./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/bench-exp2x9.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55df45-834f-468e-9e90-caa328e129cf/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55df45-834f-468e-9e90-caa328e129cf/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55df45-834f-468e-9e90-caa328e129cf/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55df45-834f-468e-9e90-caa328e129cf/bin/utaipan-6cKwYrpEi9/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/bench-exp2x9.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55df45-834f-468e-9e90-caa328e129cf/bin/utaipan-6cKwYrpEi9/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55df45-834f-468e-9e90-caa328e129cf/bin/utaipan-6cKwYrpEi9 --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 d6a1dd92aa2998cfb1326128fd549d301e029b328accb048c4d2ec692e416e63 --- 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-6b4ec56 [2022-11-20 19:00:39,044 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 19:00:39,047 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 19:00:39,074 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 19:00:39,075 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 19:00:39,077 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 19:00:39,079 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 19:00:39,081 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 19:00:39,083 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 19:00:39,085 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 19:00:39,086 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 19:00:39,088 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 19:00:39,088 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 19:00:39,090 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 19:00:39,092 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 19:00:39,093 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 19:00:39,095 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 19:00:39,096 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 19:00:39,098 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 19:00:39,101 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 19:00:39,103 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 19:00:39,105 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 19:00:39,107 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 19:00:39,108 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 19:00:39,112 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 19:00:39,113 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 19:00:39,114 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 19:00:39,115 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 19:00:39,116 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 19:00:39,117 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 19:00:39,118 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 19:00:39,119 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 19:00:39,120 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 19:00:39,121 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 19:00:39,123 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 19:00:39,124 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 19:00:39,125 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 19:00:39,125 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 19:00:39,126 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 19:00:39,127 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 19:00:39,128 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 19:00:39,132 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55df45-834f-468e-9e90-caa328e129cf/bin/utaipan-6cKwYrpEi9/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-20 19:00:39,177 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 19:00:39,177 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 19:00:39,178 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 19:00:39,178 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 19:00:39,179 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 19:00:39,179 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 19:00:39,179 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 19:00:39,180 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 19:00:39,180 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 19:00:39,180 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 19:00:39,180 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 19:00:39,181 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 19:00:39,181 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 19:00:39,181 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 19:00:39,181 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 19:00:39,182 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 19:00:39,182 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 19:00:39,182 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 19:00:39,184 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 19:00:39,184 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 19:00:39,184 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 19:00:39,185 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 19:00:39,185 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 19:00:39,185 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 19:00:39,185 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 19:00:39,185 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 19:00:39,186 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 19:00:39,186 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 19:00:39,186 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 19:00:39,186 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 19:00:39,186 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 19:00:39,187 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 19:00:39,187 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 19:00:39,187 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 19:00:39,187 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 19:00:39,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 19:00:39,188 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 19:00:39,188 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 19:00:39,188 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 19:00:39,189 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 19:00:39,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 19:00:39,204 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 19:00:39,205 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_5f55df45-834f-468e-9e90-caa328e129cf/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55df45-834f-468e-9e90-caa328e129cf/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d6a1dd92aa2998cfb1326128fd549d301e029b328accb048c4d2ec692e416e63 [2022-11-20 19:00:39,600 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 19:00:39,660 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 19:00:39,663 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 19:00:39,681 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 19:00:39,681 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 19:00:39,683 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55df45-834f-468e-9e90-caa328e129cf/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/weaver/bench-exp2x9.wvr.c [2022-11-20 19:00:43,267 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 19:00:43,571 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 19:00:43,572 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55df45-834f-468e-9e90-caa328e129cf/sv-benchmarks/c/weaver/bench-exp2x9.wvr.c [2022-11-20 19:00:43,583 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55df45-834f-468e-9e90-caa328e129cf/bin/utaipan-6cKwYrpEi9/data/8462d91f6/3901a7d7591d4279ba3a1517d4fec7fe/FLAG7fbea9021 [2022-11-20 19:00:43,605 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55df45-834f-468e-9e90-caa328e129cf/bin/utaipan-6cKwYrpEi9/data/8462d91f6/3901a7d7591d4279ba3a1517d4fec7fe [2022-11-20 19:00:43,610 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 19:00:43,613 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 19:00:43,617 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 19:00:43,617 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 19:00:43,622 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 19:00:43,624 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:00:43" (1/1) ... [2022-11-20 19:00:43,626 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6eda0634 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:43, skipping insertion in model container [2022-11-20 19:00:43,626 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:00:43" (1/1) ... [2022-11-20 19:00:43,635 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 19:00:43,669 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 19:00:43,994 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55df45-834f-468e-9e90-caa328e129cf/sv-benchmarks/c/weaver/bench-exp2x9.wvr.c[2669,2682] [2022-11-20 19:00:44,009 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 19:00:44,028 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 19:00:44,074 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55df45-834f-468e-9e90-caa328e129cf/sv-benchmarks/c/weaver/bench-exp2x9.wvr.c[2669,2682] [2022-11-20 19:00:44,081 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 19:00:44,106 INFO L208 MainTranslator]: Completed translation [2022-11-20 19:00:44,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:44 WrapperNode [2022-11-20 19:00:44,107 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 19:00:44,109 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 19:00:44,110 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 19:00:44,110 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 19:00:44,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:44" (1/1) ... [2022-11-20 19:00:44,139 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:44" (1/1) ... [2022-11-20 19:00:44,172 INFO L138 Inliner]: procedures = 20, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 91 [2022-11-20 19:00:44,172 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 19:00:44,173 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 19:00:44,173 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 19:00:44,173 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 19:00:44,188 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:44" (1/1) ... [2022-11-20 19:00:44,189 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:44" (1/1) ... [2022-11-20 19:00:44,192 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:44" (1/1) ... [2022-11-20 19:00:44,193 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:44" (1/1) ... [2022-11-20 19:00:44,200 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:44" (1/1) ... [2022-11-20 19:00:44,205 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:44" (1/1) ... [2022-11-20 19:00:44,220 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:44" (1/1) ... [2022-11-20 19:00:44,222 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:44" (1/1) ... [2022-11-20 19:00:44,225 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 19:00:44,226 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 19:00:44,226 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 19:00:44,226 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 19:00:44,227 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:44" (1/1) ... [2022-11-20 19:00:44,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 19:00:44,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55df45-834f-468e-9e90-caa328e129cf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:00:44,264 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55df45-834f-468e-9e90-caa328e129cf/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 19:00:44,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55df45-834f-468e-9e90-caa328e129cf/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 19:00:44,305 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 19:00:44,305 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 19:00:44,306 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 19:00:44,306 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 19:00:44,306 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 19:00:44,306 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-20 19:00:44,307 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-20 19:00:44,307 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-20 19:00:44,307 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-20 19:00:44,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 19:00:44,308 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 19:00:44,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 19:00:44,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 19:00:44,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 19:00:44,309 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 19:00:44,309 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 19:00:44,311 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 19:00:44,440 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 19:00:44,442 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 19:00:44,922 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 19:00:44,932 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 19:00:44,933 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-20 19:00:44,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:00:44 BoogieIcfgContainer [2022-11-20 19:00:44,936 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 19:00:44,939 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 19:00:44,939 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 19:00:44,943 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 19:00:44,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:00:43" (1/3) ... [2022-11-20 19:00:44,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b038388 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:00:44, skipping insertion in model container [2022-11-20 19:00:44,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:00:44" (2/3) ... [2022-11-20 19:00:44,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b038388 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:00:44, skipping insertion in model container [2022-11-20 19:00:44,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:00:44" (3/3) ... [2022-11-20 19:00:44,947 INFO L112 eAbstractionObserver]: Analyzing ICFG bench-exp2x9.wvr.c [2022-11-20 19:00:45,023 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 19:00:45,023 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2022-11-20 19:00:45,024 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 19:00:45,234 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-20 19:00:45,289 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 19:00:45,306 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 172 places, 169 transitions, 370 flow [2022-11-20 19:00:45,308 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 172 places, 169 transitions, 370 flow [2022-11-20 19:00:45,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 169 transitions, 370 flow [2022-11-20 19:00:45,401 INFO L130 PetriNetUnfolder]: 10/165 cut-off events. [2022-11-20 19:00:45,401 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-20 19:00:45,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 165 events. 10/165 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 191 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 111. Up to 2 conditions per place. [2022-11-20 19:00:45,415 INFO L119 LiptonReduction]: Number of co-enabled transitions 4080 [2022-11-20 19:00:54,823 INFO L134 LiptonReduction]: Checked pairs total: 4234 [2022-11-20 19:00:54,824 INFO L136 LiptonReduction]: Total number of compositions: 170 [2022-11-20 19:00:54,841 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 56 places, 47 transitions, 126 flow [2022-11-20 19:00:54,901 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 183 states, 165 states have (on average 4.212121212121212) internal successors, (695), 182 states have internal predecessors, (695), 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) [2022-11-20 19:00:54,924 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 19:00:54,932 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;@440409d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 19:00:54,932 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2022-11-20 19:00:54,936 INFO L276 IsEmpty]: Start isEmpty. Operand has 183 states, 165 states have (on average 4.212121212121212) internal successors, (695), 182 states have internal predecessors, (695), 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) [2022-11-20 19:00:54,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2022-11-20 19:00:54,942 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:00:54,943 INFO L195 NwaCegarLoop]: trace histogram [1] [2022-11-20 19:00:54,944 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-20 19:00:54,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:00:54,951 INFO L85 PathProgramCache]: Analyzing trace with hash 631, now seen corresponding path program 1 times [2022-11-20 19:00:54,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:00:54,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561793863] [2022-11-20 19:00:54,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:00:54,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:00:55,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:00:55,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:00:55,074 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:00:55,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561793863] [2022-11-20 19:00:55,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561793863] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:00:55,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:00:55,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-20 19:00:55,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578662579] [2022-11-20 19:00:55,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:00:55,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 19:00:55,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:00:55,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 19:00:55,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 19:00:55,116 INFO L87 Difference]: Start difference. First operand has 183 states, 165 states have (on average 4.212121212121212) internal successors, (695), 182 states have internal predecessors, (695), 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 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 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) [2022-11-20 19:00:55,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:00:55,234 INFO L93 Difference]: Finished difference Result 180 states and 692 transitions. [2022-11-20 19:00:55,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 19:00:55,237 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 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 1 [2022-11-20 19:00:55,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:00:55,257 INFO L225 Difference]: With dead ends: 180 [2022-11-20 19:00:55,257 INFO L226 Difference]: Without dead ends: 180 [2022-11-20 19:00:55,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 0 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 19:00:55,266 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:00:55,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:00:55,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-11-20 19:00:55,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2022-11-20 19:00:55,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 165 states have (on average 4.193939393939394) internal successors, (692), 179 states have internal predecessors, (692), 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) [2022-11-20 19:00:55,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 692 transitions. [2022-11-20 19:00:55,365 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 692 transitions. Word has length 1 [2022-11-20 19:00:55,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:00:55,366 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 692 transitions. [2022-11-20 19:00:55,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 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) [2022-11-20 19:00:55,367 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 692 transitions. [2022-11-20 19:00:55,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 19:00:55,367 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:00:55,367 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 19:00:55,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 19:00:55,368 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-20 19:00:55,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:00:55,369 INFO L85 PathProgramCache]: Analyzing trace with hash 619163, now seen corresponding path program 1 times [2022-11-20 19:00:55,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:00:55,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412861565] [2022-11-20 19:00:55,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:00:55,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:00:55,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:00:55,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:00:55,871 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:00:55,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412861565] [2022-11-20 19:00:55,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412861565] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:00:55,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:00:55,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 19:00:55,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638687595] [2022-11-20 19:00:55,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:00:55,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:00:55,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:00:55,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:00:55,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:00:55,876 INFO L87 Difference]: Start difference. First operand 180 states and 692 transitions. 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) [2022-11-20 19:00:55,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:00:55,989 INFO L93 Difference]: Finished difference Result 170 states and 656 transitions. [2022-11-20 19:00:55,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:00:55,990 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 [2022-11-20 19:00:55,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:00:55,994 INFO L225 Difference]: With dead ends: 170 [2022-11-20 19:00:55,995 INFO L226 Difference]: Without dead ends: 170 [2022-11-20 19:00:55,995 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 [2022-11-20 19:00:55,996 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 35 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:00:55,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 0 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:00:55,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-11-20 19:00:56,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2022-11-20 19:00:56,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 157 states have (on average 4.178343949044586) internal successors, (656), 169 states have internal predecessors, (656), 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) [2022-11-20 19:00:56,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 656 transitions. [2022-11-20 19:00:56,032 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 656 transitions. Word has length 3 [2022-11-20 19:00:56,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:00:56,033 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 656 transitions. [2022-11-20 19:00:56,033 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) [2022-11-20 19:00:56,033 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 656 transitions. [2022-11-20 19:00:56,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 19:00:56,034 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:00:56,034 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 19:00:56,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 19:00:56,035 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-20 19:00:56,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:00:56,035 INFO L85 PathProgramCache]: Analyzing trace with hash 619164, now seen corresponding path program 1 times [2022-11-20 19:00:56,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:00:56,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203732091] [2022-11-20 19:00:56,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:00:56,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:00:56,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:00:56,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:00:56,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:00:56,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203732091] [2022-11-20 19:00:56,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203732091] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:00:56,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:00:56,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 19:00:56,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511711345] [2022-11-20 19:00:56,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:00:56,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:00:56,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:00:56,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:00:56,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:00:56,464 INFO L87 Difference]: Start difference. First operand 170 states and 656 transitions. 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) [2022-11-20 19:00:56,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:00:56,556 INFO L93 Difference]: Finished difference Result 160 states and 620 transitions. [2022-11-20 19:00:56,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:00:56,557 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 [2022-11-20 19:00:56,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:00:56,565 INFO L225 Difference]: With dead ends: 160 [2022-11-20 19:00:56,565 INFO L226 Difference]: Without dead ends: 160 [2022-11-20 19:00:56,567 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 [2022-11-20 19:00:56,571 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:00:56,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 0 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:00:56,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-20 19:00:56,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2022-11-20 19:00:56,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 149 states have (on average 4.1610738255033555) internal successors, (620), 159 states have internal predecessors, (620), 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) [2022-11-20 19:00:56,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 620 transitions. [2022-11-20 19:00:56,597 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 620 transitions. Word has length 3 [2022-11-20 19:00:56,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:00:56,598 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 620 transitions. [2022-11-20 19:00:56,598 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) [2022-11-20 19:00:56,599 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 620 transitions. [2022-11-20 19:00:56,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 19:00:56,602 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:00:56,602 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 19:00:56,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 19:00:56,603 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-20 19:00:56,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:00:56,604 INFO L85 PathProgramCache]: Analyzing trace with hash 595031177, now seen corresponding path program 1 times [2022-11-20 19:00:56,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:00:56,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167339785] [2022-11-20 19:00:56,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:00:56,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:00:56,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:00:56,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:00:56,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:00:56,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167339785] [2022-11-20 19:00:56,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167339785] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:00:56,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:00:56,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 19:00:56,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811851541] [2022-11-20 19:00:56,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:00:56,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:00:56,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:00:56,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:00:56,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:00:56,764 INFO L87 Difference]: Start difference. First operand 160 states and 620 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2022-11-20 19:00:56,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:00:56,849 INFO L93 Difference]: Finished difference Result 152 states and 596 transitions. [2022-11-20 19:00:56,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:00:56,850 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2022-11-20 19:00:56,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:00:56,853 INFO L225 Difference]: With dead ends: 152 [2022-11-20 19:00:56,853 INFO L226 Difference]: Without dead ends: 152 [2022-11-20 19:00:56,854 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 [2022-11-20 19:00:56,859 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:00:56,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 0 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:00:56,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-11-20 19:00:56,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-11-20 19:00:56,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 143 states have (on average 4.1678321678321675) internal successors, (596), 151 states have internal predecessors, (596), 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) [2022-11-20 19:00:56,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 596 transitions. [2022-11-20 19:00:56,881 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 596 transitions. Word has length 5 [2022-11-20 19:00:56,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:00:56,881 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 596 transitions. [2022-11-20 19:00:56,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2022-11-20 19:00:56,881 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 596 transitions. [2022-11-20 19:00:56,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 19:00:56,882 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:00:56,882 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 19:00:56,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 19:00:56,883 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-20 19:00:56,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:00:56,883 INFO L85 PathProgramCache]: Analyzing trace with hash 595031179, now seen corresponding path program 1 times [2022-11-20 19:00:56,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:00:56,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323887729] [2022-11-20 19:00:56,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:00:56,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:00:56,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:00:56,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:00:56,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:00:56,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323887729] [2022-11-20 19:00:56,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323887729] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:00:56,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:00:56,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 19:00:56,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284553485] [2022-11-20 19:00:56,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:00:56,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:00:56,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:00:56,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:00:56,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:00:56,995 INFO L87 Difference]: Start difference. First operand 152 states and 596 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2022-11-20 19:00:57,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:00:57,063 INFO L93 Difference]: Finished difference Result 144 states and 572 transitions. [2022-11-20 19:00:57,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:00:57,064 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2022-11-20 19:00:57,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:00:57,066 INFO L225 Difference]: With dead ends: 144 [2022-11-20 19:00:57,066 INFO L226 Difference]: Without dead ends: 144 [2022-11-20 19:00:57,067 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 [2022-11-20 19:00:57,067 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 27 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:00:57,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 0 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:00:57,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-11-20 19:00:57,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2022-11-20 19:00:57,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 137 states have (on average 4.175182481751825) internal successors, (572), 143 states have internal predecessors, (572), 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) [2022-11-20 19:00:57,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 572 transitions. [2022-11-20 19:00:57,077 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 572 transitions. Word has length 5 [2022-11-20 19:00:57,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:00:57,078 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 572 transitions. [2022-11-20 19:00:57,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2022-11-20 19:00:57,078 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 572 transitions. [2022-11-20 19:00:57,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 19:00:57,079 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:00:57,079 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:00:57,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 19:00:57,080 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-20 19:00:57,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:00:57,080 INFO L85 PathProgramCache]: Analyzing trace with hash 594325496, now seen corresponding path program 1 times [2022-11-20 19:00:57,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:00:57,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649372680] [2022-11-20 19:00:57,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:00:57,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:00:57,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:00:57,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:00:57,166 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:00:57,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649372680] [2022-11-20 19:00:57,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649372680] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:00:57,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:00:57,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 19:00:57,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283574611] [2022-11-20 19:00:57,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:00:57,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:00:57,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:00:57,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:00:57,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:00:57,169 INFO L87 Difference]: Start difference. First operand 144 states and 572 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2022-11-20 19:00:57,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:00:57,231 INFO L93 Difference]: Finished difference Result 134 states and 536 transitions. [2022-11-20 19:00:57,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:00:57,232 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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 [2022-11-20 19:00:57,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:00:57,234 INFO L225 Difference]: With dead ends: 134 [2022-11-20 19:00:57,234 INFO L226 Difference]: Without dead ends: 134 [2022-11-20 19:00:57,234 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 [2022-11-20 19:00:57,235 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 23 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:00:57,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 0 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:00:57,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-11-20 19:00:57,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2022-11-20 19:00:57,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 129 states have (on average 4.155038759689923) internal successors, (536), 133 states have internal predecessors, (536), 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) [2022-11-20 19:00:57,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 536 transitions. [2022-11-20 19:00:57,244 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 536 transitions. Word has length 7 [2022-11-20 19:00:57,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:00:57,244 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 536 transitions. [2022-11-20 19:00:57,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2022-11-20 19:00:57,245 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 536 transitions. [2022-11-20 19:00:57,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 19:00:57,245 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:00:57,245 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:00:57,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 19:00:57,246 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-20 19:00:57,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:00:57,247 INFO L85 PathProgramCache]: Analyzing trace with hash 594325497, now seen corresponding path program 1 times [2022-11-20 19:00:57,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:00:57,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484763923] [2022-11-20 19:00:57,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:00:57,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:00:57,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:00:57,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:00:57,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:00:57,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484763923] [2022-11-20 19:00:57,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484763923] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:00:57,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:00:57,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 19:00:57,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447637021] [2022-11-20 19:00:57,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:00:57,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:00:57,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:00:57,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:00:57,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:00:57,315 INFO L87 Difference]: Start difference. First operand 134 states and 536 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2022-11-20 19:00:57,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:00:57,374 INFO L93 Difference]: Finished difference Result 124 states and 500 transitions. [2022-11-20 19:00:57,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:00:57,375 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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 [2022-11-20 19:00:57,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:00:57,376 INFO L225 Difference]: With dead ends: 124 [2022-11-20 19:00:57,376 INFO L226 Difference]: Without dead ends: 124 [2022-11-20 19:00:57,377 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 [2022-11-20 19:00:57,378 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 21 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:00:57,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 0 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:00:57,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-11-20 19:00:57,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-11-20 19:00:57,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 121 states have (on average 4.132231404958677) internal successors, (500), 123 states have internal predecessors, (500), 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) [2022-11-20 19:00:57,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 500 transitions. [2022-11-20 19:00:57,386 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 500 transitions. Word has length 7 [2022-11-20 19:00:57,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:00:57,386 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 500 transitions. [2022-11-20 19:00:57,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2022-11-20 19:00:57,387 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 500 transitions. [2022-11-20 19:00:57,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 19:00:57,388 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:00:57,388 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:00:57,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 19:00:57,388 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-20 19:00:57,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:00:57,389 INFO L85 PathProgramCache]: Analyzing trace with hash -83833164, now seen corresponding path program 1 times [2022-11-20 19:00:57,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:00:57,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912456167] [2022-11-20 19:00:57,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:00:57,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:00:57,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:00:57,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:00:57,473 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:00:57,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912456167] [2022-11-20 19:00:57,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912456167] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:00:57,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:00:57,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 19:00:57,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107438790] [2022-11-20 19:00:57,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:00:57,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:00:57,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:00:57,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:00:57,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:00:57,476 INFO L87 Difference]: Start difference. First operand 124 states and 500 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) [2022-11-20 19:00:57,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:00:57,554 INFO L93 Difference]: Finished difference Result 108 states and 420 transitions. [2022-11-20 19:00:57,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:00:57,555 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 9 [2022-11-20 19:00:57,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:00:57,557 INFO L225 Difference]: With dead ends: 108 [2022-11-20 19:00:57,557 INFO L226 Difference]: Without dead ends: 108 [2022-11-20 19:00:57,557 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 [2022-11-20 19:00:57,562 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 18 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:00:57,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 0 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:00:57,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-11-20 19:00:57,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2022-11-20 19:00:57,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 106 states have (on average 3.9622641509433962) internal successors, (420), 107 states have internal predecessors, (420), 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) [2022-11-20 19:00:57,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 420 transitions. [2022-11-20 19:00:57,570 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 420 transitions. Word has length 9 [2022-11-20 19:00:57,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:00:57,570 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 420 transitions. [2022-11-20 19:00:57,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) [2022-11-20 19:00:57,571 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 420 transitions. [2022-11-20 19:00:57,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 19:00:57,572 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:00:57,573 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:00:57,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 19:00:57,573 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-20 19:00:57,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:00:57,574 INFO L85 PathProgramCache]: Analyzing trace with hash -83833162, now seen corresponding path program 1 times [2022-11-20 19:00:57,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:00:57,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952021919] [2022-11-20 19:00:57,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:00:57,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:00:57,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:00:57,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:00:57,844 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:00:57,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952021919] [2022-11-20 19:00:57,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952021919] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:00:57,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:00:57,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 19:00:57,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083536681] [2022-11-20 19:00:57,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:00:57,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 19:00:57,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:00:57,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 19:00:57,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-20 19:00:57,848 INFO L87 Difference]: Start difference. First operand 108 states and 420 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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) [2022-11-20 19:00:57,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:00:57,909 INFO L93 Difference]: Finished difference Result 92 states and 340 transitions. [2022-11-20 19:00:57,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:00:57,910 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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 9 [2022-11-20 19:00:57,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:00:57,911 INFO L225 Difference]: With dead ends: 92 [2022-11-20 19:00:57,911 INFO L226 Difference]: Without dead ends: 92 [2022-11-20 19:00:57,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-20 19:00:57,913 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 49 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:00:57,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 0 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:00:57,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-20 19:00:57,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-11-20 19:00:57,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 3.7362637362637363) internal successors, (340), 91 states have internal predecessors, (340), 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) [2022-11-20 19:00:57,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 340 transitions. [2022-11-20 19:00:57,921 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 340 transitions. Word has length 9 [2022-11-20 19:00:57,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:00:57,922 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 340 transitions. [2022-11-20 19:00:57,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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) [2022-11-20 19:00:57,922 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 340 transitions. [2022-11-20 19:00:57,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-20 19:00:57,925 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:00:57,926 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:00:57,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 19:00:57,926 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-20 19:00:57,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:00:57,927 INFO L85 PathProgramCache]: Analyzing trace with hash -214736832, now seen corresponding path program 1 times [2022-11-20 19:00:57,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:00:57,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800903931] [2022-11-20 19:00:57,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:00:57,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:00:58,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:00:58,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:00:58,278 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:00:58,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800903931] [2022-11-20 19:00:58,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800903931] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:00:58,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:00:58,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 19:00:58,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189930811] [2022-11-20 19:00:58,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:00:58,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:00:58,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:00:58,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:00:58,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:00:58,297 INFO L87 Difference]: Start difference. First operand 92 states and 340 transitions. Second operand has 3 states, 2 states have (on average 10.5) internal successors, (21), 2 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) [2022-11-20 19:00:58,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:00:58,409 INFO L93 Difference]: Finished difference Result 181 states and 677 transitions. [2022-11-20 19:00:58,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:00:58,410 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 10.5) internal successors, (21), 2 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) Word has length 21 [2022-11-20 19:00:58,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:00:58,412 INFO L225 Difference]: With dead ends: 181 [2022-11-20 19:00:58,412 INFO L226 Difference]: Without dead ends: 172 [2022-11-20 19:00:58,412 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 [2022-11-20 19:00:58,413 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:00:58,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:00:58,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-11-20 19:00:58,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2022-11-20 19:00:58,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 3.7953216374269005) internal successors, (649), 171 states have internal predecessors, (649), 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) [2022-11-20 19:00:58,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 649 transitions. [2022-11-20 19:00:58,426 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 649 transitions. Word has length 21 [2022-11-20 19:00:58,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:00:58,427 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 649 transitions. [2022-11-20 19:00:58,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 10.5) internal successors, (21), 2 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) [2022-11-20 19:00:58,428 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 649 transitions. [2022-11-20 19:00:58,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 19:00:58,436 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:00:58,437 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:00:58,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 19:00:58,437 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-20 19:00:58,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:00:58,438 INFO L85 PathProgramCache]: Analyzing trace with hash -355585178, now seen corresponding path program 1 times [2022-11-20 19:00:58,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:00:58,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720901455] [2022-11-20 19:00:58,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:00:58,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:00:58,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:00:58,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:00:58,763 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:00:58,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720901455] [2022-11-20 19:00:58,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720901455] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:00:58,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:00:58,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 19:00:58,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012184270] [2022-11-20 19:00:58,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:00:58,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 19:00:58,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:00:58,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 19:00:58,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 19:00:58,767 INFO L87 Difference]: Start difference. First operand 172 states and 649 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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) [2022-11-20 19:00:59,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:00:59,005 INFO L93 Difference]: Finished difference Result 336 states and 1249 transitions. [2022-11-20 19:00:59,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 19:00:59,005 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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 22 [2022-11-20 19:00:59,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:00:59,009 INFO L225 Difference]: With dead ends: 336 [2022-11-20 19:00:59,009 INFO L226 Difference]: Without dead ends: 336 [2022-11-20 19:00:59,009 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 [2022-11-20 19:00:59,010 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 41 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:00:59,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 0 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 19:00:59,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-11-20 19:00:59,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 216. [2022-11-20 19:00:59,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 4.027906976744186) internal successors, (866), 215 states have internal predecessors, (866), 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) [2022-11-20 19:00:59,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 866 transitions. [2022-11-20 19:00:59,026 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 866 transitions. Word has length 22 [2022-11-20 19:00:59,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:00:59,026 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 866 transitions. [2022-11-20 19:00:59,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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) [2022-11-20 19:00:59,027 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 866 transitions. [2022-11-20 19:00:59,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 19:00:59,028 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:00:59,028 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:00:59,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 19:00:59,029 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-20 19:00:59,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:00:59,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1516631887, now seen corresponding path program 1 times [2022-11-20 19:00:59,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:00:59,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928373859] [2022-11-20 19:00:59,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:00:59,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:00:59,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:00:59,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:00:59,374 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:00:59,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928373859] [2022-11-20 19:00:59,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928373859] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:00:59,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548330063] [2022-11-20 19:00:59,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:00:59,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:00:59,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55df45-834f-468e-9e90-caa328e129cf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:00:59,379 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55df45-834f-468e-9e90-caa328e129cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:00:59,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55df45-834f-468e-9e90-caa328e129cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 19:00:59,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:00:59,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 19:00:59,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:00:59,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:00:59,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:00:59,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:00:59,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548330063] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:00:59,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [683688738] [2022-11-20 19:00:59,927 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-20 19:00:59,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 19:00:59,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-11-20 19:00:59,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040055405] [2022-11-20 19:00:59,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 19:00:59,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 19:00:59,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:00:59,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 19:00:59,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 19:00:59,935 INFO L87 Difference]: Start difference. First operand 216 states and 866 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 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) [2022-11-20 19:01:00,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:01:00,220 INFO L93 Difference]: Finished difference Result 372 states and 1405 transitions. [2022-11-20 19:01:00,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 19:01:00,221 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-20 19:01:00,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:01:00,224 INFO L225 Difference]: With dead ends: 372 [2022-11-20 19:01:00,225 INFO L226 Difference]: Without dead ends: 372 [2022-11-20 19:01:00,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-20 19:01:00,226 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 70 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 19:01:00,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 0 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 19:01:00,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2022-11-20 19:01:00,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 242. [2022-11-20 19:01:00,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 4.062240663900415) internal successors, (979), 241 states have internal predecessors, (979), 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) [2022-11-20 19:01:00,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 979 transitions. [2022-11-20 19:01:00,246 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 979 transitions. Word has length 22 [2022-11-20 19:01:00,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:01:00,247 INFO L495 AbstractCegarLoop]: Abstraction has 242 states and 979 transitions. [2022-11-20 19:01:00,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 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) [2022-11-20 19:01:00,247 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 979 transitions. [2022-11-20 19:01:00,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 19:01:00,249 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:01:00,249 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:01:00,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55df45-834f-468e-9e90-caa328e129cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 19:01:00,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55df45-834f-468e-9e90-caa328e129cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-20 19:01:00,456 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-20 19:01:00,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:01:00,458 INFO L85 PathProgramCache]: Analyzing trace with hash 955297626, now seen corresponding path program 2 times [2022-11-20 19:01:00,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:01:00,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920305494] [2022-11-20 19:01:00,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:01:00,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:01:00,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:01:00,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:01:00,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:01:00,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920305494] [2022-11-20 19:01:00,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920305494] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:01:00,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:01:00,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 19:01:00,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388676332] [2022-11-20 19:01:00,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:01:00,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 19:01:00,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:01:00,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 19:01:00,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 19:01:00,689 INFO L87 Difference]: Start difference. First operand 242 states and 979 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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) [2022-11-20 19:01:00,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:01:00,903 INFO L93 Difference]: Finished difference Result 314 states and 1193 transitions. [2022-11-20 19:01:00,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 19:01:00,904 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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 22 [2022-11-20 19:01:00,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:01:00,906 INFO L225 Difference]: With dead ends: 314 [2022-11-20 19:01:00,906 INFO L226 Difference]: Without dead ends: 312 [2022-11-20 19:01:00,907 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 [2022-11-20 19:01:00,907 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 59 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:01:00,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 0 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 19:01:00,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-11-20 19:01:00,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 254. [2022-11-20 19:01:00,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 3.9565217391304346) internal successors, (1001), 253 states have internal predecessors, (1001), 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) [2022-11-20 19:01:00,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 1001 transitions. [2022-11-20 19:01:00,922 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 1001 transitions. Word has length 22 [2022-11-20 19:01:00,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:01:00,922 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 1001 transitions. [2022-11-20 19:01:00,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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) [2022-11-20 19:01:00,923 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 1001 transitions. [2022-11-20 19:01:00,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 19:01:00,924 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:01:00,924 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:01:00,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 19:01:00,925 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-20 19:01:00,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:01:00,925 INFO L85 PathProgramCache]: Analyzing trace with hash -894561987, now seen corresponding path program 1 times [2022-11-20 19:01:00,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:01:00,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541000328] [2022-11-20 19:01:00,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:01:00,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:01:00,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:01:01,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:01:01,237 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:01:01,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541000328] [2022-11-20 19:01:01,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541000328] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:01:01,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:01:01,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 19:01:01,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592526394] [2022-11-20 19:01:01,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:01:01,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 19:01:01,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:01:01,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 19:01:01,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 19:01:01,242 INFO L87 Difference]: Start difference. First operand 254 states and 1001 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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) [2022-11-20 19:01:01,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:01:01,445 INFO L93 Difference]: Finished difference Result 388 states and 1505 transitions. [2022-11-20 19:01:01,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 19:01:01,446 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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 22 [2022-11-20 19:01:01,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:01:01,450 INFO L225 Difference]: With dead ends: 388 [2022-11-20 19:01:01,450 INFO L226 Difference]: Without dead ends: 374 [2022-11-20 19:01:01,451 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 [2022-11-20 19:01:01,452 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 40 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:01:01,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 0 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 19:01:01,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-11-20 19:01:01,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 316. [2022-11-20 19:01:01,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 4.101587301587301) internal successors, (1292), 315 states have internal predecessors, (1292), 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) [2022-11-20 19:01:01,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 1292 transitions. [2022-11-20 19:01:01,474 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 1292 transitions. Word has length 22 [2022-11-20 19:01:01,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:01:01,474 INFO L495 AbstractCegarLoop]: Abstraction has 316 states and 1292 transitions. [2022-11-20 19:01:01,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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) [2022-11-20 19:01:01,475 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 1292 transitions. [2022-11-20 19:01:01,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 19:01:01,477 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:01:01,477 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:01:01,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 19:01:01,477 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-20 19:01:01,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:01:01,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1205491912, now seen corresponding path program 1 times [2022-11-20 19:01:01,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:01:01,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011814918] [2022-11-20 19:01:01,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:01:01,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:01:01,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:01:01,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:01:01,735 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:01:01,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011814918] [2022-11-20 19:01:01,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011814918] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:01:01,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977237596] [2022-11-20 19:01:01,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:01:01,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:01:01,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55df45-834f-468e-9e90-caa328e129cf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:01:01,737 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55df45-834f-468e-9e90-caa328e129cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:01:01,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55df45-834f-468e-9e90-caa328e129cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 19:01:01,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:01:01,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 19:01:01,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:01:02,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:01:02,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:01:02,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:01:02,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977237596] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:01:02,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [647725574] [2022-11-20 19:01:02,321 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-20 19:01:02,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 19:01:02,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-11-20 19:01:02,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919623112] [2022-11-20 19:01:02,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 19:01:02,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 19:01:02,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:01:02,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 19:01:02,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 19:01:02,331 INFO L87 Difference]: Start difference. First operand 316 states and 1292 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2022-11-20 19:01:02,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:01:02,639 INFO L93 Difference]: Finished difference Result 486 states and 1892 transitions. [2022-11-20 19:01:02,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 19:01:02,640 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 22 [2022-11-20 19:01:02,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:01:02,644 INFO L225 Difference]: With dead ends: 486 [2022-11-20 19:01:02,644 INFO L226 Difference]: Without dead ends: 486 [2022-11-20 19:01:02,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-20 19:01:02,647 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 54 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:01:02,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 0 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 19:01:02,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2022-11-20 19:01:02,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 374. [2022-11-20 19:01:02,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 4.128686327077748) internal successors, (1540), 373 states have internal predecessors, (1540), 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) [2022-11-20 19:01:02,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 1540 transitions. [2022-11-20 19:01:02,670 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 1540 transitions. Word has length 22 [2022-11-20 19:01:02,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:01:02,670 INFO L495 AbstractCegarLoop]: Abstraction has 374 states and 1540 transitions. [2022-11-20 19:01:02,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2022-11-20 19:01:02,671 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 1540 transitions. [2022-11-20 19:01:02,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 19:01:02,673 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:01:02,673 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:01:02,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55df45-834f-468e-9e90-caa328e129cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 19:01:02,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55df45-834f-468e-9e90-caa328e129cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:01:02,881 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-20 19:01:02,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:01:02,881 INFO L85 PathProgramCache]: Analyzing trace with hash -335531559, now seen corresponding path program 2 times [2022-11-20 19:01:02,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:01:02,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884200722] [2022-11-20 19:01:02,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:01:02,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:01:02,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:01:03,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:01:03,098 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:01:03,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884200722] [2022-11-20 19:01:03,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884200722] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:01:03,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664831680] [2022-11-20 19:01:03,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 19:01:03,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:01:03,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55df45-834f-468e-9e90-caa328e129cf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:01:03,101 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55df45-834f-468e-9e90-caa328e129cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:01:03,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55df45-834f-468e-9e90-caa328e129cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 19:01:03,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 19:01:03,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:01:03,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 19:01:03,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:01:03,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:01:03,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:01:03,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:01:03,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664831680] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:01:03,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [42795922] [2022-11-20 19:01:03,497 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-20 19:01:03,498 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 19:01:03,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-11-20 19:01:03,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956492481] [2022-11-20 19:01:03,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 19:01:03,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 19:01:03,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:01:03,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 19:01:03,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 19:01:03,501 INFO L87 Difference]: Start difference. First operand 374 states and 1540 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2022-11-20 19:01:03,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:01:03,768 INFO L93 Difference]: Finished difference Result 482 states and 1944 transitions. [2022-11-20 19:01:03,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 19:01:03,769 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 22 [2022-11-20 19:01:03,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:01:03,773 INFO L225 Difference]: With dead ends: 482 [2022-11-20 19:01:03,773 INFO L226 Difference]: Without dead ends: 482 [2022-11-20 19:01:03,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-20 19:01:03,774 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 28 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:01:03,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 0 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 19:01:03,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-11-20 19:01:03,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 422. [2022-11-20 19:01:03,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 4.199524940617577) internal successors, (1768), 421 states have internal predecessors, (1768), 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) [2022-11-20 19:01:03,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 1768 transitions. [2022-11-20 19:01:03,797 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 1768 transitions. Word has length 22 [2022-11-20 19:01:03,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:01:03,797 INFO L495 AbstractCegarLoop]: Abstraction has 422 states and 1768 transitions. [2022-11-20 19:01:03,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2022-11-20 19:01:03,798 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 1768 transitions. [2022-11-20 19:01:03,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 19:01:03,800 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:01:03,800 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:01:03,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55df45-834f-468e-9e90-caa328e129cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 19:01:04,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55df45-834f-468e-9e90-caa328e129cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 19:01:04,006 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-20 19:01:04,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:01:04,007 INFO L85 PathProgramCache]: Analyzing trace with hash -549603720, now seen corresponding path program 2 times [2022-11-20 19:01:04,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:01:04,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761521369] [2022-11-20 19:01:04,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:01:04,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:01:04,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:01:04,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:01:04,253 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:01:04,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761521369] [2022-11-20 19:01:04,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761521369] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:01:04,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:01:04,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 19:01:04,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176703470] [2022-11-20 19:01:04,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:01:04,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 19:01:04,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:01:04,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 19:01:04,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 19:01:04,256 INFO L87 Difference]: Start difference. First operand 422 states and 1768 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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) [2022-11-20 19:01:04,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:01:04,454 INFO L93 Difference]: Finished difference Result 482 states and 1906 transitions. [2022-11-20 19:01:04,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 19:01:04,455 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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 22 [2022-11-20 19:01:04,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:01:04,459 INFO L225 Difference]: With dead ends: 482 [2022-11-20 19:01:04,459 INFO L226 Difference]: Without dead ends: 474 [2022-11-20 19:01:04,460 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 [2022-11-20 19:01:04,460 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 42 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:01:04,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 0 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 19:01:04,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-11-20 19:01:04,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 442. [2022-11-20 19:01:04,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 4.115646258503402) internal successors, (1815), 441 states have internal predecessors, (1815), 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) [2022-11-20 19:01:04,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1815 transitions. [2022-11-20 19:01:04,485 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1815 transitions. Word has length 22 [2022-11-20 19:01:04,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:01:04,486 INFO L495 AbstractCegarLoop]: Abstraction has 442 states and 1815 transitions. [2022-11-20 19:01:04,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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) [2022-11-20 19:01:04,486 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1815 transitions. [2022-11-20 19:01:04,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 19:01:04,488 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:01:04,489 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:01:04,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-20 19:01:04,489 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-20 19:01:04,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:01:04,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1751615371, now seen corresponding path program 2 times [2022-11-20 19:01:04,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:01:04,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534974619] [2022-11-20 19:01:04,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:01:04,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:01:04,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:01:04,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:01:04,688 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:01:04,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534974619] [2022-11-20 19:01:04,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534974619] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:01:04,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:01:04,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 19:01:04,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084544666] [2022-11-20 19:01:04,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:01:04,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 19:01:04,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:01:04,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 19:01:04,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 19:01:04,690 INFO L87 Difference]: Start difference. First operand 442 states and 1815 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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) [2022-11-20 19:01:04,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:01:04,883 INFO L93 Difference]: Finished difference Result 552 states and 2116 transitions. [2022-11-20 19:01:04,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 19:01:04,884 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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 22 [2022-11-20 19:01:04,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:01:04,888 INFO L225 Difference]: With dead ends: 552 [2022-11-20 19:01:04,888 INFO L226 Difference]: Without dead ends: 538 [2022-11-20 19:01:04,889 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 [2022-11-20 19:01:04,889 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 54 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:01:04,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 0 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 19:01:04,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-11-20 19:01:04,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 478. [2022-11-20 19:01:04,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 4.027253668763103) internal successors, (1921), 477 states have internal predecessors, (1921), 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) [2022-11-20 19:01:04,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1921 transitions. [2022-11-20 19:01:04,916 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1921 transitions. Word has length 22 [2022-11-20 19:01:04,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:01:04,916 INFO L495 AbstractCegarLoop]: Abstraction has 478 states and 1921 transitions. [2022-11-20 19:01:04,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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) [2022-11-20 19:01:04,917 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1921 transitions. [2022-11-20 19:01:04,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-20 19:01:04,919 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:01:04,919 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:01:04,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-20 19:01:04,920 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-20 19:01:04,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:01:04,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1587963317, now seen corresponding path program 1 times [2022-11-20 19:01:04,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:01:04,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069669485] [2022-11-20 19:01:04,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:01:04,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:01:04,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:01:05,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:01:05,805 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:01:05,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069669485] [2022-11-20 19:01:05,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069669485] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:01:05,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539554676] [2022-11-20 19:01:05,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:01:05,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:01:05,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55df45-834f-468e-9e90-caa328e129cf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:01:05,808 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55df45-834f-468e-9e90-caa328e129cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:01:05,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f55df45-834f-468e-9e90-caa328e129cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process