./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0ea2b5a-cc76-4df5-aacb-0b3f1f816067/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0ea2b5a-cc76-4df5-aacb-0b3f1f816067/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0ea2b5a-cc76-4df5-aacb-0b3f1f816067/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0ea2b5a-cc76-4df5-aacb-0b3f1f816067/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0ea2b5a-cc76-4df5-aacb-0b3f1f816067/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0ea2b5a-cc76-4df5-aacb-0b3f1f816067/bin/utaipan-Q6hlc19bkW --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f83ae5bec1717d6f197d4259600c0d1f406909832409df09253b7bf70d3f66fc --- 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-4e7fbc6 [2022-11-23 15:28:29,763 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:28:29,765 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:28:29,790 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:28:29,790 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:28:29,791 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:28:29,793 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:28:29,795 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:28:29,797 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:28:29,798 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:28:29,800 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:28:29,801 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:28:29,802 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:28:29,803 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:28:29,804 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:28:29,806 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:28:29,807 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:28:29,808 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:28:29,810 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:28:29,812 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:28:29,814 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:28:29,815 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:28:29,817 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:28:29,818 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:28:29,822 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:28:29,823 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:28:29,823 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:28:29,824 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:28:29,825 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:28:29,826 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:28:29,827 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:28:29,828 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:28:29,829 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:28:29,830 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:28:29,831 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:28:29,832 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:28:29,833 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:28:29,833 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:28:29,834 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:28:29,835 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:28:29,836 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:28:29,837 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0ea2b5a-cc76-4df5-aacb-0b3f1f816067/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 15:28:29,883 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:28:29,885 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:28:29,885 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:28:29,886 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:28:29,887 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:28:29,887 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:28:29,887 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:28:29,888 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:28:29,888 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:28:29,888 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:28:29,889 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:28:29,890 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:28:29,890 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:28:29,890 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:28:29,891 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:28:29,891 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:28:29,891 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:28:29,891 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:28:29,892 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:28:29,893 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:28:29,893 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:28:29,893 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:28:29,893 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:28:29,894 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:28:29,894 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:28:29,894 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:28:29,894 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:28:29,895 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:28:29,895 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:28:29,895 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:28:29,895 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:28:29,896 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:28:29,896 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:28:29,897 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:28:29,897 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:28:29,897 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:28:29,897 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:28:29,898 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:28:29,898 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:28:29,898 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:28:29,898 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:28:29,899 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_c0ea2b5a-cc76-4df5-aacb-0b3f1f816067/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0ea2b5a-cc76-4df5-aacb-0b3f1f816067/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f83ae5bec1717d6f197d4259600c0d1f406909832409df09253b7bf70d3f66fc [2022-11-23 15:28:30,207 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:28:30,251 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:28:30,254 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:28:30,256 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:28:30,256 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:28:30,258 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0ea2b5a-cc76-4df5-aacb-0b3f1f816067/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2022-11-23 15:28:33,526 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:28:33,777 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:28:33,778 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0ea2b5a-cc76-4df5-aacb-0b3f1f816067/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2022-11-23 15:28:33,786 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0ea2b5a-cc76-4df5-aacb-0b3f1f816067/bin/utaipan-Q6hlc19bkW/data/a3eee8b84/34993ff184b549b5bc2d0ac8c0fda20e/FLAG15e758e51 [2022-11-23 15:28:33,802 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0ea2b5a-cc76-4df5-aacb-0b3f1f816067/bin/utaipan-Q6hlc19bkW/data/a3eee8b84/34993ff184b549b5bc2d0ac8c0fda20e [2022-11-23 15:28:33,805 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:28:33,807 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:28:33,808 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:28:33,808 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:28:33,812 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:28:33,813 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:28:33" (1/1) ... [2022-11-23 15:28:33,814 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2696acff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:33, skipping insertion in model container [2022-11-23 15:28:33,815 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:28:33" (1/1) ... [2022-11-23 15:28:33,824 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:28:33,865 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:28:34,064 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_c0ea2b5a-cc76-4df5-aacb-0b3f1f816067/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c[4232,4245] [2022-11-23 15:28:34,076 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:28:34,087 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:28:34,124 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_c0ea2b5a-cc76-4df5-aacb-0b3f1f816067/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c[4232,4245] [2022-11-23 15:28:34,130 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:28:34,146 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:28:34,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:34 WrapperNode [2022-11-23 15:28:34,147 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:28:34,148 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:28:34,148 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:28:34,148 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:28:34,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:34" (1/1) ... [2022-11-23 15:28:34,165 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:34" (1/1) ... [2022-11-23 15:28:34,206 INFO L138 Inliner]: procedures = 27, calls = 83, calls flagged for inlining = 22, calls inlined = 28, statements flattened = 346 [2022-11-23 15:28:34,207 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:28:34,207 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:28:34,208 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:28:34,208 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:28:34,234 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:34" (1/1) ... [2022-11-23 15:28:34,235 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:34" (1/1) ... [2022-11-23 15:28:34,240 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:34" (1/1) ... [2022-11-23 15:28:34,245 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:34" (1/1) ... [2022-11-23 15:28:34,256 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:34" (1/1) ... [2022-11-23 15:28:34,288 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:34" (1/1) ... [2022-11-23 15:28:34,291 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:34" (1/1) ... [2022-11-23 15:28:34,293 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:34" (1/1) ... [2022-11-23 15:28:34,297 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:28:34,298 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:28:34,298 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:28:34,298 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:28:34,299 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:34" (1/1) ... [2022-11-23 15:28:34,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:28:34,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0ea2b5a-cc76-4df5-aacb-0b3f1f816067/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:28:34,358 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0ea2b5a-cc76-4df5-aacb-0b3f1f816067/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:28:34,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0ea2b5a-cc76-4df5-aacb-0b3f1f816067/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:28:34,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:28:34,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 15:28:34,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 15:28:34,405 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 15:28:34,405 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-23 15:28:34,405 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-23 15:28:34,406 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-23 15:28:34,406 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-23 15:28:34,406 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-23 15:28:34,406 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-23 15:28:34,407 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-23 15:28:34,407 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-23 15:28:34,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:28:34,407 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-23 15:28:34,408 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-23 15:28:34,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 15:28:34,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:28:34,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:28:34,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 15:28:34,411 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 15:28:34,551 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:28:34,554 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:28:35,195 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:28:35,523 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:28:35,523 INFO L300 CfgBuilder]: Removed 7 assume(true) statements. [2022-11-23 15:28:35,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:28:35 BoogieIcfgContainer [2022-11-23 15:28:35,527 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:28:35,529 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:28:35,530 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:28:35,534 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:28:35,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:28:33" (1/3) ... [2022-11-23 15:28:35,535 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20a9b85c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:28:35, skipping insertion in model container [2022-11-23 15:28:35,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:34" (2/3) ... [2022-11-23 15:28:35,535 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20a9b85c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:28:35, skipping insertion in model container [2022-11-23 15:28:35,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:28:35" (3/3) ... [2022-11-23 15:28:35,537 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series2.wvr.c [2022-11-23 15:28:35,548 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-23 15:28:35,560 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:28:35,560 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:28:35,560 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 15:28:35,659 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-23 15:28:35,706 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 15:28:35,723 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 256 places, 265 transitions, 562 flow [2022-11-23 15:28:35,726 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 256 places, 265 transitions, 562 flow [2022-11-23 15:28:35,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 256 places, 265 transitions, 562 flow [2022-11-23 15:28:35,829 INFO L130 PetriNetUnfolder]: 22/261 cut-off events. [2022-11-23 15:28:35,829 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-23 15:28:35,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278 conditions, 261 events. 22/261 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 124 event pairs, 0 based on Foata normal form. 0/238 useless extension candidates. Maximal degree in co-relation 222. Up to 2 conditions per place. [2022-11-23 15:28:35,838 INFO L119 LiptonReduction]: Number of co-enabled transitions 1824 [2022-11-23 15:28:49,468 INFO L134 LiptonReduction]: Checked pairs total: 3256 [2022-11-23 15:28:49,469 INFO L136 LiptonReduction]: Total number of compositions: 268 [2022-11-23 15:28:49,478 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 48 places, 42 transitions, 116 flow [2022-11-23 15:28:49,586 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 527 states, 526 states have (on average 4.098859315589354) internal successors, (2156), 526 states have internal predecessors, (2156), 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) [2022-11-23 15:28:49,604 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:28:49,610 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@770e99fa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:28:49,610 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-23 15:28:49,614 INFO L276 IsEmpty]: Start isEmpty. Operand has 527 states, 526 states have (on average 4.098859315589354) internal successors, (2156), 526 states have internal predecessors, (2156), 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) [2022-11-23 15:28:49,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-23 15:28:49,645 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:28:49,646 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, 1, 1, 1, 1, 1] [2022-11-23 15:28:49,647 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-23 15:28:49,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:28:49,652 INFO L85 PathProgramCache]: Analyzing trace with hash -609270474, now seen corresponding path program 1 times [2022-11-23 15:28:49,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:28:49,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275165419] [2022-11-23 15:28:49,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:28:49,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:28:50,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:28:50,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:28:50,376 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:28:50,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275165419] [2022-11-23 15:28:50,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275165419] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:28:50,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:28:50,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 15:28:50,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029960099] [2022-11-23 15:28:50,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:28:50,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:28:50,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:28:50,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:28:50,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:28:50,429 INFO L87 Difference]: Start difference. First operand has 527 states, 526 states have (on average 4.098859315589354) internal successors, (2156), 526 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:28:50,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:28:50,594 INFO L93 Difference]: Finished difference Result 778 states and 3201 transitions. [2022-11-23 15:28:50,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:28:50,597 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-23 15:28:50,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:28:50,622 INFO L225 Difference]: With dead ends: 778 [2022-11-23 15:28:50,622 INFO L226 Difference]: Without dead ends: 749 [2022-11-23 15:28:50,623 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 [2022-11-23 15:28:50,627 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:28:50,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 12 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:28:50,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-11-23 15:28:50,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 749. [2022-11-23 15:28:50,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 4.124331550802139) internal successors, (3085), 748 states have internal predecessors, (3085), 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) [2022-11-23 15:28:50,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 3085 transitions. [2022-11-23 15:28:50,779 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 3085 transitions. Word has length 28 [2022-11-23 15:28:50,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:28:50,780 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 3085 transitions. [2022-11-23 15:28:50,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:28:50,785 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 3085 transitions. [2022-11-23 15:28:50,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-23 15:28:50,791 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:28:50,792 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:28:50,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:28:50,793 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-23 15:28:50,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:28:50,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1342171935, now seen corresponding path program 1 times [2022-11-23 15:28:50,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:28:50,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478420331] [2022-11-23 15:28:50,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:28:50,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:28:50,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:28:51,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:28:51,061 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:28:51,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478420331] [2022-11-23 15:28:51,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478420331] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:28:51,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:28:51,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:28:51,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689166521] [2022-11-23 15:28:51,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:28:51,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:28:51,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:28:51,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:28:51,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:28:51,073 INFO L87 Difference]: Start difference. First operand 749 states and 3085 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 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) [2022-11-23 15:28:51,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:28:51,219 INFO L93 Difference]: Finished difference Result 1103 states and 4353 transitions. [2022-11-23 15:28:51,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:28:51,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 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 30 [2022-11-23 15:28:51,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:28:51,230 INFO L225 Difference]: With dead ends: 1103 [2022-11-23 15:28:51,230 INFO L226 Difference]: Without dead ends: 1073 [2022-11-23 15:28:51,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:28:51,233 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 16 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:28:51,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 8 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:28:51,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2022-11-23 15:28:51,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 979. [2022-11-23 15:28:51,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 979 states, 978 states have (on average 4.04601226993865) internal successors, (3957), 978 states have internal predecessors, (3957), 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) [2022-11-23 15:28:51,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 979 states to 979 states and 3957 transitions. [2022-11-23 15:28:51,319 INFO L78 Accepts]: Start accepts. Automaton has 979 states and 3957 transitions. Word has length 30 [2022-11-23 15:28:51,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:28:51,320 INFO L495 AbstractCegarLoop]: Abstraction has 979 states and 3957 transitions. [2022-11-23 15:28:51,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 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) [2022-11-23 15:28:51,321 INFO L276 IsEmpty]: Start isEmpty. Operand 979 states and 3957 transitions. [2022-11-23 15:28:51,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-23 15:28:51,326 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:28:51,326 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:28:51,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 15:28:51,330 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-23 15:28:51,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:28:51,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1755720676, now seen corresponding path program 1 times [2022-11-23 15:28:51,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:28:51,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690349177] [2022-11-23 15:28:51,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:28:51,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:28:51,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:28:51,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:28:51,538 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:28:51,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690349177] [2022-11-23 15:28:51,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690349177] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:28:51,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:28:51,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:28:51,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052177085] [2022-11-23 15:28:51,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:28:51,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:28:51,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:28:51,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:28:51,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:28:51,542 INFO L87 Difference]: Start difference. First operand 979 states and 3957 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 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) [2022-11-23 15:28:51,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:28:51,688 INFO L93 Difference]: Finished difference Result 1329 states and 5116 transitions. [2022-11-23 15:28:51,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:28:51,689 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 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 30 [2022-11-23 15:28:51,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:28:51,699 INFO L225 Difference]: With dead ends: 1329 [2022-11-23 15:28:51,699 INFO L226 Difference]: Without dead ends: 1271 [2022-11-23 15:28:51,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:28:51,703 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 11 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:28:51,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 8 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:28:51,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1271 states. [2022-11-23 15:28:51,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1271 to 1149. [2022-11-23 15:28:51,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 1148 states have (on average 3.9634146341463414) internal successors, (4550), 1148 states have internal predecessors, (4550), 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) [2022-11-23 15:28:51,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 4550 transitions. [2022-11-23 15:28:51,758 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 4550 transitions. Word has length 30 [2022-11-23 15:28:51,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:28:51,759 INFO L495 AbstractCegarLoop]: Abstraction has 1149 states and 4550 transitions. [2022-11-23 15:28:51,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 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) [2022-11-23 15:28:51,759 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 4550 transitions. [2022-11-23 15:28:51,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-23 15:28:51,764 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:28:51,764 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:28:51,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 15:28:51,765 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-23 15:28:51,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:28:51,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1990009395, now seen corresponding path program 1 times [2022-11-23 15:28:51,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:28:51,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26227280] [2022-11-23 15:28:51,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:28:51,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:28:51,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:28:51,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:28:51,981 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:28:51,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26227280] [2022-11-23 15:28:51,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26227280] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:28:51,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:28:51,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:28:51,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64143976] [2022-11-23 15:28:51,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:28:51,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:28:51,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:28:51,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:28:51,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:28:51,989 INFO L87 Difference]: Start difference. First operand 1149 states and 4550 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:28:52,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:28:52,245 INFO L93 Difference]: Finished difference Result 2326 states and 8570 transitions. [2022-11-23 15:28:52,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:28:52,246 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-11-23 15:28:52,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:28:52,261 INFO L225 Difference]: With dead ends: 2326 [2022-11-23 15:28:52,261 INFO L226 Difference]: Without dead ends: 2146 [2022-11-23 15:28:52,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:28:52,262 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 72 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:28:52,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 23 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:28:52,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2146 states. [2022-11-23 15:28:52,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2146 to 1460. [2022-11-23 15:28:52,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1459 states have (on average 3.928032899246059) internal successors, (5731), 1459 states have internal predecessors, (5731), 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) [2022-11-23 15:28:52,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 5731 transitions. [2022-11-23 15:28:52,337 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 5731 transitions. Word has length 31 [2022-11-23 15:28:52,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:28:52,338 INFO L495 AbstractCegarLoop]: Abstraction has 1460 states and 5731 transitions. [2022-11-23 15:28:52,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:28:52,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 5731 transitions. [2022-11-23 15:28:52,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-23 15:28:52,344 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:28:52,344 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:28:52,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 15:28:52,345 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-23 15:28:52,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:28:52,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1209659885, now seen corresponding path program 1 times [2022-11-23 15:28:52,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:28:52,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862573074] [2022-11-23 15:28:52,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:28:52,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:28:52,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:28:52,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:28:52,542 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:28:52,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862573074] [2022-11-23 15:28:52,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862573074] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:28:52,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:28:52,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:28:52,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965783206] [2022-11-23 15:28:52,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:28:52,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:28:52,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:28:52,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:28:52,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:28:52,545 INFO L87 Difference]: Start difference. First operand 1460 states and 5731 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:28:52,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:28:52,687 INFO L93 Difference]: Finished difference Result 2075 states and 7793 transitions. [2022-11-23 15:28:52,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:28:52,688 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-11-23 15:28:52,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:28:52,702 INFO L225 Difference]: With dead ends: 2075 [2022-11-23 15:28:52,703 INFO L226 Difference]: Without dead ends: 1945 [2022-11-23 15:28:52,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:28:52,704 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 27 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:28:52,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 18 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:28:52,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1945 states. [2022-11-23 15:28:52,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1945 to 1701. [2022-11-23 15:28:52,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1701 states, 1700 states have (on average 3.91) internal successors, (6647), 1700 states have internal predecessors, (6647), 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) [2022-11-23 15:28:52,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1701 states to 1701 states and 6647 transitions. [2022-11-23 15:28:52,818 INFO L78 Accepts]: Start accepts. Automaton has 1701 states and 6647 transitions. Word has length 31 [2022-11-23 15:28:52,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:28:52,818 INFO L495 AbstractCegarLoop]: Abstraction has 1701 states and 6647 transitions. [2022-11-23 15:28:52,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:28:52,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1701 states and 6647 transitions. [2022-11-23 15:28:52,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-23 15:28:52,825 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:28:52,825 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:28:52,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 15:28:52,826 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-23 15:28:52,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:28:52,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1384350084, now seen corresponding path program 1 times [2022-11-23 15:28:52,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:28:52,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334460660] [2022-11-23 15:28:52,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:28:52,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:28:52,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:28:53,309 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:28:53,309 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:28:53,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334460660] [2022-11-23 15:28:53,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334460660] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:28:53,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:28:53,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:28:53,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186464221] [2022-11-23 15:28:53,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:28:53,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:28:53,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:28:53,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:28:53,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:28:53,312 INFO L87 Difference]: Start difference. First operand 1701 states and 6647 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:28:53,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:28:53,575 INFO L93 Difference]: Finished difference Result 2673 states and 9972 transitions. [2022-11-23 15:28:53,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:28:53,575 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-23 15:28:53,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:28:53,591 INFO L225 Difference]: With dead ends: 2673 [2022-11-23 15:28:53,592 INFO L226 Difference]: Without dead ends: 2544 [2022-11-23 15:28:53,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:28:53,593 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 113 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:28:53,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 4 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:28:53,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2544 states. [2022-11-23 15:28:53,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2544 to 1703. [2022-11-23 15:28:53,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1703 states, 1702 states have (on average 3.9071680376028204) internal successors, (6650), 1702 states have internal predecessors, (6650), 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) [2022-11-23 15:28:53,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 6650 transitions. [2022-11-23 15:28:53,713 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 6650 transitions. Word has length 32 [2022-11-23 15:28:53,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:28:53,715 INFO L495 AbstractCegarLoop]: Abstraction has 1703 states and 6650 transitions. [2022-11-23 15:28:53,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:28:53,715 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 6650 transitions. [2022-11-23 15:28:53,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-23 15:28:53,723 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:28:53,723 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:28:53,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 15:28:53,724 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-23 15:28:53,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:28:53,724 INFO L85 PathProgramCache]: Analyzing trace with hash -7143092, now seen corresponding path program 1 times [2022-11-23 15:28:53,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:28:53,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636810436] [2022-11-23 15:28:53,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:28:53,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:28:53,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:28:54,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:28:54,199 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:28:54,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636810436] [2022-11-23 15:28:54,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636810436] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:28:54,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:28:54,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:28:54,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762025713] [2022-11-23 15:28:54,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:28:54,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:28:54,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:28:54,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:28:54,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:28:54,201 INFO L87 Difference]: Start difference. First operand 1703 states and 6650 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:28:54,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:28:54,431 INFO L93 Difference]: Finished difference Result 1945 states and 7331 transitions. [2022-11-23 15:28:54,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:28:54,431 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-23 15:28:54,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:28:54,443 INFO L225 Difference]: With dead ends: 1945 [2022-11-23 15:28:54,443 INFO L226 Difference]: Without dead ends: 1794 [2022-11-23 15:28:54,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:28:54,444 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 78 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:28:54,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 5 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:28:54,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1794 states. [2022-11-23 15:28:54,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1794 to 1704. [2022-11-23 15:28:54,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1704 states, 1703 states have (on average 3.9048737522019965) internal successors, (6650), 1703 states have internal predecessors, (6650), 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) [2022-11-23 15:28:54,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1704 states to 1704 states and 6650 transitions. [2022-11-23 15:28:54,561 INFO L78 Accepts]: Start accepts. Automaton has 1704 states and 6650 transitions. Word has length 32 [2022-11-23 15:28:54,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:28:54,561 INFO L495 AbstractCegarLoop]: Abstraction has 1704 states and 6650 transitions. [2022-11-23 15:28:54,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:28:54,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1704 states and 6650 transitions. [2022-11-23 15:28:54,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-23 15:28:54,568 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:28:54,568 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:28:54,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 15:28:54,568 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-23 15:28:54,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:28:54,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1879078934, now seen corresponding path program 1 times [2022-11-23 15:28:54,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:28:54,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171062483] [2022-11-23 15:28:54,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:28:54,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:28:54,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:28:54,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:28:54,894 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:28:54,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171062483] [2022-11-23 15:28:54,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171062483] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:28:54,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:28:54,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:28:54,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019562384] [2022-11-23 15:28:54,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:28:54,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:28:54,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:28:54,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:28:54,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:28:54,897 INFO L87 Difference]: Start difference. First operand 1704 states and 6650 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:28:55,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:28:55,108 INFO L93 Difference]: Finished difference Result 1864 states and 7200 transitions. [2022-11-23 15:28:55,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:28:55,108 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-23 15:28:55,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:28:55,118 INFO L225 Difference]: With dead ends: 1864 [2022-11-23 15:28:55,118 INFO L226 Difference]: Without dead ends: 1493 [2022-11-23 15:28:55,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:28:55,120 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 81 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:28:55,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 2 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:28:55,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1493 states. [2022-11-23 15:28:55,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1493 to 1253. [2022-11-23 15:28:55,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1253 states, 1252 states have (on average 3.9400958466453675) internal successors, (4933), 1252 states have internal predecessors, (4933), 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) [2022-11-23 15:28:55,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 4933 transitions. [2022-11-23 15:28:55,168 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 4933 transitions. Word has length 33 [2022-11-23 15:28:55,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:28:55,169 INFO L495 AbstractCegarLoop]: Abstraction has 1253 states and 4933 transitions. [2022-11-23 15:28:55,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:28:55,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 4933 transitions. [2022-11-23 15:28:55,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-23 15:28:55,174 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:28:55,174 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:28:55,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 15:28:55,175 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-23 15:28:55,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:28:55,175 INFO L85 PathProgramCache]: Analyzing trace with hash -634537254, now seen corresponding path program 1 times [2022-11-23 15:28:55,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:28:55,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712822022] [2022-11-23 15:28:55,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:28:55,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:28:55,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:28:55,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:28:55,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:28:55,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712822022] [2022-11-23 15:28:55,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712822022] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:28:55,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551952344] [2022-11-23 15:28:55,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:28:55,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:28:55,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0ea2b5a-cc76-4df5-aacb-0b3f1f816067/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:28:55,527 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0ea2b5a-cc76-4df5-aacb-0b3f1f816067/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:28:55,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0ea2b5a-cc76-4df5-aacb-0b3f1f816067/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:28:55,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:28:55,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 15:28:55,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:28:55,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:28:55,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:28:56,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:28:56,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551952344] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 15:28:56,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:28:56,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 5] total 13 [2022-11-23 15:28:56,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932236628] [2022-11-23 15:28:56,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:28:56,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:28:56,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:28:56,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:28:56,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-11-23 15:28:56,014 INFO L87 Difference]: Start difference. First operand 1253 states and 4933 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:28:56,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:28:56,381 INFO L93 Difference]: Finished difference Result 1283 states and 4769 transitions. [2022-11-23 15:28:56,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 15:28:56,382 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-23 15:28:56,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:28:56,387 INFO L225 Difference]: With dead ends: 1283 [2022-11-23 15:28:56,388 INFO L226 Difference]: Without dead ends: 1018 [2022-11-23 15:28:56,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-11-23 15:28:56,388 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 150 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:28:56,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 6 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:28:56,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2022-11-23 15:28:56,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 890. [2022-11-23 15:28:56,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 3.953880764904387) internal successors, (3515), 889 states have internal predecessors, (3515), 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) [2022-11-23 15:28:56,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 3515 transitions. [2022-11-23 15:28:56,442 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 3515 transitions. Word has length 33 [2022-11-23 15:28:56,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:28:56,443 INFO L495 AbstractCegarLoop]: Abstraction has 890 states and 3515 transitions. [2022-11-23 15:28:56,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:28:56,443 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 3515 transitions. [2022-11-23 15:28:56,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-23 15:28:56,447 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:28:56,447 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:28:56,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0ea2b5a-cc76-4df5-aacb-0b3f1f816067/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-23 15:28:56,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0ea2b5a-cc76-4df5-aacb-0b3f1f816067/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:28:56,655 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-23 15:28:56,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:28:56,656 INFO L85 PathProgramCache]: Analyzing trace with hash 8008640, now seen corresponding path program 1 times [2022-11-23 15:28:56,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:28:56,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804344508] [2022-11-23 15:28:56,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:28:56,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:28:56,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:28:57,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 15:28:57,080 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:28:57,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804344508] [2022-11-23 15:28:57,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804344508] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:28:57,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415519044] [2022-11-23 15:28:57,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:28:57,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:28:57,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0ea2b5a-cc76-4df5-aacb-0b3f1f816067/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:28:57,082 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0ea2b5a-cc76-4df5-aacb-0b3f1f816067/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:28:57,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0ea2b5a-cc76-4df5-aacb-0b3f1f816067/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 15:28:57,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:28:57,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 15:28:57,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:28:57,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 15:28:57,324 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:28:57,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415519044] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:28:57,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:28:57,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-23 15:28:57,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905700047] [2022-11-23 15:28:57,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:28:57,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:28:57,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:28:57,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:28:57,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:28:57,326 INFO L87 Difference]: Start difference. First operand 890 states and 3515 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 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) [2022-11-23 15:28:57,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:28:57,518 INFO L93 Difference]: Finished difference Result 1632 states and 6503 transitions. [2022-11-23 15:28:57,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:28:57,519 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 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 35 [2022-11-23 15:28:57,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:28:57,533 INFO L225 Difference]: With dead ends: 1632 [2022-11-23 15:28:57,534 INFO L226 Difference]: Without dead ends: 1632 [2022-11-23 15:28:57,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-23 15:28:57,535 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 90 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:28:57,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 24 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:28:57,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1632 states. [2022-11-23 15:28:57,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1632 to 1068. [2022-11-23 15:28:57,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1068 states, 1067 states have (on average 3.980318650421743) internal successors, (4247), 1067 states have internal predecessors, (4247), 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) [2022-11-23 15:28:57,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 4247 transitions. [2022-11-23 15:28:57,622 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 4247 transitions. Word has length 35 [2022-11-23 15:28:57,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:28:57,623 INFO L495 AbstractCegarLoop]: Abstraction has 1068 states and 4247 transitions. [2022-11-23 15:28:57,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 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) [2022-11-23 15:28:57,624 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 4247 transitions. [2022-11-23 15:28:57,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-23 15:28:57,628 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:28:57,628 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:28:57,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0ea2b5a-cc76-4df5-aacb-0b3f1f816067/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 15:28:57,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0ea2b5a-cc76-4df5-aacb-0b3f1f816067/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:28:57,835 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-23 15:28:57,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:28:57,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1205083325, now seen corresponding path program 1 times [2022-11-23 15:28:57,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:28:57,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110456533] [2022-11-23 15:28:57,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:28:57,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:28:57,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:28:58,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 15:28:58,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:28:58,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110456533] [2022-11-23 15:28:58,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110456533] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:28:58,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697926802] [2022-11-23 15:28:58,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:28:58,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:28:58,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0ea2b5a-cc76-4df5-aacb-0b3f1f816067/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:28:58,117 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0ea2b5a-cc76-4df5-aacb-0b3f1f816067/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:28:58,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0ea2b5a-cc76-4df5-aacb-0b3f1f816067/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 15:28:58,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:28:58,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 15:28:58,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:28:58,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 15:28:58,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:28:58,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697926802] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:28:58,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:28:58,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2022-11-23 15:28:58,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476144852] [2022-11-23 15:28:58,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:28:58,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:28:58,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:28:58,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:28:58,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:28:58,458 INFO L87 Difference]: Start difference. First operand 1068 states and 4247 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 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) [2022-11-23 15:28:58,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:28:58,746 INFO L93 Difference]: Finished difference Result 2074 states and 8319 transitions. [2022-11-23 15:28:58,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:28:58,747 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 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 35 [2022-11-23 15:28:58,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:28:58,759 INFO L225 Difference]: With dead ends: 2074 [2022-11-23 15:28:58,759 INFO L226 Difference]: Without dead ends: 2074 [2022-11-23 15:28:58,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-23 15:28:58,760 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 86 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:28:58,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 18 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:28:58,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2022-11-23 15:28:58,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 1424. [2022-11-23 15:28:58,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1424 states, 1423 states have (on average 4.0913562895291635) internal successors, (5822), 1423 states have internal predecessors, (5822), 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) [2022-11-23 15:28:58,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1424 states to 1424 states and 5822 transitions. [2022-11-23 15:28:58,859 INFO L78 Accepts]: Start accepts. Automaton has 1424 states and 5822 transitions. Word has length 35 [2022-11-23 15:28:58,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:28:58,860 INFO L495 AbstractCegarLoop]: Abstraction has 1424 states and 5822 transitions. [2022-11-23 15:28:58,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 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) [2022-11-23 15:28:58,860 INFO L276 IsEmpty]: Start isEmpty. Operand 1424 states and 5822 transitions. [2022-11-23 15:28:58,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-23 15:28:58,868 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:28:58,868 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:28:58,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0ea2b5a-cc76-4df5-aacb-0b3f1f816067/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 15:28:59,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0ea2b5a-cc76-4df5-aacb-0b3f1f816067/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:28:59,075 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-23 15:28:59,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:28:59,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1650006381, now seen corresponding path program 2 times [2022-11-23 15:28:59,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:28:59,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073035617] [2022-11-23 15:28:59,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:28:59,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:28:59,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:28:59,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 15:28:59,394 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:28:59,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073035617] [2022-11-23 15:28:59,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073035617] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:28:59,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:28:59,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:28:59,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081793863] [2022-11-23 15:28:59,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:28:59,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:28:59,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:28:59,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:28:59,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:28:59,396 INFO L87 Difference]: Start difference. First operand 1424 states and 5822 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 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) [2022-11-23 15:28:59,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:28:59,608 INFO L93 Difference]: Finished difference Result 2100 states and 8515 transitions. [2022-11-23 15:28:59,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:28:59,609 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 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 35 [2022-11-23 15:28:59,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:28:59,621 INFO L225 Difference]: With dead ends: 2100 [2022-11-23 15:28:59,621 INFO L226 Difference]: Without dead ends: 2100 [2022-11-23 15:28:59,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:28:59,622 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 81 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:28:59,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 24 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:28:59,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2100 states. [2022-11-23 15:28:59,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2100 to 1046. [2022-11-23 15:28:59,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 1045 states have (on average 3.9473684210526314) internal successors, (4125), 1045 states have internal predecessors, (4125), 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) [2022-11-23 15:28:59,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 4125 transitions. [2022-11-23 15:28:59,674 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 4125 transitions. Word has length 35 [2022-11-23 15:28:59,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:28:59,675 INFO L495 AbstractCegarLoop]: Abstraction has 1046 states and 4125 transitions. [2022-11-23 15:28:59,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 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) [2022-11-23 15:28:59,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 4125 transitions. [2022-11-23 15:28:59,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-23 15:28:59,679 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:28:59,679 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:28:59,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 15:28:59,680 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-23 15:28:59,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:28:59,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1970358336, now seen corresponding path program 2 times [2022-11-23 15:28:59,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:28:59,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875013447] [2022-11-23 15:28:59,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:28:59,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:28:59,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:29:00,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 15:29:00,064 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:29:00,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875013447] [2022-11-23 15:29:00,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875013447] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:29:00,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:29:00,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:29:00,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081183625] [2022-11-23 15:29:00,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:29:00,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:29:00,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:29:00,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:29:00,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:29:00,066 INFO L87 Difference]: Start difference. First operand 1046 states and 4125 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 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) [2022-11-23 15:29:00,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:29:00,266 INFO L93 Difference]: Finished difference Result 1338 states and 5293 transitions. [2022-11-23 15:29:00,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:29:00,267 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 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 35 [2022-11-23 15:29:00,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:29:00,273 INFO L225 Difference]: With dead ends: 1338 [2022-11-23 15:29:00,273 INFO L226 Difference]: Without dead ends: 1338 [2022-11-23 15:29:00,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:29:00,274 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 74 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 2 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 [2022-11-23 15:29:00,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 2 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:29:00,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1338 states. [2022-11-23 15:29:00,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1338 to 966. [2022-11-23 15:29:00,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 966 states, 965 states have (on average 3.9181347150259067) internal successors, (3781), 965 states have internal predecessors, (3781), 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) [2022-11-23 15:29:00,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 3781 transitions. [2022-11-23 15:29:00,313 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 3781 transitions. Word has length 35 [2022-11-23 15:29:00,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:29:00,314 INFO L495 AbstractCegarLoop]: Abstraction has 966 states and 3781 transitions. [2022-11-23 15:29:00,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 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) [2022-11-23 15:29:00,314 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 3781 transitions. [2022-11-23 15:29:00,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-23 15:29:00,318 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:29:00,318 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:29:00,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 15:29:00,319 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-23 15:29:00,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:29:00,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1783334644, now seen corresponding path program 1 times [2022-11-23 15:29:00,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:29:00,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242012537] [2022-11-23 15:29:00,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:29:00,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:29:00,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:29:04,435 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:29:04,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:29:04,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242012537] [2022-11-23 15:29:04,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242012537] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:29:04,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548409445] [2022-11-23 15:29:04,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:29:04,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:29:04,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0ea2b5a-cc76-4df5-aacb-0b3f1f816067/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:29:04,437 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0ea2b5a-cc76-4df5-aacb-0b3f1f816067/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:29:04,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0ea2b5a-cc76-4df5-aacb-0b3f1f816067/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 15:29:04,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:29:04,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-23 15:29:04,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:29:05,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:29:05,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:29:05,639 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:29:05,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 27 [2022-11-23 15:29:06,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:29:06,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:29:06,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:29:06,104 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-23 15:29:06,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 45 [2022-11-23 15:29:06,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:29:06,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:29:06,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:29:06,249 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-23 15:29:06,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 45 [2022-11-23 15:29:06,607 INFO L321 Elim1Store]: treesize reduction 16, result has 69.8 percent of original size [2022-11-23 15:29:06,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 50 [2022-11-23 15:29:06,665 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:29:06,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:29:06,911 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~q2~0.offset (* c_~q2_front~0 4))) (.cse2 (+ (* c_~q1_front~0 4) c_~q1~0.offset))) (and (forall ((v_ArrVal_643 (Array Int Int))) (< 0 (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_643))) (+ (select (select .cse0 c_~q2~0.base) .cse1) (select (select .cse0 c_~q1~0.base) .cse2) c_~total~0 1)))) (forall ((v_ArrVal_643 (Array Int Int))) (<= (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_643))) (+ (select (select .cse3 c_~q2~0.base) .cse1) (select (select .cse3 c_~q1~0.base) .cse2) c_~total~0)) 0)))) is different from false [2022-11-23 15:29:06,940 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~q2~0.offset (* c_~q2_front~0 4))) (.cse2 (+ (* c_~q1_front~0 4) c_~q1~0.offset))) (and (forall ((v_ArrVal_643 (Array Int Int)) (v_ArrVal_642 (Array Int Int))) (< 0 (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_642) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_643))) (+ (select (select .cse0 c_~q2~0.base) .cse1) (select (select .cse0 c_~q1~0.base) .cse2) c_~total~0 1)))) (forall ((v_ArrVal_643 (Array Int Int)) (v_ArrVal_642 (Array Int Int))) (<= (let ((.cse3 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_642) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_643))) (+ (select (select .cse3 c_~q2~0.base) .cse1) (select (select .cse3 c_~q1~0.base) .cse2) c_~total~0)) 0)))) is different from false [2022-11-23 15:29:07,212 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ (* c_~q1_front~0 4) c_~q1~0.offset)) (.cse2 (* c_~q2_front~0 4)) (.cse4 (* c_~q2_back~0 4)) (.cse5 (+ c_~f~0.offset (* c_~j~0 4)))) (and (forall ((~q2~0.offset Int) (v_ArrVal_641 (Array Int Int))) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_641))) (or (forall ((v_ArrVal_643 (Array Int Int)) (v_ArrVal_642 (Array Int Int))) (< 0 (let ((.cse0 (store (store .cse3 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_642) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_643))) (+ (select (select .cse0 c_~q1~0.base) .cse1) (select (select .cse0 c_~q2~0.base) (+ ~q2~0.offset .cse2)) c_~total~0 1)))) (not (= (+ (select (select .cse3 c_~q2~0.base) (+ ~q2~0.offset .cse4)) (select (select .cse3 c_~f~0.base) .cse5)) 0))))) (forall ((~q2~0.offset Int) (v_ArrVal_641 (Array Int Int))) (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_641))) (or (forall ((v_ArrVal_643 (Array Int Int)) (v_ArrVal_642 (Array Int Int))) (<= (let ((.cse6 (store (store .cse7 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_642) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_643))) (+ (select (select .cse6 c_~q1~0.base) .cse1) (select (select .cse6 c_~q2~0.base) (+ ~q2~0.offset .cse2)) c_~total~0)) 0)) (not (= (+ (select (select .cse7 c_~q2~0.base) (+ ~q2~0.offset .cse4)) (select (select .cse7 c_~f~0.base) .cse5)) 0))))))) is different from false [2022-11-23 15:29:08,197 INFO L321 Elim1Store]: treesize reduction 19, result has 96.0 percent of original size [2022-11-23 15:29:08,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 29918 treesize of output 28247 [2022-11-23 15:29:08,972 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:29:08,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27785 treesize of output 27086 [2022-11-23 15:29:09,313 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:29:09,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26993 treesize of output 23938 [2022-11-23 15:29:09,734 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:29:09,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23921 treesize of output 22402 [2022-11-23 15:29:10,148 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:29:10,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 22385 treesize of output 21686 [2022-11-23 15:29:10,487 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:29:10,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21593 treesize of output 18538 [2022-11-23 15:29:10,781 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:29:10,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18521 treesize of output 17002