 15.7 percent of original size [2022-11-03 01:36:23,047 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 52 treesize of output 54 [2022-11-03 01:36:23,129 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 01:36:23,130 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 01:36:23,209 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:36:24,910 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1519#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (not (<= (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1) (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|))) (= |#NULL.base| 0))' at error location [2022-11-03 01:36:24,910 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:36:24,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:36:24,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-11-03 01:36:24,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646772477] [2022-11-03 01:36:24,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:36:24,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 01:36:24,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:36:24,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 01:36:24,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2022-11-03 01:36:24,914 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:36:25,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:36:25,141 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2022-11-03 01:36:25,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 01:36:25,144 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-03 01:36:25,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:36:25,145 INFO L225 Difference]: With dead ends: 26 [2022-11-03 01:36:25,145 INFO L226 Difference]: Without dead ends: 26 [2022-11-03 01:36:25,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=182, Invalid=874, Unknown=0, NotChecked=0, Total=1056 [2022-11-03 01:36:25,146 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 50 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:36:25,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 1 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:36:25,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-03 01:36:25,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2022-11-03 01:36:25,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:36:25,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-11-03 01:36:25,149 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2022-11-03 01:36:25,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:36:25,149 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-11-03 01:36:25,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:36:25,150 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-11-03 01:36:25,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-03 01:36:25,150 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:36:25,150 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2022-11-03 01:36:25,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 01:36:25,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:36:25,376 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-03 01:36:25,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:36:25,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1452080178, now seen corresponding path program 2 times [2022-11-03 01:36:25,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:36:25,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257342121] [2022-11-03 01:36:25,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:36:25,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:36:25,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:36:25,804 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:36:25,804 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:36:25,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257342121] [2022-11-03 01:36:25,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257342121] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:36:25,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290533608] [2022-11-03 01:36:25,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:36:25,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:36:25,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:36:25,806 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:36:25,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 01:36:25,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 01:36:25,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:36:25,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-03 01:36:25,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:36:26,013 INFO L356 Elim1Store]: treesize reduction 11, result has 50.0 percent of original size [2022-11-03 01:36:26,014 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 1 case distinctions, treesize of input 11 treesize of output 17 [2022-11-03 01:36:26,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 01:36:26,565 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 01:36:26,566 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 75 [2022-11-03 01:36:26,611 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:36:26,612 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 61 treesize of output 79 [2022-11-03 01:36:26,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:36:26,914 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:36:26,914 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 64 [2022-11-03 01:36:27,300 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 01:36:27,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:36:27,854 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:36:27,854 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 36 [2022-11-03 01:36:27,879 INFO L356 Elim1Store]: treesize reduction 17, result has 54.1 percent of original size [2022-11-03 01:36:27,879 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 2 case distinctions, treesize of input 26 treesize of output 31 [2022-11-03 01:36:27,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:36:27,898 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:36:27,898 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 35 [2022-11-03 01:36:27,903 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 3 [2022-11-03 01:36:28,266 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 01:36:28,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290533608] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:36:28,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [845078963] [2022-11-03 01:36:28,268 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:36:28,268 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:36:28,269 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:36:28,269 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:36:28,269 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:36:28,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:36:28,312 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-03 01:36:28,353 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 01:36:28,393 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 01:36:28,417 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 01:36:28,470 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 01:36:28,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:36:28,541 INFO L356 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-03 01:36:28,541 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-03 01:36:28,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:36:28,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:36:28,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:36:28,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:36:28,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:36:28,659 INFO L356 Elim1Store]: treesize reduction 97, result has 15.7 percent of original size [2022-11-03 01:36:28,659 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 50 treesize of output 54 [2022-11-03 01:36:28,745 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 01:36:28,746 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 01:36:28,825 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:36:30,744 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1718#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= (select (select |#memory_int| |ULTIMATE.start_cstpcpy_~from#1.base|) |ULTIMATE.start_cstpcpy_~from#1.offset|) |ULTIMATE.start_cstpcpy_#t~mem4#1|) (<= (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1) (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|)) (= (select |#valid| |ULTIMATE.start_cstpcpy_~from#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (not (<= (+ |ULTIMATE.start_cstpcpy_~to#1.offset| 1) (select |#length| |ULTIMATE.start_cstpcpy_~to#1.base|))) (= |#NULL.base| 0))' at error location [2022-11-03 01:36:30,745 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:36:30,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:36:30,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 29 [2022-11-03 01:36:30,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97251618] [2022-11-03 01:36:30,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:36:30,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-03 01:36:30,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:36:30,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-03 01:36:30,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1307, Unknown=1, NotChecked=0, Total=1482 [2022-11-03 01:36:30,747 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 31 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:36:32,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:36:32,116 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2022-11-03 01:36:32,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 01:36:32,117 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-03 01:36:32,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:36:32,117 INFO L225 Difference]: With dead ends: 27 [2022-11-03 01:36:32,117 INFO L226 Difference]: Without dead ends: 27 [2022-11-03 01:36:32,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=335, Invalid=2316, Unknown=1, NotChecked=0, Total=2652 [2022-11-03 01:36:32,119 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 21 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:36:32,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 3 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 214 Invalid, 0 Unknown, 58 Unchecked, 0.2s Time] [2022-11-03 01:36:32,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-03 01:36:32,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-11-03 01:36:32,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:36:32,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2022-11-03 01:36:32,122 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 18 [2022-11-03 01:36:32,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:36:32,123 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2022-11-03 01:36:32,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:36:32,123 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2022-11-03 01:36:32,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-03 01:36:32,124 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:36:32,124 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2022-11-03 01:36:32,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 01:36:32,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-03 01:36:32,328 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-03 01:36:32,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:36:32,328 INFO L85 PathProgramCache]: Analyzing trace with hash 415320436, now seen corresponding path program 5 times [2022-11-03 01:36:32,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:36:32,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382927952] [2022-11-03 01:36:32,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:36:32,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:36:32,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:36:32,873 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:36:32,874 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:36:32,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382927952] [2022-11-03 01:36:32,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382927952] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:36:32,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368041627] [2022-11-03 01:36:32,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:36:32,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:36:32,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:36:32,876 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:36:32,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 01:36:33,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 01:36:33,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:36:33,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-03 01:36:33,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:36:33,126 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 01:36:33,275 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 01:36:33,294 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-03 01:36:33,336 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-03 01:36:33,384 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 01:36:33,389 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:36:33,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:36:33,418 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_376 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_376) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)) 0)) is different from false [2022-11-03 01:36:33,427 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_376 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_376) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 2 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2022-11-03 01:36:33,441 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:36:33,441 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-03 01:36:33,449 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:36:33,449 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 37 treesize of output 32 [2022-11-03 01:36:33,457 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 3 [2022-11-03 01:36:33,639 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2022-11-03 01:36:33,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368041627] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:36:33,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [424990293] [2022-11-03 01:36:33,642 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:36:33,642 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:36:33,643 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:36:33,643 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:36:33,643 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:36:33,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:36:33,705 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-03 01:36:33,741 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 01:36:33,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 01:36:33,816 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 01:36:33,872 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 01:36:33,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:36:33,945 INFO L356 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-03 01:36:33,945 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-03 01:36:34,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:36:34,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:36:34,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:36:34,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:36:34,064 INFO L356 Elim1Store]: treesize reduction 97, result has 15.7 percent of original size [2022-11-03 01:36:34,064 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 50 treesize of output 54 [2022-11-03 01:36:34,146 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 01:36:34,146 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 01:36:34,229 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:36:35,863 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1946#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (not (<= (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1) (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|))) (= |#NULL.base| 0))' at error location [2022-11-03 01:36:35,863 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:36:35,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:36:35,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 27 [2022-11-03 01:36:35,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153626581] [2022-11-03 01:36:35,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:36:35,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-03 01:36:35,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:36:35,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-03 01:36:35,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=952, Unknown=2, NotChecked=126, Total=1190 [2022-11-03 01:36:35,866 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:36:36,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:36:36,240 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2022-11-03 01:36:36,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 01:36:36,241 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-03 01:36:36,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:36:36,241 INFO L225 Difference]: With dead ends: 39 [2022-11-03 01:36:36,241 INFO L226 Difference]: Without dead ends: 29 [2022-11-03 01:36:36,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=142, Invalid=1196, Unknown=2, NotChecked=142, Total=1482 [2022-11-03 01:36:36,243 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 7 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:36:36,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 39 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 298 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2022-11-03 01:36:36,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-03 01:36:36,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-11-03 01:36:36,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:36:36,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-11-03 01:36:36,246 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 20 [2022-11-03 01:36:36,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:36:36,246 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-11-03 01:36:36,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:36:36,246 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-11-03 01:36:36,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-03 01:36:36,247 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:36:36,247 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2022-11-03 01:36:36,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 01:36:36,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:36:36,452 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-03 01:36:36,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:36:36,452 INFO L85 PathProgramCache]: Analyzing trace with hash 2133191682, now seen corresponding path program 6 times [2022-11-03 01:36:36,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:36:36,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56594097] [2022-11-03 01:36:36,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:36:36,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:36:36,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:36:36,748 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:36:36,748 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:36:36,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56594097] [2022-11-03 01:36:36,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56594097] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:36:36,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978506121] [2022-11-03 01:36:36,749 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:36:36,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:36:36,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:36:36,752 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:36:36,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 01:36:36,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:36:36,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:36:36,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 01:36:36,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:36:36,889 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 01:36:36,889 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-03 01:36:37,024 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:36:37,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:36:37,300 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:36:37,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978506121] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:36:37,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [954214251] [2022-11-03 01:36:37,301 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:36:37,302 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:36:37,302 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:36:37,302 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:36:37,302 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:36:37,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:36:37,336 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-03 01:36:37,370 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 01:36:37,419 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 01:36:37,442 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 01:36:37,495 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 01:36:37,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:36:37,565 INFO L356 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-03 01:36:37,565 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-03 01:36:37,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:36:37,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:36:37,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:36:37,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:36:37,674 INFO L356 Elim1Store]: treesize reduction 97, result has 15.7 percent of original size [2022-11-03 01:36:37,674 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 52 treesize of output 54 [2022-11-03 01:36:37,743 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 01:36:37,743 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 01:36:37,825 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:36:39,454 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2186#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (not (<= (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1) (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|))) (= |#NULL.base| 0))' at error location [2022-11-03 01:36:39,454 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:36:39,454 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:36:39,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2022-11-03 01:36:39,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852539912] [2022-11-03 01:36:39,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:36:39,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-03 01:36:39,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:36:39,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-03 01:36:39,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1080, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 01:36:39,456 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 28 states, 27 states have (on average 2.111111111111111) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:36:39,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:36:39,731 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2022-11-03 01:36:39,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 01:36:39,732 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.111111111111111) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-03 01:36:39,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:36:39,732 INFO L225 Difference]: With dead ends: 30 [2022-11-03 01:36:39,732 INFO L226 Difference]: Without dead ends: 30 [2022-11-03 01:36:39,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=303, Invalid=1419, Unknown=0, NotChecked=0, Total=1722 [2022-11-03 01:36:39,734 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 84 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:36:39,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 1 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:36:39,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-03 01:36:39,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2022-11-03 01:36:39,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:36:39,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2022-11-03 01:36:39,737 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 22 [2022-11-03 01:36:39,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:36:39,737 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2022-11-03 01:36:39,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.111111111111111) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:36:39,738 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2022-11-03 01:36:39,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-03 01:36:39,738 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:36:39,739 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2022-11-03 01:36:39,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 01:36:39,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:36:39,964 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-03 01:36:39,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:36:39,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1577274647, now seen corresponding path program 7 times [2022-11-03 01:36:39,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:36:39,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555413070] [2022-11-03 01:36:39,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:36:39,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:36:40,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:36:40,720 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:36:40,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:36:40,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555413070] [2022-11-03 01:36:40,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555413070] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:36:40,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863880767] [2022-11-03 01:36:40,721 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 01:36:40,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:36:40,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:36:40,722 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:36:40,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 01:36:40,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:36:40,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-03 01:36:40,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:36:40,866 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 01:36:41,094 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 01:36:41,200 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-03 01:36:41,251 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-03 01:36:41,300 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-03 01:36:41,361 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 01:36:41,365 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:36:41,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:36:41,406 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_473 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_473) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)) 0)) is different from false [2022-11-03 01:36:41,415 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_473 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_473) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 2 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2022-11-03 01:36:41,428 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_473 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_473) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 3)) 0)) is different from false [2022-11-03 01:36:41,489 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:36:41,489 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-03 01:36:41,498 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:36:41,499 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 37 treesize of output 36 [2022-11-03 01:36:41,505 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 11 treesize of output 7 [2022-11-03 01:36:42,004 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 16 not checked. [2022-11-03 01:36:42,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863880767] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:36:42,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1341417546] [2022-11-03 01:36:42,006 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:36:42,006 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:36:42,006 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:36:42,007 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:36:42,007 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:36:42,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:36:42,039 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-03 01:36:42,078 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 01:36:42,122 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 01:36:42,142 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 01:36:42,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 01:36:42,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:36:42,294 INFO L356 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-03 01:36:42,294 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-03 01:36:42,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:36:42,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:36:42,359 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:36:42,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:36:42,393 INFO L356 Elim1Store]: treesize reduction 95, result has 15.9 percent of original size [2022-11-03 01:36:42,393 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 54 treesize of output 56 [2022-11-03 01:36:42,462 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 01:36:42,463 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 01:36:42,541 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:36:44,255 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2446#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (not (<= (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1) (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|))) (= |#NULL.base| 0))' at error location [2022-11-03 01:36:44,256 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:36:44,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:36:44,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 38 [2022-11-03 01:36:44,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685822286] [2022-11-03 01:36:44,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:36:44,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-03 01:36:44,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:36:44,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-03 01:36:44,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1671, Unknown=3, NotChecked=252, Total=2070 [2022-11-03 01:36:44,258 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 38 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 38 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:36:45,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:36:45,078 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2022-11-03 01:36:45,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 01:36:45,078 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 38 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-03 01:36:45,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:36:45,079 INFO L225 Difference]: With dead ends: 44 [2022-11-03 01:36:45,079 INFO L226 Difference]: Without dead ends: 31 [2022-11-03 01:36:45,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=234, Invalid=2531, Unknown=3, NotChecked=312, Total=3080 [2022-11-03 01:36:45,081 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 20 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:36:45,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 57 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 468 Invalid, 0 Unknown, 96 Unchecked, 0.3s Time] [2022-11-03 01:36:45,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-03 01:36:45,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-11-03 01:36:45,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:36:45,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2022-11-03 01:36:45,084 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 25 [2022-11-03 01:36:45,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:36:45,084 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2022-11-03 01:36:45,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 38 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:36:45,085 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2022-11-03 01:36:45,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-03 01:36:45,085 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:36:45,085 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2022-11-03 01:36:45,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-03 01:36:45,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:36:45,308 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-03 01:36:45,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:36:45,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1182526647, now seen corresponding path program 8 times [2022-11-03 01:36:45,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:36:45,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777042083] [2022-11-03 01:36:45,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:36:45,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:36:45,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:36:45,703 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 12 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:36:45,704 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:36:45,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777042083] [2022-11-03 01:36:45,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777042083] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:36:45,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479927836] [2022-11-03 01:36:45,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:36:45,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:36:45,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:36:45,708 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:36:45,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 01:36:45,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-03 01:36:45,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:36:45,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 89 conjunts are in the unsatisfiable core [2022-11-03 01:36:45,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:36:45,997 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 01:36:46,005 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-03 01:36:46,225 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 01:36:46,292 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-03 01:36:46,427 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-11-03 01:36:46,606 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2022-11-03 01:36:46,767 INFO L356 Elim1Store]: treesize reduction 8, result has 81.4 percent of original size [2022-11-03 01:36:46,767 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 49 [2022-11-03 01:36:46,907 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 01:36:46,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:36:47,121 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_cstpcpy_~from#1.offset_89| Int) (v_ArrVal_531 (Array Int Int))) (or (not (<= 0 |v_ULTIMATE.start_cstpcpy_~from#1.offset_89|)) (<= (+ |v_ULTIMATE.start_cstpcpy_~from#1.offset_89| 2) (select |c_#length| |c_ULTIMATE.start_cstpcpy_~from#1.base|)) (not (<= |v_ULTIMATE.start_cstpcpy_~from#1.offset_89| (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_531) |c_ULTIMATE.start_cstpcpy_~from#1.base|) |v_ULTIMATE.start_cstpcpy_~from#1.offset_89|) 0))) (= |c_ULTIMATE.start_cstpcpy_#t~mem4#1| 0)) is different from false [2022-11-03 01:36:47,150 WARN L833 $PredicateComparison]: unable to prove that (or (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~from#1.base|) |c_ULTIMATE.start_cstpcpy_~from#1.offset|) 0) (forall ((|v_ULTIMATE.start_cstpcpy_~from#1.offset_89| Int) (v_ArrVal_531 (Array Int Int))) (or (not (<= 0 |v_ULTIMATE.start_cstpcpy_~from#1.offset_89|)) (<= (+ |v_ULTIMATE.start_cstpcpy_~from#1.offset_89| 2) (select |c_#length| |c_ULTIMATE.start_cstpcpy_~from#1.base|)) (not (<= |v_ULTIMATE.start_cstpcpy_~from#1.offset_89| (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_531) |c_ULTIMATE.start_cstpcpy_~from#1.base|) |v_ULTIMATE.start_cstpcpy_~from#1.offset_89|) 0)))) is different from false [2022-11-03 01:36:47,273 WARN L833 $PredicateComparison]: unable to prove that (or (= |c_ULTIMATE.start_cstpcpy_#t~mem4#1| 0) (forall ((v_ArrVal_530 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_530) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)) 0)) (forall ((|v_ULTIMATE.start_cstpcpy_~from#1.offset_89| Int) (v_ArrVal_531 (Array Int Int))) (or (not (<= 0 |v_ULTIMATE.start_cstpcpy_~from#1.offset_89|)) (not (<= |v_ULTIMATE.start_cstpcpy_~from#1.offset_89| (+ 2 |c_ULTIMATE.start_cstpcpy_~from#1.offset|))) (<= (+ |v_ULTIMATE.start_cstpcpy_~from#1.offset_89| 2) (select |c_#length| |c_ULTIMATE.start_cstpcpy_~from#1.base|)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_531) |c_ULTIMATE.start_cstpcpy_~from#1.base|) |v_ULTIMATE.start_cstpcpy_~from#1.offset_89|) 0)))) is different from false [2022-11-03 01:36:47,296 WARN L833 $PredicateComparison]: unable to prove that (or (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~from#1.base|) |c_ULTIMATE.start_cstpcpy_~from#1.offset|) 0) (forall ((v_ArrVal_530 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_530) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)) 0)) (forall ((|v_ULTIMATE.start_cstpcpy_~from#1.offset_89| Int) (v_ArrVal_531 (Array Int Int))) (or (not (<= 0 |v_ULTIMATE.start_cstpcpy_~from#1.offset_89|)) (not (<= |v_ULTIMATE.start_cstpcpy_~from#1.offset_89| (+ 2 |c_ULTIMATE.start_cstpcpy_~from#1.offset|))) (<= (+ |v_ULTIMATE.start_cstpcpy_~from#1.offset_89| 2) (select |c_#length| |c_ULTIMATE.start_cstpcpy_~from#1.base|)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_531) |c_ULTIMATE.start_cstpcpy_~from#1.base|) |v_ULTIMATE.start_cstpcpy_~from#1.offset_89|) 0)))) is different from false [2022-11-03 01:36:47,320 WARN L833 $PredicateComparison]: unable to prove that (or (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)) 0) (forall ((|v_ULTIMATE.start_cstpcpy_~from#1.offset_89| Int) (v_ArrVal_531 (Array Int Int))) (or (not (<= |v_ULTIMATE.start_cstpcpy_~from#1.offset_89| (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 3))) (not (<= 0 |v_ULTIMATE.start_cstpcpy_~from#1.offset_89|)) (<= (+ |v_ULTIMATE.start_cstpcpy_~from#1.offset_89| 2) (select |c_#length| |c_ULTIMATE.start_cstpcpy_~from#1.base|)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_531) |c_ULTIMATE.start_cstpcpy_~from#1.base|) |v_ULTIMATE.start_cstpcpy_~from#1.offset_89|) 0))) (forall ((v_ArrVal_530 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_530) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 2 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0))) is different from false [2022-11-03 01:36:47,346 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_529 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_529) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)) 0)) (forall ((|v_ULTIMATE.start_cstpcpy_~from#1.offset_89| Int) (v_ArrVal_531 (Array Int Int))) (or (not (<= |v_ULTIMATE.start_cstpcpy_~from#1.offset_89| (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 3))) (not (<= 0 |v_ULTIMATE.start_cstpcpy_~from#1.offset_89|)) (<= (+ |v_ULTIMATE.start_cstpcpy_~from#1.offset_89| 2) (select |c_#length| |c_ULTIMATE.start_cstpcpy_~from#1.base|)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_531) |c_ULTIMATE.start_cstpcpy_~from#1.base|) |v_ULTIMATE.start_cstpcpy_~from#1.offset_89|) 0))) (forall ((v_ArrVal_530 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_530) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 2 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0))) is different from false [2022-11-03 01:36:47,397 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:36:47,397 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 46 [2022-11-03 01:36:47,435 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:36:47,436 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 83 treesize of output 108 [2022-11-03 01:36:47,441 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 3 [2022-11-03 01:36:47,456 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 9 treesize of output 7 [2022-11-03 01:36:47,543 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 3 [2022-11-03 01:36:48,356 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 18 not checked. [2022-11-03 01:36:48,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479927836] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:36:48,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [136592502] [2022-11-03 01:36:48,363 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:36:48,364 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:36:48,364 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:36:48,364 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:36:48,364 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:36:48,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:36:48,397 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-03 01:36:48,443 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 01:36:48,481 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 01:36:48,504 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 01:36:48,550 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 01:36:48,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:36:48,640 INFO L356 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-03 01:36:48,641 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-03 01:36:48,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:36:48,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:36:48,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:36:48,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:36:48,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:36:48,752 INFO L356 Elim1Store]: treesize reduction 99, result has 15.4 percent of original size [2022-11-03 01:36:48,752 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 48 treesize of output 52 [2022-11-03 01:36:48,829 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 01:36:48,830 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 01:36:48,907 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:36:50,700 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2752#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (not (<= (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1) (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|))) (= |#NULL.base| 0))' at error location [2022-11-03 01:36:50,700 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:36:50,700 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:36:50,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 18] total 43 [2022-11-03 01:36:50,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559564657] [2022-11-03 01:36:50,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:36:50,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-03 01:36:50,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:36:50,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-03 01:36:50,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1876, Unknown=6, NotChecked=558, Total=2652 [2022-11-03 01:36:50,702 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 44 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 44 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:36:52,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:36:52,043 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2022-11-03 01:36:52,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 01:36:52,048 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 44 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-03 01:36:52,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:36:52,050 INFO L225 Difference]: With dead ends: 36 [2022-11-03 01:36:52,050 INFO L226 Difference]: Without dead ends: 36 [2022-11-03 01:36:52,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 6 IntricatePredicates, 1 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=493, Invalid=3947, Unknown=6, NotChecked=810, Total=5256 [2022-11-03 01:36:52,054 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 21 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:36:52,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 4 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 189 Invalid, 0 Unknown, 204 Unchecked, 0.1s Time] [2022-11-03 01:36:52,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-03 01:36:52,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2022-11-03 01:36:52,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:36:52,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2022-11-03 01:36:52,061 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 27 [2022-11-03 01:36:52,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:36:52,062 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2022-11-03 01:36:52,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 44 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:36:52,062 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2022-11-03 01:36:52,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-03 01:36:52,063 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:36:52,063 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1] [2022-11-03 01:36:52,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-03 01:36:52,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:36:52,268 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-03 01:36:52,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:36:52,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1996379594, now seen corresponding path program 3 times [2022-11-03 01:36:52,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:36:52,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697902185] [2022-11-03 01:36:52,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:36:52,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:36:52,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:36:52,908 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:36:52,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:36:52,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697902185] [2022-11-03 01:36:52,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697902185] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:36:52,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151740993] [2022-11-03 01:36:52,908 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:36:52,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:36:52,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:36:52,910 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:36:52,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-03 01:36:53,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:36:53,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:36:53,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-03 01:36:53,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:36:53,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:36:53,141 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2022-11-03 01:36:53,145 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 01:36:53,978 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:36:53,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:36:54,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:36:54,659 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:36:54,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151740993] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:36:54,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [37320750] [2022-11-03 01:36:54,660 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:36:54,660 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:36:54,661 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:36:54,661 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:36:54,661 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:36:54,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:36:54,709 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-03 01:36:54,750 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 01:36:54,800 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 01:36:54,824 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 01:36:54,878 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 01:36:54,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:36:54,950 INFO L356 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-03 01:36:54,950 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-03 01:36:55,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:36:55,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:36:55,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:36:55,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:36:55,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:36:55,058 INFO L356 Elim1Store]: treesize reduction 99, result has 15.4 percent of original size [2022-11-03 01:36:55,059 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 48 treesize of output 52 [2022-11-03 01:36:55,127 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 01:36:55,128 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 01:36:55,189 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:36:57,004 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3075#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= (select (select |#memory_int| |ULTIMATE.start_cstpcpy_~from#1.base|) |ULTIMATE.start_cstpcpy_~from#1.offset|) |ULTIMATE.start_cstpcpy_#t~mem4#1|) (<= (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1) (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|)) (= (select |#valid| |ULTIMATE.start_cstpcpy_~from#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (not (<= (+ |ULTIMATE.start_cstpcpy_~to#1.offset| 1) (select |#length| |ULTIMATE.start_cstpcpy_~to#1.base|))) (= |#NULL.base| 0))' at error location [2022-11-03 01:36:57,005 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:36:57,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:36:57,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 14] total 39 [2022-11-03 01:36:57,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026283188] [2022-11-03 01:36:57,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:36:57,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-03 01:36:57,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:36:57,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-03 01:36:57,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=2079, Unknown=0, NotChecked=0, Total=2352 [2022-11-03 01:36:57,007 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 41 states, 40 states have (on average 2.1) internal successors, (84), 40 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:36:58,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:36:58,145 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2022-11-03 01:36:58,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 01:36:58,145 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.1) internal successors, (84), 40 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-03 01:36:58,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:36:58,146 INFO L225 Difference]: With dead ends: 34 [2022-11-03 01:36:58,146 INFO L226 Difference]: Without dead ends: 34 [2022-11-03 01:36:58,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=599, Invalid=3183, Unknown=0, NotChecked=0, Total=3782 [2022-11-03 01:36:58,148 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 148 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:36:58,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 0 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:36:58,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-03 01:36:58,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-11-03 01:36:58,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 31 states have (on average 1.096774193548387) internal successors, (34), 32 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:36:58,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2022-11-03 01:36:58,153 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2022-11-03 01:36:58,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:36:58,153 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2022-11-03 01:36:58,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.1) internal successors, (84), 40 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:36:58,154 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2022-11-03 01:36:58,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-03 01:36:58,155 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:36:58,155 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2022-11-03 01:36:58,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-03 01:36:58,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:36:58,360 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-03 01:36:58,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:36:58,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1329591184, now seen corresponding path program 9 times [2022-11-03 01:36:58,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:36:58,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166348433] [2022-11-03 01:36:58,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:36:58,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:36:58,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:36:59,110 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 5 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:36:59,110 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:36:59,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166348433] [2022-11-03 01:36:59,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166348433] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:36:59,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739733814] [2022-11-03 01:36:59,110 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:36:59,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:36:59,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:36:59,112 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:36:59,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1afbea2c-84f9-43d4-978a-1d62f19f4cdf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-03 01:36:59,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:36:59,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:36:59,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-03 01:36:59,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:36:59,710 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 01:36:59,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:36:59,784 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-03 01:36:59,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:36:59,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-03 01:36:59,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:36:59,963 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-03 01:37:00,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:37:00,065 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-03 01:37:00,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:37:00,204 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:37:00,204 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 18 treesize of output 10 [2022-11-03 01:37:00,209 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 5 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:37:00,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:37:00,943 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstpcpy_~to#1.offset_104| Int) (v_ArrVal_650 Int)) (or (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base|) |v_ULTIMATE.start_cstpcpy_~to#1.offset_104| v_ArrVal_650)) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 2 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0) (not (<= |v_ULTIMATE.start_cstpcpy_~to#1.offset_104| (+ |c_ULTIMATE.start_cstpcpy_~to#1.offset| 1))))) is different from false [2022-11-03 01:37:34,414 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstpcpy_~to#1.offset_106| Int) (|v_ULTIMATE.start_cstpcpy_~to#1.offset_104| Int) (|v_ULTIMATE.start_cstpcpy_~to#1.offset_105| Int) (v_ArrVal_650 Int) (v_ArrVal_648 Int) (v_ArrVal_646 Int)) (or (not (<= |v_ULTIMATE.start_cstpcpy_~to#1.offset_105| (+ |v_ULTIMATE.start_cstpcpy_~to#1.offset_106| 1))) (not (<= |v_ULTIMATE.start_cstpcpy_~to#1.offset_106| (+ |c_ULTIMATE.start_cstpcpy_~to#1.offset| 1))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base|) |v_ULTIMATE.start_cstpcpy_~to#1.offset_106| v_ArrVal_646) |v_ULTIMATE.start_cstpcpy_~to#1.offset_105| v_ArrVal_648) |v_ULTIMATE.start_cstpcpy_~to#1.offset_104| v_ArrVal_650)) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 4)) 0) (not (<= |v_ULTIMATE.start_cstpcpy_~to#1.offset_104| (+ |v_ULTIMATE.start_cstpcpy_~to#1.offset_105| 1))))) is different from false [2022-11-03 01:37:36,445 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_643 Int) (|v_ULTIMATE.start_cstpcpy_~to#1.offset_106| Int) (|v_ULTIMATE.start_cstpcpy_~to#1.offset_104| Int) (|v_ULTIMATE.start_cstpcpy_~to#1.offset_105| Int) (v_ArrVal_650 Int) (v_ArrVal_648 Int) (|ULTIMATE.start_cstpcpy_~to#1.base| Int) (v_ArrVal_646 Int)) (or (not (<= |v_ULTIMATE.start_cstpcpy_~to#1.offset_105| (+ |v_ULTIMATE.start_cstpcpy_~to#1.offset_106| 1))) (not (<= |v_ULTIMATE.start_cstpcpy_~to#1.offset_106| (+ |c_ULTIMATE.start_cstpcpy_~to#1.offset| 1))) (= (select (select (store |c_#memory_int| |ULTIMATE.start_cstpcpy_~to#1.base| (store (store (store (store (select |c_#memory_int| |ULTIMATE.start_cstpcpy_~to#1.base|) |c_ULTIMATE.start_cstpcpy_~to#1.offset| v_ArrVal_643) |v_ULTIMATE.start_cstpcpy_~to#1.offset_106| v_ArrVal_646) |v_ULTIMATE.start_cstpcpy_~to#1.offset_105| v_ArrVal_648) |v_ULTIMATE.start_cstpcpy_~to#1.offset_104| v_ArrVal_650)) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 4)) 0) (not (<= |v_ULTIMATE.start_cstpcpy_~to#1.offset_104| (+ |v_ULTIMATE.start_cstpcpy_~to#1.offset_105| 1))))) is different from false [2022-11-03 01:37:36,494 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 48170 treesize of output 47786