./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f9b434f3343269d91303305376bff127738dc22172486554888e346753333fd7 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-02 20:19:48,787 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:19:48,789 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:19:48,819 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:19:48,819 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:19:48,821 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:19:48,822 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:19:48,824 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:19:48,825 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:19:48,826 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:19:48,827 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:19:48,828 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:19:48,829 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:19:48,830 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:19:48,831 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:19:48,832 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:19:48,833 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:19:48,834 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:19:48,835 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:19:48,837 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:19:48,839 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:19:48,840 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:19:48,841 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:19:48,842 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:19:48,846 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:19:48,846 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:19:48,847 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:19:48,848 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:19:48,848 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:19:48,849 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:19:48,850 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:19:48,851 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:19:48,852 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:19:48,852 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:19:48,854 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:19:48,854 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:19:48,855 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:19:48,855 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:19:48,855 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:19:48,856 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:19:48,857 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:19:48,858 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-02 20:19:48,895 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:19:48,901 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:19:48,902 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:19:48,902 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:19:48,904 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:19:48,904 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:19:48,905 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:19:48,905 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:19:48,905 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:19:48,905 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:19:48,907 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:19:48,907 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-02 20:19:48,907 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:19:48,907 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:19:48,908 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:19:48,908 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:19:48,908 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:19:48,908 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:19:48,908 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-02 20:19:48,909 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:19:48,909 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:19:48,909 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:19:48,909 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:19:48,910 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:19:48,910 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:19:48,910 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:19:48,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:19:48,911 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:19:48,911 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:19:48,911 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:19:48,912 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:19:48,912 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:19:48,913 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:19:48,913 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_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f9b434f3343269d91303305376bff127738dc22172486554888e346753333fd7 [2022-11-02 20:19:49,204 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:19:49,232 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:19:49,235 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:19:49,237 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:19:49,238 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:19:49,239 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c [2022-11-02 20:19:49,314 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/data/c7a6d71ff/5d8fd4dbc1ef40018a2803ca7bbe4adc/FLAGdde4463c5 [2022-11-02 20:19:49,855 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:19:49,856 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c [2022-11-02 20:19:49,869 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/data/c7a6d71ff/5d8fd4dbc1ef40018a2803ca7bbe4adc/FLAGdde4463c5 [2022-11-02 20:19:50,162 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/data/c7a6d71ff/5d8fd4dbc1ef40018a2803ca7bbe4adc [2022-11-02 20:19:50,164 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:19:50,166 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:19:50,170 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:19:50,170 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:19:50,174 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:19:50,176 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:19:50" (1/1) ... [2022-11-02 20:19:50,179 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53e87d62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:19:50, skipping insertion in model container [2022-11-02 20:19:50,179 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:19:50" (1/1) ... [2022-11-02 20:19:50,188 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:19:50,221 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:19:50,479 WARN L230 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_763b5596-7e51-4dba-8278-7ed60e3d76bc/sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c[3056,3069] [2022-11-02 20:19:50,485 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:19:50,495 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:19:50,527 WARN L230 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_763b5596-7e51-4dba-8278-7ed60e3d76bc/sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c[3056,3069] [2022-11-02 20:19:50,535 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:19:50,565 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:19:50,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:19:50 WrapperNode [2022-11-02 20:19:50,568 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:19:50,569 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:19:50,570 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:19:50,570 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:19:50,578 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:19:50" (1/1) ... [2022-11-02 20:19:50,592 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:19:50" (1/1) ... [2022-11-02 20:19:50,620 INFO L138 Inliner]: procedures = 25, calls = 50, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 176 [2022-11-02 20:19:50,620 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:19:50,621 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:19:50,621 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:19:50,622 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:19:50,631 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:19:50" (1/1) ... [2022-11-02 20:19:50,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:19:50" (1/1) ... [2022-11-02 20:19:50,635 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:19:50" (1/1) ... [2022-11-02 20:19:50,635 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:19:50" (1/1) ... [2022-11-02 20:19:50,644 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:19:50" (1/1) ... [2022-11-02 20:19:50,649 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:19:50" (1/1) ... [2022-11-02 20:19:50,651 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:19:50" (1/1) ... [2022-11-02 20:19:50,652 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:19:50" (1/1) ... [2022-11-02 20:19:50,655 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:19:50,656 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:19:50,656 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:19:50,656 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:19:50,657 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:19:50" (1/1) ... [2022-11-02 20:19:50,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:19:50,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:19:50,692 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:19:50,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:19:50,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:19:50,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:19:50,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:19:50,734 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:19:50,734 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-02 20:19:50,735 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-02 20:19:50,735 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-02 20:19:50,735 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-02 20:19:50,735 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-02 20:19:50,735 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-02 20:19:50,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:19:50,736 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-02 20:19:50,736 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-02 20:19:50,736 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-02 20:19:50,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:19:50,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:19:50,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:19:50,738 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-02 20:19:50,899 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:19:50,902 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:19:51,362 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:19:51,531 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:19:51,538 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-02 20:19:51,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:19:51 BoogieIcfgContainer [2022-11-02 20:19:51,542 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:19:51,545 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:19:51,547 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:19:51,551 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:19:51,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:19:50" (1/3) ... [2022-11-02 20:19:51,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@967d616 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:19:51, skipping insertion in model container [2022-11-02 20:19:51,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:19:50" (2/3) ... [2022-11-02 20:19:51,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@967d616 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:19:51, skipping insertion in model container [2022-11-02 20:19:51,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:19:51" (3/3) ... [2022-11-02 20:19:51,561 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-prod-cons.wvr.c [2022-11-02 20:19:51,574 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-02 20:19:51,609 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:19:51,609 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-11-02 20:19:51,610 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-02 20:19:51,733 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-02 20:19:51,788 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-02 20:19:51,807 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 168 places, 169 transitions, 362 flow [2022-11-02 20:19:51,812 INFO L112 LiptonReduction]: Starting Lipton reduction on Petri net that has 168 places, 169 transitions, 362 flow [2022-11-02 20:19:51,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 168 places, 169 transitions, 362 flow [2022-11-02 20:19:51,902 INFO L130 PetriNetUnfolder]: 11/166 cut-off events. [2022-11-02 20:19:51,908 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-02 20:19:51,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 166 events. 11/166 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 145 event pairs, 0 based on Foata normal form. 0/145 useless extension candidates. Maximal degree in co-relation 136. Up to 3 conditions per place. [2022-11-02 20:19:51,915 INFO L118 LiptonReduction]: Number of co-enabled transitions 1690 [2022-11-02 20:20:00,540 INFO L133 LiptonReduction]: Checked pairs total: 3904 [2022-11-02 20:20:00,540 INFO L135 LiptonReduction]: Total number of compositions: 178 [2022-11-02 20:20:00,557 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 45 places, 38 transitions, 100 flow [2022-11-02 20:20:00,626 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 481 states, 454 states have (on average 3.0859030837004404) internal successors, (1401), 480 states have internal predecessors, (1401), 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) [2022-11-02 20:20:00,648 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:20:00,655 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;@65f70881, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:20:00,655 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2022-11-02 20:20:00,659 INFO L276 IsEmpty]: Start isEmpty. Operand has 481 states, 454 states have (on average 3.0859030837004404) internal successors, (1401), 480 states have internal predecessors, (1401), 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) [2022-11-02 20:20:00,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-02 20:20:00,665 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:20:00,666 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-02 20:20:00,666 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-02 20:20:00,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:20:00,672 INFO L85 PathProgramCache]: Analyzing trace with hash 23290, now seen corresponding path program 1 times [2022-11-02 20:20:00,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:20:00,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016629743] [2022-11-02 20:20:00,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:20:00,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:20:00,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:20:01,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:20:01,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:20:01,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016629743] [2022-11-02 20:20:01,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016629743] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:20:01,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:20:01,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-02 20:20:01,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585003855] [2022-11-02 20:20:01,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:20:01,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:20:01,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:20:01,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:20:01,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:20:01,108 INFO L87 Difference]: Start difference. First operand has 481 states, 454 states have (on average 3.0859030837004404) internal successors, (1401), 480 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-02 20:20:01,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:20:01,301 INFO L93 Difference]: Finished difference Result 755 states and 2195 transitions. [2022-11-02 20:20:01,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:20:01,308 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-11-02 20:20:01,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:20:01,331 INFO L225 Difference]: With dead ends: 755 [2022-11-02 20:20:01,332 INFO L226 Difference]: Without dead ends: 751 [2022-11-02 20:20:01,333 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 [2022-11-02 20:20:01,336 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 25 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:20:01,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 4 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:20:01,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2022-11-02 20:20:01,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 378. [2022-11-02 20:20:01,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 361 states have (on average 3.03601108033241) internal successors, (1096), 377 states have internal predecessors, (1096), 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) [2022-11-02 20:20:01,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1096 transitions. [2022-11-02 20:20:01,454 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1096 transitions. Word has length 2 [2022-11-02 20:20:01,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:20:01,455 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 1096 transitions. [2022-11-02 20:20:01,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-02 20:20:01,456 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1096 transitions. [2022-11-02 20:20:01,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-02 20:20:01,456 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:20:01,457 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-02 20:20:01,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:20:01,458 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-02 20:20:01,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:20:01,460 INFO L85 PathProgramCache]: Analyzing trace with hash 723208, now seen corresponding path program 1 times [2022-11-02 20:20:01,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:20:01,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86175447] [2022-11-02 20:20:01,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:20:01,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:20:01,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:20:01,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:20:01,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:20:01,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86175447] [2022-11-02 20:20:01,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86175447] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:20:01,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634689867] [2022-11-02 20:20:01,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:20:01,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:20:01,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:20:01,640 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:20:01,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:20:01,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:20:01,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:20:01,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:20:01,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:20:01,853 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:20:01,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634689867] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:20:01,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:20:01,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2022-11-02 20:20:01,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496845990] [2022-11-02 20:20:01,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:20:01,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:20:01,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:20:01,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:20:01,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:20:01,856 INFO L87 Difference]: Start difference. First operand 378 states and 1096 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:20:02,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:20:02,033 INFO L93 Difference]: Finished difference Result 750 states and 2184 transitions. [2022-11-02 20:20:02,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:20:02,034 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-02 20:20:02,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:20:02,044 INFO L225 Difference]: With dead ends: 750 [2022-11-02 20:20:02,045 INFO L226 Difference]: Without dead ends: 750 [2022-11-02 20:20:02,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:20:02,047 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 52 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:20:02,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 6 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:20:02,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2022-11-02 20:20:02,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 377. [2022-11-02 20:20:02,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 361 states have (on average 3.033240997229917) internal successors, (1095), 376 states have internal predecessors, (1095), 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) [2022-11-02 20:20:02,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1095 transitions. [2022-11-02 20:20:02,106 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1095 transitions. Word has length 3 [2022-11-02 20:20:02,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:20:02,107 INFO L495 AbstractCegarLoop]: Abstraction has 377 states and 1095 transitions. [2022-11-02 20:20:02,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:20:02,108 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1095 transitions. [2022-11-02 20:20:02,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-02 20:20:02,108 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:20:02,108 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-02 20:20:02,144 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-02 20:20:02,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:20:02,322 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-02 20:20:02,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:20:02,323 INFO L85 PathProgramCache]: Analyzing trace with hash 723209, now seen corresponding path program 1 times [2022-11-02 20:20:02,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:20:02,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953958828] [2022-11-02 20:20:02,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:20:02,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:20:02,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:20:02,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:20:02,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:20:02,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953958828] [2022-11-02 20:20:02,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953958828] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:20:02,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781899133] [2022-11-02 20:20:02,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:20:02,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:20:02,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:20:02,403 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:20:02,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:20:02,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:20:02,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:20:02,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:20:02,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:20:02,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:20:02,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:20:02,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781899133] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:20:02,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:20:02,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-11-02 20:20:02,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611930909] [2022-11-02 20:20:02,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:20:02,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:20:02,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:20:02,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:20:02,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:20:02,558 INFO L87 Difference]: Start difference. First operand 377 states and 1095 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:20:02,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:20:02,876 INFO L93 Difference]: Finished difference Result 1872 states and 5457 transitions. [2022-11-02 20:20:02,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:20:02,876 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-02 20:20:02,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:20:02,890 INFO L225 Difference]: With dead ends: 1872 [2022-11-02 20:20:02,891 INFO L226 Difference]: Without dead ends: 1872 [2022-11-02 20:20:02,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:20:02,892 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 150 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:20:02,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 10 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:20:02,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1872 states. [2022-11-02 20:20:02,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1872 to 380. [2022-11-02 20:20:02,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 364 states have (on average 3.0247252747252746) internal successors, (1101), 379 states have internal predecessors, (1101), 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) [2022-11-02 20:20:02,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1101 transitions. [2022-11-02 20:20:02,926 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1101 transitions. Word has length 3 [2022-11-02 20:20:02,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:20:02,926 INFO L495 AbstractCegarLoop]: Abstraction has 380 states and 1101 transitions. [2022-11-02 20:20:02,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:20:02,927 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1101 transitions. [2022-11-02 20:20:02,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-02 20:20:02,927 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:20:02,927 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-02 20:20:02,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:20:03,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:20:03,155 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-02 20:20:03,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:20:03,155 INFO L85 PathProgramCache]: Analyzing trace with hash 71462523, now seen corresponding path program 2 times [2022-11-02 20:20:03,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:20:03,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554525151] [2022-11-02 20:20:03,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:20:03,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:20:03,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:20:03,374 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:20:03,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:20:03,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554525151] [2022-11-02 20:20:03,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554525151] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:20:03,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519742805] [2022-11-02 20:20:03,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:20:03,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:20:03,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:20:03,381 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:20:03,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:20:03,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-02 20:20:03,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:20:03,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 20:20:03,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:20:03,486 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-02 20:20:03,486 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:20:03,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519742805] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:20:03,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:20:03,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2022-11-02 20:20:03,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660793445] [2022-11-02 20:20:03,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:20:03,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:20:03,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:20:03,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:20:03,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:20:03,488 INFO L87 Difference]: Start difference. First operand 380 states and 1101 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:20:03,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:20:03,537 INFO L93 Difference]: Finished difference Result 379 states and 1100 transitions. [2022-11-02 20:20:03,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:20:03,538 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-02 20:20:03,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:20:03,541 INFO L225 Difference]: With dead ends: 379 [2022-11-02 20:20:03,541 INFO L226 Difference]: Without dead ends: 379 [2022-11-02 20:20:03,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:20:03,542 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:20:03,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 2 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:20:03,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-11-02 20:20:03,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 375. [2022-11-02 20:20:03,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 360 states have (on average 3.033333333333333) internal successors, (1092), 374 states have internal predecessors, (1092), 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) [2022-11-02 20:20:03,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 1092 transitions. [2022-11-02 20:20:03,557 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 1092 transitions. Word has length 6 [2022-11-02 20:20:03,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:20:03,558 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 1092 transitions. [2022-11-02 20:20:03,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:20:03,558 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 1092 transitions. [2022-11-02 20:20:03,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-02 20:20:03,558 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:20:03,559 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-02 20:20:03,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:20:03,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:20:03,786 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-02 20:20:03,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:20:03,787 INFO L85 PathProgramCache]: Analyzing trace with hash 83122865, now seen corresponding path program 1 times [2022-11-02 20:20:03,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:20:03,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669320516] [2022-11-02 20:20:03,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:20:03,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:20:03,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:20:03,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:20:03,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:20:03,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669320516] [2022-11-02 20:20:03,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669320516] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:20:03,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:20:03,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:20:03,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738462382] [2022-11-02 20:20:03,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:20:03,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:20:03,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:20:03,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:20:03,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:20:03,869 INFO L87 Difference]: Start difference. First operand 375 states and 1092 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-11-02 20:20:03,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:20:03,961 INFO L93 Difference]: Finished difference Result 325 states and 944 transitions. [2022-11-02 20:20:03,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:20:03,962 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-02 20:20:03,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:20:03,965 INFO L225 Difference]: With dead ends: 325 [2022-11-02 20:20:03,966 INFO L226 Difference]: Without dead ends: 325 [2022-11-02 20:20:03,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:20:03,968 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 41 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:20:03,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 3 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:20:03,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-11-02 20:20:03,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 325. [2022-11-02 20:20:03,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 314 states have (on average 3.0063694267515926) internal successors, (944), 324 states have internal predecessors, (944), 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) [2022-11-02 20:20:03,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 944 transitions. [2022-11-02 20:20:03,998 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 944 transitions. Word has length 6 [2022-11-02 20:20:03,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:20:03,999 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 944 transitions. [2022-11-02 20:20:04,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-11-02 20:20:04,000 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 944 transitions. [2022-11-02 20:20:04,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-02 20:20:04,001 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:20:04,001 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-02 20:20:04,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 20:20:04,001 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-02 20:20:04,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:20:04,002 INFO L85 PathProgramCache]: Analyzing trace with hash 83122899, now seen corresponding path program 1 times [2022-11-02 20:20:04,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:20:04,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896970126] [2022-11-02 20:20:04,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:20:04,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:20:04,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:20:04,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:20:04,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:20:04,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896970126] [2022-11-02 20:20:04,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896970126] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:20:04,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:20:04,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:20:04,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976264201] [2022-11-02 20:20:04,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:20:04,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:20:04,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:20:04,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:20:04,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:20:04,087 INFO L87 Difference]: Start difference. First operand 325 states and 944 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-11-02 20:20:04,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:20:04,173 INFO L93 Difference]: Finished difference Result 275 states and 796 transitions. [2022-11-02 20:20:04,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:20:04,174 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-02 20:20:04,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:20:04,176 INFO L225 Difference]: With dead ends: 275 [2022-11-02 20:20:04,176 INFO L226 Difference]: Without dead ends: 275 [2022-11-02 20:20:04,177 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 [2022-11-02 20:20:04,181 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:20:04,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 4 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:20:04,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-11-02 20:20:04,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2022-11-02 20:20:04,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 268 states have (on average 2.970149253731343) internal successors, (796), 274 states have internal predecessors, (796), 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) [2022-11-02 20:20:04,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 796 transitions. [2022-11-02 20:20:04,196 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 796 transitions. Word has length 6 [2022-11-02 20:20:04,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:20:04,197 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 796 transitions. [2022-11-02 20:20:04,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-11-02 20:20:04,197 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 796 transitions. [2022-11-02 20:20:04,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-02 20:20:04,198 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:20:04,198 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-02 20:20:04,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-02 20:20:04,199 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-02 20:20:04,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:20:04,204 INFO L85 PathProgramCache]: Analyzing trace with hash 83122776, now seen corresponding path program 1 times [2022-11-02 20:20:04,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:20:04,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045515176] [2022-11-02 20:20:04,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:20:04,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:20:04,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:20:04,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:20:04,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:20:04,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045515176] [2022-11-02 20:20:04,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045515176] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:20:04,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:20:04,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:20:04,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556118717] [2022-11-02 20:20:04,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:20:04,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:20:04,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:20:04,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:20:04,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:20:04,337 INFO L87 Difference]: Start difference. First operand 275 states and 796 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-11-02 20:20:04,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:20:04,468 INFO L93 Difference]: Finished difference Result 359 states and 985 transitions. [2022-11-02 20:20:04,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:20:04,469 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-02 20:20:04,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:20:04,471 INFO L225 Difference]: With dead ends: 359 [2022-11-02 20:20:04,471 INFO L226 Difference]: Without dead ends: 276 [2022-11-02 20:20:04,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:20:04,473 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 26 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:20:04,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 6 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:20:04,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-11-02 20:20:04,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 276. [2022-11-02 20:20:04,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 269 states have (on average 2.962825278810409) internal successors, (797), 275 states have internal predecessors, (797), 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) [2022-11-02 20:20:04,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 797 transitions. [2022-11-02 20:20:04,486 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 797 transitions. Word has length 6 [2022-11-02 20:20:04,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:20:04,486 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 797 transitions. [2022-11-02 20:20:04,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-11-02 20:20:04,487 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 797 transitions. [2022-11-02 20:20:04,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-02 20:20:04,487 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:20:04,488 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:20:04,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-02 20:20:04,488 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-02 20:20:04,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:20:04,494 INFO L85 PathProgramCache]: Analyzing trace with hash -2067967642, now seen corresponding path program 1 times [2022-11-02 20:20:04,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:20:04,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255795622] [2022-11-02 20:20:04,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:20:04,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:20:04,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:20:04,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:20:04,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:20:04,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255795622] [2022-11-02 20:20:04,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255795622] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:20:04,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567791884] [2022-11-02 20:20:04,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:20:04,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:20:04,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:20:04,628 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:20:04,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:20:04,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:20:04,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:20:04,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:20:04,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:20:04,757 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:20:04,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567791884] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:20:04,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:20:04,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2022-11-02 20:20:04,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977143791] [2022-11-02 20:20:04,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:20:04,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:20:04,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:20:04,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:20:04,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:20:04,761 INFO L87 Difference]: Start difference. First operand 276 states and 797 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:20:04,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:20:04,803 INFO L93 Difference]: Finished difference Result 198 states and 567 transitions. [2022-11-02 20:20:04,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:20:04,803 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-02 20:20:04,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:20:04,805 INFO L225 Difference]: With dead ends: 198 [2022-11-02 20:20:04,805 INFO L226 Difference]: Without dead ends: 180 [2022-11-02 20:20:04,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:20:04,809 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 17 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:20:04,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 2 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:20:04,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-11-02 20:20:04,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2022-11-02 20:20:04,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 178 states have (on average 2.8820224719101124) internal successors, (513), 179 states have internal predecessors, (513), 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) [2022-11-02 20:20:04,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 513 transitions. [2022-11-02 20:20:04,818 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 513 transitions. Word has length 7 [2022-11-02 20:20:04,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:20:04,818 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 513 transitions. [2022-11-02 20:20:04,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:20:04,818 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 513 transitions. [2022-11-02 20:20:04,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-02 20:20:04,820 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:20:04,820 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:20:04,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:20:05,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:20:05,038 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-02 20:20:05,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:20:05,039 INFO L85 PathProgramCache]: Analyzing trace with hash 322791355, now seen corresponding path program 1 times [2022-11-02 20:20:05,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:20:05,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834755755] [2022-11-02 20:20:05,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:20:05,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:20:05,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:20:05,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:20:05,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:20:05,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834755755] [2022-11-02 20:20:05,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834755755] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:20:05,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:20:05,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-02 20:20:05,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975946328] [2022-11-02 20:20:05,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:20:05,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:20:05,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:20:05,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:20:05,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:20:05,165 INFO L87 Difference]: Start difference. First operand 180 states and 513 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:20:05,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:20:05,228 INFO L93 Difference]: Finished difference Result 206 states and 553 transitions. [2022-11-02 20:20:05,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:20:05,229 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-02 20:20:05,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:20:05,230 INFO L225 Difference]: With dead ends: 206 [2022-11-02 20:20:05,230 INFO L226 Difference]: Without dead ends: 184 [2022-11-02 20:20:05,231 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 [2022-11-02 20:20:05,231 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 9 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:20:05,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 3 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:20:05,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-11-02 20:20:05,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2022-11-02 20:20:05,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 182 states have (on average 2.7637362637362637) internal successors, (503), 183 states have internal predecessors, (503), 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) [2022-11-02 20:20:05,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 503 transitions. [2022-11-02 20:20:05,240 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 503 transitions. Word has length 8 [2022-11-02 20:20:05,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:20:05,240 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 503 transitions. [2022-11-02 20:20:05,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:20:05,240 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 503 transitions. [2022-11-02 20:20:05,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-02 20:20:05,241 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:20:05,241 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:20:05,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-02 20:20:05,242 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-02 20:20:05,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:20:05,242 INFO L85 PathProgramCache]: Analyzing trace with hash -158594899, now seen corresponding path program 1 times [2022-11-02 20:20:05,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:20:05,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54174617] [2022-11-02 20:20:05,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:20:05,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:20:05,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:20:06,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:20:06,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:20:06,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54174617] [2022-11-02 20:20:06,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54174617] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:20:06,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872023045] [2022-11-02 20:20:06,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:20:06,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:20:06,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:20:06,036 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:20:06,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:20:06,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:20:06,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-02 20:20:06,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:20:06,242 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-02 20:20:06,317 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:20:06,377 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:20:06,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:20:06,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:20:06,873 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:20:06,874 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 50 [2022-11-02 20:20:06,893 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:20:06,894 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 148 treesize of output 144 [2022-11-02 20:20:06,919 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:20:06,920 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 120 [2022-11-02 20:20:06,937 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:20:06,937 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 83 [2022-11-02 20:20:07,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:20:07,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872023045] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:20:07,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:20:07,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2022-11-02 20:20:07,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634935140] [2022-11-02 20:20:07,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:20:07,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-02 20:20:07,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:20:07,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-02 20:20:07,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=198, Unknown=2, NotChecked=0, Total=272 [2022-11-02 20:20:07,469 INFO L87 Difference]: Start difference. First operand 184 states and 503 transitions. Second operand has 17 states, 16 states have (on average 2.0625) internal successors, (33), 16 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) [2022-11-02 20:20:08,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:20:08,039 INFO L93 Difference]: Finished difference Result 309 states and 839 transitions. [2022-11-02 20:20:08,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 20:20:08,040 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 16 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 11 [2022-11-02 20:20:08,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:20:08,042 INFO L225 Difference]: With dead ends: 309 [2022-11-02 20:20:08,042 INFO L226 Difference]: Without dead ends: 309 [2022-11-02 20:20:08,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=147, Invalid=402, Unknown=3, NotChecked=0, Total=552 [2022-11-02 20:20:08,043 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 56 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:20:08,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 15 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 125 Invalid, 0 Unknown, 102 Unchecked, 0.2s Time] [2022-11-02 20:20:08,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-11-02 20:20:08,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 299. [2022-11-02 20:20:08,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 297 states have (on average 2.760942760942761) internal successors, (820), 298 states have internal predecessors, (820), 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) [2022-11-02 20:20:08,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 820 transitions. [2022-11-02 20:20:08,056 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 820 transitions. Word has length 11 [2022-11-02 20:20:08,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:20:08,056 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 820 transitions. [2022-11-02 20:20:08,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 16 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) [2022-11-02 20:20:08,057 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 820 transitions. [2022-11-02 20:20:08,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-02 20:20:08,063 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:20:08,063 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:20:08,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:20:08,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-02 20:20:08,284 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-02 20:20:08,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:20:08,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1645535313, now seen corresponding path program 2 times [2022-11-02 20:20:08,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:20:08,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910023224] [2022-11-02 20:20:08,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:20:08,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:20:08,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:20:08,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:20:08,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:20:08,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910023224] [2022-11-02 20:20:08,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910023224] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:20:08,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574758265] [2022-11-02 20:20:08,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:20:08,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:20:08,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:20:08,913 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:20:08,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:20:09,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-02 20:20:09,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:20:09,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 20:20:09,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:20:09,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:20:09,184 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-02 20:20:09,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:20:09,218 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:20:09,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574758265] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:20:09,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:20:09,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 9 [2022-11-02 20:20:09,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81114570] [2022-11-02 20:20:09,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:20:09,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:20:09,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:20:09,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:20:09,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:20:09,220 INFO L87 Difference]: Start difference. First operand 299 states and 820 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:20:09,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:20:09,330 INFO L93 Difference]: Finished difference Result 340 states and 961 transitions. [2022-11-02 20:20:09,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:20:09,330 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-02 20:20:09,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:20:09,333 INFO L225 Difference]: With dead ends: 340 [2022-11-02 20:20:09,333 INFO L226 Difference]: Without dead ends: 340 [2022-11-02 20:20:09,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:20:09,334 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 36 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:20:09,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 6 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:20:09,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-11-02 20:20:09,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 248. [2022-11-02 20:20:09,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 246 states have (on average 2.83739837398374) internal successors, (698), 247 states have internal predecessors, (698), 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) [2022-11-02 20:20:09,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 698 transitions. [2022-11-02 20:20:09,346 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 698 transitions. Word has length 11 [2022-11-02 20:20:09,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:20:09,347 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 698 transitions. [2022-11-02 20:20:09,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:20:09,347 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 698 transitions. [2022-11-02 20:20:09,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-02 20:20:09,348 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:20:09,348 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:20:09,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:20:09,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-02 20:20:09,574 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-02 20:20:09,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:20:09,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1645535314, now seen corresponding path program 1 times [2022-11-02 20:20:09,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:20:09,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321195906] [2022-11-02 20:20:09,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:20:09,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:20:09,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:20:10,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:20:10,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:20:10,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321195906] [2022-11-02 20:20:10,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321195906] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:20:10,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104192003] [2022-11-02 20:20:10,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:20:10,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:20:10,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:20:10,243 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:20:10,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:20:10,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:20:10,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-02 20:20:10,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:20:10,434 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-02 20:20:10,502 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:20:10,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:20:10,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-02 20:20:10,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:20:10,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:20:10,719 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_369 (Array Int Int))) (< 0 (+ 2147483649 c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_369) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))))) is different from false [2022-11-02 20:20:10,955 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:20:10,956 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 48 [2022-11-02 20:20:10,971 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:20:10,972 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 202 treesize of output 190 [2022-11-02 20:20:10,992 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:20:10,993 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 96 [2022-11-02 20:20:11,002 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 118 [2022-11-02 20:20:11,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:20:11,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104192003] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:20:11,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:20:11,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2022-11-02 20:20:11,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428848187] [2022-11-02 20:20:11,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:20:11,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-02 20:20:11,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:20:11,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-02 20:20:11,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=192, Unknown=1, NotChecked=28, Total=272 [2022-11-02 20:20:11,275 INFO L87 Difference]: Start difference. First operand 248 states and 698 transitions. Second operand has 17 states, 16 states have (on average 2.0625) internal successors, (33), 16 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) [2022-11-02 20:20:11,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:20:11,811 INFO L93 Difference]: Finished difference Result 345 states and 952 transitions. [2022-11-02 20:20:11,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:20:11,812 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 16 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 11 [2022-11-02 20:20:11,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:20:11,814 INFO L225 Difference]: With dead ends: 345 [2022-11-02 20:20:11,814 INFO L226 Difference]: Without dead ends: 345 [2022-11-02 20:20:11,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=82, Invalid=341, Unknown=1, NotChecked=38, Total=462 [2022-11-02 20:20:11,816 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 37 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:20:11,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 18 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 205 Invalid, 0 Unknown, 124 Unchecked, 0.2s Time] [2022-11-02 20:20:11,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-11-02 20:20:11,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 326. [2022-11-02 20:20:11,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 324 states have (on average 2.787037037037037) internal successors, (903), 325 states have internal predecessors, (903), 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) [2022-11-02 20:20:11,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 903 transitions. [2022-11-02 20:20:11,831 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 903 transitions. Word has length 11 [2022-11-02 20:20:11,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:20:11,831 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 903 transitions. [2022-11-02 20:20:11,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 16 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) [2022-11-02 20:20:11,832 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 903 transitions. [2022-11-02 20:20:11,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-02 20:20:11,833 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:20:11,833 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:20:11,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:20:12,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-02 20:20:12,058 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-02 20:20:12,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:20:12,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1465300384, now seen corresponding path program 2 times [2022-11-02 20:20:12,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:20:12,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026647787] [2022-11-02 20:20:12,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:20:12,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:20:12,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:20:12,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:20:12,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:20:12,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026647787] [2022-11-02 20:20:12,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026647787] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:20:12,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577572179] [2022-11-02 20:20:12,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:20:12,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:20:12,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:20:12,799 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:20:12,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:20:12,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-02 20:20:12,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:20:12,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-02 20:20:12,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:20:13,034 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:20:13,035 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:20:13,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577572179] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:20:13,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:20:13,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 7 [2022-11-02 20:20:13,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733829743] [2022-11-02 20:20:13,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:20:13,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:20:13,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:20:13,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:20:13,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:20:13,038 INFO L87 Difference]: Start difference. First operand 326 states and 903 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:20:13,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:20:13,116 INFO L93 Difference]: Finished difference Result 344 states and 932 transitions. [2022-11-02 20:20:13,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:20:13,117 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-02 20:20:13,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:20:13,120 INFO L225 Difference]: With dead ends: 344 [2022-11-02 20:20:13,120 INFO L226 Difference]: Without dead ends: 344 [2022-11-02 20:20:13,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:20:13,121 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 14 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:20:13,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 5 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:20:13,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-11-02 20:20:13,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 249. [2022-11-02 20:20:13,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 247 states have (on average 2.7449392712550607) internal successors, (678), 248 states have internal predecessors, (678), 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) [2022-11-02 20:20:13,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 678 transitions. [2022-11-02 20:20:13,136 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 678 transitions. Word has length 12 [2022-11-02 20:20:13,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:20:13,136 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 678 transitions. [2022-11-02 20:20:13,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:20:13,137 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 678 transitions. [2022-11-02 20:20:13,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-02 20:20:13,138 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:20:13,138 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:20:13,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:20:13,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:20:13,351 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-02 20:20:13,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:20:13,352 INFO L85 PathProgramCache]: Analyzing trace with hash -621473165, now seen corresponding path program 1 times [2022-11-02 20:20:13,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:20:13,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887270527] [2022-11-02 20:20:13,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:20:13,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:20:13,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:20:13,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:20:13,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:20:13,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887270527] [2022-11-02 20:20:13,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887270527] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:20:13,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469117859] [2022-11-02 20:20:13,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:20:13,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:20:13,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:20:13,922 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:20:13,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:20:14,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:20:14,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-02 20:20:14,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:20:14,123 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-02 20:20:14,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:20:14,219 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-02 20:20:14,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:20:14,306 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-02 20:20:14,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:20:14,493 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-02 20:20:14,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:20:14,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:20:14,571 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_462 (Array Int Int))) (< (+ c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_462) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) 2147483648)) is different from false [2022-11-02 20:20:14,807 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:20:14,808 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2022-11-02 20:20:14,823 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:20:14,824 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 681 treesize of output 653 [2022-11-02 20:20:14,838 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 638 treesize of output 590 [2022-11-02 20:20:14,851 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 590 treesize of output 494 [2022-11-02 20:20:14,866 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 259 treesize of output 235 [2022-11-02 20:20:15,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:20:15,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469117859] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:20:15,297 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:20:15,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2022-11-02 20:20:15,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117021337] [2022-11-02 20:20:15,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:20:15,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 20:20:15,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:20:15,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 20:20:15,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=249, Unknown=8, NotChecked=32, Total=342 [2022-11-02 20:20:15,301 INFO L87 Difference]: Start difference. First operand 249 states and 678 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:20:15,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:20:15,798 INFO L93 Difference]: Finished difference Result 343 states and 952 transitions. [2022-11-02 20:20:15,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 20:20:15,799 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-02 20:20:15,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:20:15,801 INFO L225 Difference]: With dead ends: 343 [2022-11-02 20:20:15,801 INFO L226 Difference]: Without dead ends: 343 [2022-11-02 20:20:15,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=86, Invalid=416, Unknown=8, NotChecked=42, Total=552 [2022-11-02 20:20:15,802 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 27 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:20:15,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 22 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 113 Invalid, 0 Unknown, 157 Unchecked, 0.1s Time] [2022-11-02 20:20:15,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-11-02 20:20:15,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 286. [2022-11-02 20:20:15,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 284 states have (on average 2.823943661971831) internal successors, (802), 285 states have internal predecessors, (802), 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) [2022-11-02 20:20:15,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 802 transitions. [2022-11-02 20:20:15,818 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 802 transitions. Word has length 12 [2022-11-02 20:20:15,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:20:15,818 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 802 transitions. [2022-11-02 20:20:15,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:20:15,819 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 802 transitions. [2022-11-02 20:20:15,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-02 20:20:15,820 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:20:15,820 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:20:15,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:20:16,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-02 20:20:16,046 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-02 20:20:16,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:20:16,047 INFO L85 PathProgramCache]: Analyzing trace with hash 643874051, now seen corresponding path program 2 times [2022-11-02 20:20:16,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:20:16,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93327648] [2022-11-02 20:20:16,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:20:16,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:20:16,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:20:16,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:20:16,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:20:16,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93327648] [2022-11-02 20:20:16,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93327648] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:20:16,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888729607] [2022-11-02 20:20:16,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:20:16,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:20:16,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:20:16,541 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:20:16,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:20:16,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-02 20:20:16,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:20:16,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 20:20:16,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:20:16,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:20:16,866 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-02 20:20:16,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:20:16,896 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:20:16,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888729607] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:20:16,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:20:16,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 9 [2022-11-02 20:20:16,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150107177] [2022-11-02 20:20:16,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:20:16,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:20:16,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:20:16,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:20:16,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:20:16,899 INFO L87 Difference]: Start difference. First operand 286 states and 802 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2022-11-02 20:20:17,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:20:17,010 INFO L93 Difference]: Finished difference Result 333 states and 955 transitions. [2022-11-02 20:20:17,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:20:17,011 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-02 20:20:17,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:20:17,013 INFO L225 Difference]: With dead ends: 333 [2022-11-02 20:20:17,014 INFO L226 Difference]: Without dead ends: 333 [2022-11-02 20:20:17,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:20:17,015 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 35 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:20:17,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 6 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:20:17,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-11-02 20:20:17,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 312. [2022-11-02 20:20:17,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 310 states have (on average 2.832258064516129) internal successors, (878), 311 states have internal predecessors, (878), 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) [2022-11-02 20:20:17,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 878 transitions. [2022-11-02 20:20:17,029 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 878 transitions. Word has length 12 [2022-11-02 20:20:17,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:20:17,030 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 878 transitions. [2022-11-02 20:20:17,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2022-11-02 20:20:17,030 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 878 transitions. [2022-11-02 20:20:17,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-02 20:20:17,031 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:20:17,031 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:20:17,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:20:17,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:20:17,246 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-02 20:20:17,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:20:17,247 INFO L85 PathProgramCache]: Analyzing trace with hash 643874052, now seen corresponding path program 1 times [2022-11-02 20:20:17,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:20:17,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220901811] [2022-11-02 20:20:17,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:20:17,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:20:17,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:20:17,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:20:17,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:20:17,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220901811] [2022-11-02 20:20:17,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220901811] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:20:17,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827407310] [2022-11-02 20:20:17,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:20:17,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:20:17,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:20:17,933 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:20:17,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 20:20:18,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:20:18,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-02 20:20:18,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:20:18,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:20:18,298 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-02 20:20:18,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:20:18,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:20:18,370 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_552 (Array Int Int))) (< 0 (+ 2147483649 c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_552) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))))) is different from false [2022-11-02 20:20:18,388 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:20:18,388 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 44 [2022-11-02 20:20:18,392 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2022-11-02 20:20:18,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:20:18,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827407310] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:20:18,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:20:18,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2022-11-02 20:20:18,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504744593] [2022-11-02 20:20:18,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:20:18,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:20:18,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:20:18,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:20:18,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=226, Unknown=1, NotChecked=30, Total=306 [2022-11-02 20:20:18,593 INFO L87 Difference]: Start difference. First operand 312 states and 878 transitions. Second operand has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:20:19,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:20:19,802 INFO L93 Difference]: Finished difference Result 1036 states and 2989 transitions. [2022-11-02 20:20:19,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 20:20:19,803 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-02 20:20:19,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:20:19,818 INFO L225 Difference]: With dead ends: 1036 [2022-11-02 20:20:19,819 INFO L226 Difference]: Without dead ends: 1036 [2022-11-02 20:20:19,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=133, Invalid=520, Unknown=1, NotChecked=48, Total=702 [2022-11-02 20:20:19,820 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 186 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:20:19,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 36 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 446 Invalid, 0 Unknown, 154 Unchecked, 0.5s Time] [2022-11-02 20:20:19,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2022-11-02 20:20:19,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 467. [2022-11-02 20:20:19,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 465 states have (on average 2.9827956989247313) internal successors, (1387), 466 states have internal predecessors, (1387), 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) [2022-11-02 20:20:19,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1387 transitions. [2022-11-02 20:20:19,844 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1387 transitions. Word has length 12 [2022-11-02 20:20:19,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:20:19,845 INFO L495 AbstractCegarLoop]: Abstraction has 467 states and 1387 transitions. [2022-11-02 20:20:19,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:20:19,846 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1387 transitions. [2022-11-02 20:20:19,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-02 20:20:19,847 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:20:19,847 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:20:19,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-02 20:20:20,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-02 20:20:20,063 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-02 20:20:20,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:20:20,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1209357310, now seen corresponding path program 2 times [2022-11-02 20:20:20,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:20:20,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307758842] [2022-11-02 20:20:20,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:20:20,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:20:20,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:20:21,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:20:21,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:20:21,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307758842] [2022-11-02 20:20:21,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307758842] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:20:21,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387496011] [2022-11-02 20:20:21,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:20:21,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:20:21,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:20:21,035 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:20:21,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-02 20:20:21,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-02 20:20:21,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:20:21,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 20:20:21,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:20:21,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:20:21,381 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-02 20:20:21,408 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:20:21,408 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:20:21,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387496011] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:20:21,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:20:21,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 11 [2022-11-02 20:20:21,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676680453] [2022-11-02 20:20:21,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:20:21,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:20:21,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:20:21,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:20:21,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:20:21,410 INFO L87 Difference]: Start difference. First operand 467 states and 1387 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2022-11-02 20:20:21,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:20:21,512 INFO L93 Difference]: Finished difference Result 540 states and 1591 transitions. [2022-11-02 20:20:21,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:20:21,513 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-02 20:20:21,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:20:21,516 INFO L225 Difference]: With dead ends: 540 [2022-11-02 20:20:21,516 INFO L226 Difference]: Without dead ends: 540 [2022-11-02 20:20:21,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:20:21,517 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 35 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:20:21,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 6 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:20:21,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2022-11-02 20:20:21,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 409. [2022-11-02 20:20:21,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 407 states have (on average 2.960687960687961) internal successors, (1205), 408 states have internal predecessors, (1205), 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) [2022-11-02 20:20:21,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1205 transitions. [2022-11-02 20:20:21,532 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1205 transitions. Word has length 13 [2022-11-02 20:20:21,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:20:21,533 INFO L495 AbstractCegarLoop]: Abstraction has 409 states and 1205 transitions. [2022-11-02 20:20:21,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2022-11-02 20:20:21,533 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1205 transitions. [2022-11-02 20:20:21,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-02 20:20:21,534 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:20:21,534 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:20:21,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-02 20:20:21,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-02 20:20:21,758 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-02 20:20:21,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:20:21,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1913858413, now seen corresponding path program 3 times [2022-11-02 20:20:21,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:20:21,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801919168] [2022-11-02 20:20:21,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:20:21,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:20:21,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:20:22,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:20:22,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:20:22,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801919168] [2022-11-02 20:20:22,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801919168] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:20:22,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754545993] [2022-11-02 20:20:22,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:20:22,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:20:22,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:20:22,868 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:20:22,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-02 20:20:23,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-02 20:20:23,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:20:23,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-02 20:20:23,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:20:23,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:20:23,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-02 20:20:23,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:20:23,237 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-02 20:20:23,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:20:23,267 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:20:23,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754545993] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:20:23,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:20:23,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2022-11-02 20:20:23,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887197332] [2022-11-02 20:20:23,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:20:23,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:20:23,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:20:23,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:20:23,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:20:23,269 INFO L87 Difference]: Start difference. First operand 409 states and 1205 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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) [2022-11-02 20:20:23,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:20:23,382 INFO L93 Difference]: Finished difference Result 428 states and 1279 transitions. [2022-11-02 20:20:23,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:20:23,382 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-02 20:20:23,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:20:23,385 INFO L225 Difference]: With dead ends: 428 [2022-11-02 20:20:23,385 INFO L226 Difference]: Without dead ends: 428 [2022-11-02 20:20:23,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:20:23,386 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 37 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:20:23,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 6 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:20:23,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-11-02 20:20:23,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 428. [2022-11-02 20:20:23,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 426 states have (on average 3.0023474178403755) internal successors, (1279), 427 states have internal predecessors, (1279), 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) [2022-11-02 20:20:23,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 1279 transitions. [2022-11-02 20:20:23,401 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 1279 transitions. Word has length 13 [2022-11-02 20:20:23,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:20:23,402 INFO L495 AbstractCegarLoop]: Abstraction has 428 states and 1279 transitions. [2022-11-02 20:20:23,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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) [2022-11-02 20:20:23,402 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 1279 transitions. [2022-11-02 20:20:23,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-02 20:20:23,403 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:20:23,403 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:20:23,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-02 20:20:23,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-02 20:20:23,622 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-02 20:20:23,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:20:23,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1913858414, now seen corresponding path program 3 times [2022-11-02 20:20:23,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:20:23,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104348696] [2022-11-02 20:20:23,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:20:23,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:20:23,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:20:24,583 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:20:24,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:20:24,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104348696] [2022-11-02 20:20:24,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104348696] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:20:24,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566887695] [2022-11-02 20:20:24,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:20:24,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:20:24,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:20:24,585 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:20:24,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-02 20:20:24,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-02 20:20:24,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:20:24,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-02 20:20:24,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:20:24,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:20:24,875 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-02 20:20:24,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:20:24,921 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-02 20:20:24,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:20:24,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:20:24,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566887695] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:20:24,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:20:24,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2022-11-02 20:20:24,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681032207] [2022-11-02 20:20:24,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:20:24,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:20:24,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:20:24,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:20:24,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:20:24,954 INFO L87 Difference]: Start difference. First operand 428 states and 1279 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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) [2022-11-02 20:20:25,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:20:25,094 INFO L93 Difference]: Finished difference Result 428 states and 1257 transitions. [2022-11-02 20:20:25,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:20:25,095 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-02 20:20:25,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:20:25,097 INFO L225 Difference]: With dead ends: 428 [2022-11-02 20:20:25,097 INFO L226 Difference]: Without dead ends: 428 [2022-11-02 20:20:25,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:20:25,098 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 28 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:20:25,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 8 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:20:25,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-11-02 20:20:25,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 360. [2022-11-02 20:20:25,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 358 states have (on average 3.0027932960893855) internal successors, (1075), 359 states have internal predecessors, (1075), 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) [2022-11-02 20:20:25,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1075 transitions. [2022-11-02 20:20:25,111 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1075 transitions. Word has length 13 [2022-11-02 20:20:25,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:20:25,112 INFO L495 AbstractCegarLoop]: Abstraction has 360 states and 1075 transitions. [2022-11-02 20:20:25,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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) [2022-11-02 20:20:25,112 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1075 transitions. [2022-11-02 20:20:25,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-02 20:20:25,113 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:20:25,113 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:20:25,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-02 20:20:25,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:20:25,334 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-02 20:20:25,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:20:25,335 INFO L85 PathProgramCache]: Analyzing trace with hash -238548771, now seen corresponding path program 1 times [2022-11-02 20:20:25,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:20:25,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695286956] [2022-11-02 20:20:25,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:20:25,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:20:25,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:20:25,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:20:25,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:20:25,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695286956] [2022-11-02 20:20:25,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695286956] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:20:25,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928328459] [2022-11-02 20:20:25,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:20:25,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:20:25,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:20:25,437 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:20:25,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-02 20:20:25,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:20:25,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:20:25,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:20:25,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:20:25,590 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:20:25,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928328459] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:20:25,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:20:25,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-11-02 20:20:25,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729848135] [2022-11-02 20:20:25,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:20:25,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:20:25,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:20:25,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:20:25,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:20:25,593 INFO L87 Difference]: Start difference. First operand 360 states and 1075 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2022-11-02 20:20:25,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:20:25,671 INFO L93 Difference]: Finished difference Result 673 states and 1899 transitions. [2022-11-02 20:20:25,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:20:25,672 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 14 [2022-11-02 20:20:25,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:20:25,675 INFO L225 Difference]: With dead ends: 673 [2022-11-02 20:20:25,675 INFO L226 Difference]: Without dead ends: 621 [2022-11-02 20:20:25,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:20:25,676 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 34 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:20:25,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 4 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:20:25,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2022-11-02 20:20:25,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 533. [2022-11-02 20:20:25,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 531 states have (on average 2.9096045197740112) internal successors, (1545), 532 states have internal predecessors, (1545), 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) [2022-11-02 20:20:25,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 1545 transitions. [2022-11-02 20:20:25,696 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 1545 transitions. Word has length 14 [2022-11-02 20:20:25,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:20:25,696 INFO L495 AbstractCegarLoop]: Abstraction has 533 states and 1545 transitions. [2022-11-02 20:20:25,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2022-11-02 20:20:25,697 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 1545 transitions. [2022-11-02 20:20:25,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-02 20:20:25,698 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:20:25,698 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:20:25,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-02 20:20:25,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:20:25,915 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-02 20:20:25,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:20:25,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1547976560, now seen corresponding path program 2 times [2022-11-02 20:20:25,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:20:25,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310921068] [2022-11-02 20:20:25,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:20:25,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:20:25,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:20:26,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:20:26,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:20:26,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310921068] [2022-11-02 20:20:26,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310921068] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:20:26,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444819250] [2022-11-02 20:20:26,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:20:26,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:20:26,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:20:26,035 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:20:26,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-02 20:20:26,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:20:26,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:20:26,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:20:26,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:20:26,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:20:26,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:20:26,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:20:26,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444819250] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:20:26,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:20:26,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-02 20:20:26,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299858153] [2022-11-02 20:20:26,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:20:26,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:20:26,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:20:26,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:20:26,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:20:26,376 INFO L87 Difference]: Start difference. First operand 533 states and 1545 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 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) [2022-11-02 20:20:26,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:20:26,547 INFO L93 Difference]: Finished difference Result 444 states and 1218 transitions. [2022-11-02 20:20:26,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:20:26,547 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 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 16 [2022-11-02 20:20:26,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:20:26,549 INFO L225 Difference]: With dead ends: 444 [2022-11-02 20:20:26,549 INFO L226 Difference]: Without dead ends: 337 [2022-11-02 20:20:26,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:20:26,551 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 36 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:20:26,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 20 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:20:26,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-11-02 20:20:26,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 337. [2022-11-02 20:20:26,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 335 states have (on average 2.8955223880597014) internal successors, (970), 336 states have internal predecessors, (970), 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) [2022-11-02 20:20:26,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 970 transitions. [2022-11-02 20:20:26,562 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 970 transitions. Word has length 16 [2022-11-02 20:20:26,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:20:26,563 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 970 transitions. [2022-11-02 20:20:26,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 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) [2022-11-02 20:20:26,564 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 970 transitions. [2022-11-02 20:20:26,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-02 20:20:26,566 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:20:26,567 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:20:26,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-02 20:20:26,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-02 20:20:26,771 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-02 20:20:26,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:20:26,772 INFO L85 PathProgramCache]: Analyzing trace with hash -696402402, now seen corresponding path program 3 times [2022-11-02 20:20:26,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:20:26,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139465357] [2022-11-02 20:20:26,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:20:26,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:20:26,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:20:27,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:20:27,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:20:27,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139465357] [2022-11-02 20:20:27,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139465357] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:20:27,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954591195] [2022-11-02 20:20:27,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:20:27,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:20:27,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:20:27,550 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:20:27,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-02 20:20:27,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-02 20:20:27,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:20:27,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-02 20:20:27,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:20:28,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:20:28,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:20:28,606 INFO L356 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-11-02 20:20:28,606 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 48 treesize of output 67 [2022-11-02 20:20:29,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:20:29,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954591195] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:20:29,306 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:20:29,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2022-11-02 20:20:29,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664177762] [2022-11-02 20:20:29,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:20:29,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-02 20:20:29,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:20:29,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-02 20:20:29,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2022-11-02 20:20:29,308 INFO L87 Difference]: Start difference. First operand 337 states and 970 transitions. Second operand has 26 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 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) [2022-11-02 20:20:33,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:20:33,897 INFO L93 Difference]: Finished difference Result 2026 states and 6301 transitions. [2022-11-02 20:20:33,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-02 20:20:33,897 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-02 20:20:33,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:20:33,908 INFO L225 Difference]: With dead ends: 2026 [2022-11-02 20:20:33,908 INFO L226 Difference]: Without dead ends: 2026 [2022-11-02 20:20:33,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=590, Invalid=2832, Unknown=0, NotChecked=0, Total=3422 [2022-11-02 20:20:33,910 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 490 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 1327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 323 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:20:33,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [490 Valid, 86 Invalid, 1327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 893 Invalid, 0 Unknown, 323 Unchecked, 1.1s Time] [2022-11-02 20:20:33,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2026 states. [2022-11-02 20:20:33,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2026 to 1268. [2022-11-02 20:20:33,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1268 states, 1266 states have (on average 3.3033175355450237) internal successors, (4182), 1267 states have internal predecessors, (4182), 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) [2022-11-02 20:20:33,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1268 states to 1268 states and 4182 transitions. [2022-11-02 20:20:33,965 INFO L78 Accepts]: Start accepts. Automaton has 1268 states and 4182 transitions. Word has length 17 [2022-11-02 20:20:33,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:20:33,966 INFO L495 AbstractCegarLoop]: Abstraction has 1268 states and 4182 transitions. [2022-11-02 20:20:33,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 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) [2022-11-02 20:20:33,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1268 states and 4182 transitions. [2022-11-02 20:20:33,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-02 20:20:33,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:20:33,968 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:20:34,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-02 20:20:34,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:20:34,182 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-02 20:20:34,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:20:34,183 INFO L85 PathProgramCache]: Analyzing trace with hash -696402401, now seen corresponding path program 1 times [2022-11-02 20:20:34,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:20:34,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280348191] [2022-11-02 20:20:34,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:20:34,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:20:34,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:20:34,847 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:20:34,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:20:34,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280348191] [2022-11-02 20:20:34,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280348191] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:20:34,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056691647] [2022-11-02 20:20:34,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:20:34,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:20:34,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:20:34,849 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:20:34,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-02 20:20:34,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:20:34,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-02 20:20:34,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:20:35,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:20:35,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:20:35,373 INFO L356 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-02 20:20:35,374 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 17 [2022-11-02 20:20:35,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:20:35,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056691647] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:20:35,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:20:35,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2022-11-02 20:20:35,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656853218] [2022-11-02 20:20:35,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:20:35,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-02 20:20:35,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:20:35,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-02 20:20:35,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-11-02 20:20:35,778 INFO L87 Difference]: Start difference. First operand 1268 states and 4182 transitions. Second operand has 26 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 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) [2022-11-02 20:20:37,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:20:37,968 INFO L93 Difference]: Finished difference Result 2376 states and 7449 transitions. [2022-11-02 20:20:37,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-02 20:20:37,968 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-02 20:20:37,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:20:37,981 INFO L225 Difference]: With dead ends: 2376 [2022-11-02 20:20:37,981 INFO L226 Difference]: Without dead ends: 2367 [2022-11-02 20:20:37,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=479, Invalid=1873, Unknown=0, NotChecked=0, Total=2352 [2022-11-02 20:20:37,983 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 370 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 478 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:20:37,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 110 Invalid, 1556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1019 Invalid, 0 Unknown, 478 Unchecked, 0.8s Time] [2022-11-02 20:20:37,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2367 states. [2022-11-02 20:20:38,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2367 to 1367. [2022-11-02 20:20:38,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1367 states, 1365 states have (on average 3.164102564102564) internal successors, (4319), 1366 states have internal predecessors, (4319), 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) [2022-11-02 20:20:38,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 4319 transitions. [2022-11-02 20:20:38,036 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 4319 transitions. Word has length 17 [2022-11-02 20:20:38,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:20:38,037 INFO L495 AbstractCegarLoop]: Abstraction has 1367 states and 4319 transitions. [2022-11-02 20:20:38,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 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) [2022-11-02 20:20:38,037 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 4319 transitions. [2022-11-02 20:20:38,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-02 20:20:38,039 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:20:38,039 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:20:38,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-02 20:20:38,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-02 20:20:38,254 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-02 20:20:38,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:20:38,255 INFO L85 PathProgramCache]: Analyzing trace with hash -701389992, now seen corresponding path program 4 times [2022-11-02 20:20:38,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:20:38,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664060548] [2022-11-02 20:20:38,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:20:38,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:20:38,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:20:38,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:20:38,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:20:38,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664060548] [2022-11-02 20:20:38,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664060548] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:20:38,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707052156] [2022-11-02 20:20:38,926 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:20:38,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:20:38,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:20:38,930 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:20:38,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-02 20:20:39,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:20:39,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:20:39,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-02 20:20:39,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:20:39,170 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-02 20:20:39,222 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:20:39,268 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:20:39,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:20:39,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:20:40,241 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:20:40,241 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 84 [2022-11-02 20:20:40,295 INFO L356 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-11-02 20:20:40,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 538 treesize of output 524 [2022-11-02 20:20:40,359 INFO L356 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-11-02 20:20:40,360 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 472 treesize of output 424 [2022-11-02 20:20:40,418 INFO L356 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-11-02 20:20:40,419 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 372 treesize of output 374 [2022-11-02 20:20:42,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:20:42,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707052156] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:20:42,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:20:42,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 26 [2022-11-02 20:20:42,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916180276] [2022-11-02 20:20:42,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:20:42,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-02 20:20:42,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:20:42,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-02 20:20:42,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=634, Unknown=3, NotChecked=0, Total=756 [2022-11-02 20:20:42,165 INFO L87 Difference]: Start difference. First operand 1367 states and 4319 transitions. Second operand has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 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) [2022-11-02 20:20:43,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:20:43,943 INFO L93 Difference]: Finished difference Result 2838 states and 8550 transitions. [2022-11-02 20:20:43,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-02 20:20:43,944 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-02 20:20:43,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:20:43,956 INFO L225 Difference]: With dead ends: 2838 [2022-11-02 20:20:43,957 INFO L226 Difference]: Without dead ends: 2802 [2022-11-02 20:20:43,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=306, Invalid=1671, Unknown=3, NotChecked=0, Total=1980 [2022-11-02 20:20:43,958 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 277 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 249 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:20:43,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 69 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 652 Invalid, 0 Unknown, 249 Unchecked, 0.7s Time] [2022-11-02 20:20:43,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2802 states. [2022-11-02 20:20:44,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2802 to 1848. [2022-11-02 20:20:44,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1848 states, 1846 states have (on average 3.197724810400867) internal successors, (5903), 1847 states have internal predecessors, (5903), 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) [2022-11-02 20:20:44,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1848 states to 1848 states and 5903 transitions. [2022-11-02 20:20:44,024 INFO L78 Accepts]: Start accepts. Automaton has 1848 states and 5903 transitions. Word has length 17 [2022-11-02 20:20:44,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:20:44,024 INFO L495 AbstractCegarLoop]: Abstraction has 1848 states and 5903 transitions. [2022-11-02 20:20:44,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 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) [2022-11-02 20:20:44,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1848 states and 5903 transitions. [2022-11-02 20:20:44,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-02 20:20:44,027 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:20:44,027 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:20:44,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-02 20:20:44,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-02 20:20:44,246 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-02 20:20:44,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:20:44,247 INFO L85 PathProgramCache]: Analyzing trace with hash -701389991, now seen corresponding path program 2 times [2022-11-02 20:20:44,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:20:44,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942430745] [2022-11-02 20:20:44,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:20:44,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:20:44,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:20:45,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:20:45,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:20:45,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942430745] [2022-11-02 20:20:45,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942430745] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:20:45,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572382973] [2022-11-02 20:20:45,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:20:45,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:20:45,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:20:45,046 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:20:45,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-02 20:20:45,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:20:45,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:20:45,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-02 20:20:45,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:20:45,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:20:45,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:20:45,652 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:20:45,652 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2022-11-02 20:20:45,963 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:20:45,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572382973] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:20:45,963 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:20:45,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 25 [2022-11-02 20:20:45,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257736100] [2022-11-02 20:20:45,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:20:45,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-02 20:20:45,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:20:45,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-02 20:20:45,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2022-11-02 20:20:45,965 INFO L87 Difference]: Start difference. First operand 1848 states and 5903 transitions. Second operand has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 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) [2022-11-02 20:20:47,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:20:47,347 INFO L93 Difference]: Finished difference Result 2675 states and 8102 transitions. [2022-11-02 20:20:47,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-02 20:20:47,347 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-02 20:20:47,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:20:47,364 INFO L225 Difference]: With dead ends: 2675 [2022-11-02 20:20:47,364 INFO L226 Difference]: Without dead ends: 2657 [2022-11-02 20:20:47,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=273, Invalid=1059, Unknown=0, NotChecked=0, Total=1332 [2022-11-02 20:20:47,365 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 150 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 323 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:20:47,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 50 Invalid, 1245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 849 Invalid, 0 Unknown, 323 Unchecked, 0.7s Time] [2022-11-02 20:20:47,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2657 states. [2022-11-02 20:20:47,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2657 to 1910. [2022-11-02 20:20:47,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1910 states, 1908 states have (on average 3.2127882599580713) internal successors, (6130), 1909 states have internal predecessors, (6130), 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) [2022-11-02 20:20:47,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1910 states to 1910 states and 6130 transitions. [2022-11-02 20:20:47,451 INFO L78 Accepts]: Start accepts. Automaton has 1910 states and 6130 transitions. Word has length 17 [2022-11-02 20:20:47,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:20:47,451 INFO L495 AbstractCegarLoop]: Abstraction has 1910 states and 6130 transitions. [2022-11-02 20:20:47,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 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) [2022-11-02 20:20:47,452 INFO L276 IsEmpty]: Start isEmpty. Operand 1910 states and 6130 transitions. [2022-11-02 20:20:47,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-02 20:20:47,455 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:20:47,455 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:20:47,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-02 20:20:47,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-02 20:20:47,660 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-02 20:20:47,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:20:47,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1600728, now seen corresponding path program 5 times [2022-11-02 20:20:47,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:20:47,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206576035] [2022-11-02 20:20:47,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:20:47,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:20:47,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:20:48,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:20:48,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:20:48,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206576035] [2022-11-02 20:20:48,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206576035] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:20:48,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999566019] [2022-11-02 20:20:48,365 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:20:48,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:20:48,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:20:48,367 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:20:48,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-02 20:20:48,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:20:48,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:20:48,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-02 20:20:48,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:20:48,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:20:48,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:20:49,055 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:20:49,055 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 49 treesize of output 67 [2022-11-02 20:20:49,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:20:49,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999566019] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:20:49,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:20:49,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2022-11-02 20:20:49,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234652249] [2022-11-02 20:20:49,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:20:49,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-02 20:20:49,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:20:49,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-02 20:20:49,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2022-11-02 20:20:49,339 INFO L87 Difference]: Start difference. First operand 1910 states and 6130 transitions. Second operand has 26 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 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) [2022-11-02 20:20:50,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:20:50,887 INFO L93 Difference]: Finished difference Result 2759 states and 8518 transitions. [2022-11-02 20:20:50,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-02 20:20:50,887 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-02 20:20:50,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:20:50,896 INFO L225 Difference]: With dead ends: 2759 [2022-11-02 20:20:50,897 INFO L226 Difference]: Without dead ends: 2759 [2022-11-02 20:20:50,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=215, Invalid=1045, Unknown=0, NotChecked=0, Total=1260 [2022-11-02 20:20:50,898 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 207 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 1108 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 1149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-02 20:20:50,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 79 Invalid, 1149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1108 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-02 20:20:50,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2759 states. [2022-11-02 20:20:50,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2759 to 2093. [2022-11-02 20:20:50,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2093 states, 2091 states have (on average 3.2118603538976567) internal successors, (6716), 2092 states have internal predecessors, (6716), 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) [2022-11-02 20:20:50,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2093 states to 2093 states and 6716 transitions. [2022-11-02 20:20:50,968 INFO L78 Accepts]: Start accepts. Automaton has 2093 states and 6716 transitions. Word has length 17 [2022-11-02 20:20:50,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:20:50,968 INFO L495 AbstractCegarLoop]: Abstraction has 2093 states and 6716 transitions. [2022-11-02 20:20:50,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 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) [2022-11-02 20:20:50,969 INFO L276 IsEmpty]: Start isEmpty. Operand 2093 states and 6716 transitions. [2022-11-02 20:20:50,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-02 20:20:50,971 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:20:50,971 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:20:51,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-02 20:20:51,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-02 20:20:51,186 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-02 20:20:51,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:20:51,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1600729, now seen corresponding path program 3 times [2022-11-02 20:20:51,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:20:51,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769418954] [2022-11-02 20:20:51,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:20:51,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:20:51,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:20:51,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:20:51,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:20:51,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769418954] [2022-11-02 20:20:51,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769418954] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:20:51,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038299661] [2022-11-02 20:20:51,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:20:51,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:20:51,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:20:51,602 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:20:51,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-02 20:20:51,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-02 20:20:51,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:20:51,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-02 20:20:51,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:20:52,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:20:52,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:20:52,139 INFO L356 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-11-02 20:20:52,139 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2022-11-02 20:20:52,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:20:52,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038299661] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:20:52,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:20:52,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2022-11-02 20:20:52,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213481374] [2022-11-02 20:20:52,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:20:52,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-02 20:20:52,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:20:52,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-02 20:20:52,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-11-02 20:20:52,507 INFO L87 Difference]: Start difference. First operand 2093 states and 6716 transitions. Second operand has 26 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 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) [2022-11-02 20:20:53,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:20:53,926 INFO L93 Difference]: Finished difference Result 2738 states and 9017 transitions. [2022-11-02 20:20:53,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-02 20:20:53,927 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-02 20:20:53,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:20:53,937 INFO L225 Difference]: With dead ends: 2738 [2022-11-02 20:20:53,938 INFO L226 Difference]: Without dead ends: 2738 [2022-11-02 20:20:53,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=316, Invalid=1576, Unknown=0, NotChecked=0, Total=1892 [2022-11-02 20:20:53,939 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 179 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 437 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:20:53,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 98 Invalid, 1205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 720 Invalid, 0 Unknown, 437 Unchecked, 0.6s Time] [2022-11-02 20:20:53,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2738 states. [2022-11-02 20:20:54,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2738 to 2506. [2022-11-02 20:20:54,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2506 states, 2504 states have (on average 3.290335463258786) internal successors, (8239), 2505 states have internal predecessors, (8239), 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) [2022-11-02 20:20:54,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2506 states to 2506 states and 8239 transitions. [2022-11-02 20:20:54,020 INFO L78 Accepts]: Start accepts. Automaton has 2506 states and 8239 transitions. Word has length 17 [2022-11-02 20:20:54,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:20:54,020 INFO L495 AbstractCegarLoop]: Abstraction has 2506 states and 8239 transitions. [2022-11-02 20:20:54,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 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) [2022-11-02 20:20:54,020 INFO L276 IsEmpty]: Start isEmpty. Operand 2506 states and 8239 transitions. [2022-11-02 20:20:54,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-02 20:20:54,023 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:20:54,023 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:20:54,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-02 20:20:54,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-02 20:20:54,250 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-02 20:20:54,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:20:54,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1505627386, now seen corresponding path program 6 times [2022-11-02 20:20:54,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:20:54,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162163199] [2022-11-02 20:20:54,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:20:54,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:20:54,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:20:55,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:20:55,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:20:55,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162163199] [2022-11-02 20:20:55,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162163199] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:20:55,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837158060] [2022-11-02 20:20:55,119 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:20:55,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:20:55,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:20:55,120 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:20:55,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-02 20:20:55,294 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-02 20:20:55,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:20:55,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-02 20:20:55,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:20:55,396 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-02 20:20:55,435 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:20:55,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:20:55,541 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-02 20:20:55,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:20:55,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:20:56,683 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:20:56,684 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 80 [2022-11-02 20:20:56,732 INFO L356 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-11-02 20:20:56,733 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 408 treesize of output 388 [2022-11-02 20:20:56,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:20:56,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:20:56,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:20:56,792 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:20:56,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 258 treesize of output 252 [2022-11-02 20:20:56,827 INFO L356 Elim1Store]: treesize reduction 25, result has 32.4 percent of original size [2022-11-02 20:20:56,828 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 292 treesize of output 232 [2022-11-02 20:20:58,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:20:58,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837158060] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:20:58,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:20:58,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2022-11-02 20:20:58,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205120904] [2022-11-02 20:20:58,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:20:58,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-02 20:20:58,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:20:58,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-02 20:20:58,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=647, Unknown=4, NotChecked=0, Total=812 [2022-11-02 20:20:58,085 INFO L87 Difference]: Start difference. First operand 2506 states and 8239 transitions. Second operand has 29 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 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) [2022-11-02 20:20:59,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:20:59,594 INFO L93 Difference]: Finished difference Result 2947 states and 9528 transitions. [2022-11-02 20:20:59,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-02 20:20:59,595 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-02 20:20:59,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:20:59,604 INFO L225 Difference]: With dead ends: 2947 [2022-11-02 20:20:59,604 INFO L226 Difference]: Without dead ends: 2947 [2022-11-02 20:20:59,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=390, Invalid=1411, Unknown=5, NotChecked=0, Total=1806 [2022-11-02 20:20:59,605 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 287 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 1128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 587 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:20:59,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 52 Invalid, 1128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 483 Invalid, 0 Unknown, 587 Unchecked, 0.4s Time] [2022-11-02 20:20:59,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2947 states. [2022-11-02 20:20:59,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2947 to 2619. [2022-11-02 20:20:59,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2619 states, 2617 states have (on average 3.311425296140619) internal successors, (8666), 2618 states have internal predecessors, (8666), 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) [2022-11-02 20:20:59,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2619 states to 2619 states and 8666 transitions. [2022-11-02 20:20:59,683 INFO L78 Accepts]: Start accepts. Automaton has 2619 states and 8666 transitions. Word has length 17 [2022-11-02 20:20:59,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:20:59,683 INFO L495 AbstractCegarLoop]: Abstraction has 2619 states and 8666 transitions. [2022-11-02 20:20:59,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 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) [2022-11-02 20:20:59,684 INFO L276 IsEmpty]: Start isEmpty. Operand 2619 states and 8666 transitions. [2022-11-02 20:20:59,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-02 20:20:59,686 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:20:59,687 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:20:59,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-02 20:20:59,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:20:59,902 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-02 20:20:59,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:20:59,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1500639796, now seen corresponding path program 7 times [2022-11-02 20:20:59,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:20:59,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574317637] [2022-11-02 20:20:59,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:20:59,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:20:59,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:21:00,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:21:00,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:21:00,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574317637] [2022-11-02 20:21:00,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574317637] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:21:00,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176275541] [2022-11-02 20:21:00,753 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 20:21:00,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:21:00,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:21:00,754 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:21:00,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-02 20:21:00,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:21:00,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-02 20:21:00,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:21:00,964 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-02 20:21:01,008 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-02 20:21:01,067 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:21:01,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:21:01,189 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-02 20:21:01,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:21:01,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:21:02,108 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:21:02,109 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 150 treesize of output 95 [2022-11-02 20:21:02,141 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:21:02,142 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 218 treesize of output 236 [2022-11-02 20:21:02,166 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:21:02,167 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 160 treesize of output 146 [2022-11-02 20:21:02,201 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:21:02,201 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 117 treesize of output 143 [2022-11-02 20:21:03,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:21:03,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176275541] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:21:03,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:21:03,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2022-11-02 20:21:03,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647285066] [2022-11-02 20:21:03,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:21:03,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-02 20:21:03,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:21:03,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-02 20:21:03,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=666, Unknown=5, NotChecked=0, Total=812 [2022-11-02 20:21:03,358 INFO L87 Difference]: Start difference. First operand 2619 states and 8666 transitions. Second operand has 29 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 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) [2022-11-02 20:21:05,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:21:05,683 INFO L93 Difference]: Finished difference Result 4710 states and 14854 transitions. [2022-11-02 20:21:05,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-02 20:21:05,683 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-02 20:21:05,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:21:05,696 INFO L225 Difference]: With dead ends: 4710 [2022-11-02 20:21:05,696 INFO L226 Difference]: Without dead ends: 4656 [2022-11-02 20:21:05,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=454, Invalid=2191, Unknown=7, NotChecked=0, Total=2652 [2022-11-02 20:21:05,698 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 435 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 666 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:21:05,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 87 Invalid, 1556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 792 Invalid, 0 Unknown, 666 Unchecked, 0.8s Time] [2022-11-02 20:21:05,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4656 states. [2022-11-02 20:21:05,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4656 to 3050. [2022-11-02 20:21:05,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3050 states, 3048 states have (on average 3.3198818897637796) internal successors, (10119), 3049 states have internal predecessors, (10119), 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) [2022-11-02 20:21:05,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3050 states to 3050 states and 10119 transitions. [2022-11-02 20:21:05,799 INFO L78 Accepts]: Start accepts. Automaton has 3050 states and 10119 transitions. Word has length 17 [2022-11-02 20:21:05,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:21:05,799 INFO L495 AbstractCegarLoop]: Abstraction has 3050 states and 10119 transitions. [2022-11-02 20:21:05,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 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) [2022-11-02 20:21:05,799 INFO L276 IsEmpty]: Start isEmpty. Operand 3050 states and 10119 transitions. [2022-11-02 20:21:05,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-02 20:21:05,802 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:21:05,802 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:21:05,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-02 20:21:06,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-02 20:21:06,018 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-02 20:21:06,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:21:06,019 INFO L85 PathProgramCache]: Analyzing trace with hash -2091336780, now seen corresponding path program 8 times [2022-11-02 20:21:06,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:21:06,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685977723] [2022-11-02 20:21:06,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:21:06,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:21:06,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:21:06,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:21:06,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:21:06,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685977723] [2022-11-02 20:21:06,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685977723] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:21:06,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427375219] [2022-11-02 20:21:06,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:21:06,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:21:06,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:21:06,979 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:21:06,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-02 20:21:07,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:21:07,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:21:07,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-02 20:21:07,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:21:07,248 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-02 20:21:07,295 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:21:07,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:21:07,421 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-02 20:21:07,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:21:07,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:21:08,363 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:21:08,364 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 81 [2022-11-02 20:21:08,415 INFO L356 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-11-02 20:21:08,416 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 416 treesize of output 410 [2022-11-02 20:21:08,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:21:08,456 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:21:08,457 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 264 treesize of output 272 [2022-11-02 20:21:08,495 INFO L356 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2022-11-02 20:21:08,496 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 296 treesize of output 248 [2022-11-02 20:21:10,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:21:10,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427375219] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:21:10,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:21:10,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2022-11-02 20:21:10,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641846776] [2022-11-02 20:21:10,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:21:10,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-02 20:21:10,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:21:10,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-02 20:21:10,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=703, Unknown=2, NotChecked=0, Total=812 [2022-11-02 20:21:10,410 INFO L87 Difference]: Start difference. First operand 3050 states and 10119 transitions. Second operand has 29 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 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) [2022-11-02 20:21:11,385 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse3 (* c_~front~0 4))) (let ((.cse1 (select |c_#memory_int| c_~queue~0.base)) (.cse5 (+ c_~queue~0.offset .cse3))) (let ((.cse2 (select .cse1 .cse5)) (.cse0 (+ c_~front~0 1))) (and (forall ((v_~front~0_132 Int)) (or (not (<= .cse0 v_~front~0_132)) (< (+ (select .cse1 (+ c_~queue~0.offset (* v_~front~0_132 4))) c_~d~0 .cse2) 2147483648) (<= c_~n~0 v_~front~0_132) (< v_~front~0_132 0))) (= c_~d~0 0) (<= c_~front~0 0) (= c_~queue~0.offset 0) (<= (select .cse1 (+ .cse3 4)) 1) (= .cse2 1) (forall ((v_~front~0_132 Int) (v_ArrVal_1195 (Array Int Int))) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1195) c_~queue~0.base))) (or (not (= (select .cse4 (+ c_~queue~0.offset (* c_~back~0 4))) 1)) (not (<= .cse0 v_~front~0_132)) (<= c_~n~0 v_~front~0_132) (< v_~front~0_132 0) (< (+ c_~d~0 (select .cse4 .cse5) (select .cse4 (+ c_~queue~0.offset (* v_~front~0_132 4)))) 2147483648)))) (< 0 .cse0))))) is different from false [2022-11-02 20:21:12,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:21:12,194 INFO L93 Difference]: Finished difference Result 3256 states and 10786 transitions. [2022-11-02 20:21:12,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-02 20:21:12,196 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-02 20:21:12,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:21:12,203 INFO L225 Difference]: With dead ends: 3256 [2022-11-02 20:21:12,203 INFO L226 Difference]: Without dead ends: 3256 [2022-11-02 20:21:12,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=281, Invalid=1784, Unknown=9, NotChecked=88, Total=2162 [2022-11-02 20:21:12,204 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 88 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:21:12,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 62 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 341 Invalid, 0 Unknown, 184 Unchecked, 0.4s Time] [2022-11-02 20:21:12,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3256 states. [2022-11-02 20:21:12,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3256 to 3163. [2022-11-02 20:21:12,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3163 states, 3161 states have (on average 3.3375514077823474) internal successors, (10550), 3162 states have internal predecessors, (10550), 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) [2022-11-02 20:21:12,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3163 states to 3163 states and 10550 transitions. [2022-11-02 20:21:12,285 INFO L78 Accepts]: Start accepts. Automaton has 3163 states and 10550 transitions. Word has length 17 [2022-11-02 20:21:12,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:21:12,286 INFO L495 AbstractCegarLoop]: Abstraction has 3163 states and 10550 transitions. [2022-11-02 20:21:12,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 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) [2022-11-02 20:21:12,286 INFO L276 IsEmpty]: Start isEmpty. Operand 3163 states and 10550 transitions. [2022-11-02 20:21:12,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-02 20:21:12,289 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:21:12,289 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:21:12,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-02 20:21:12,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:21:12,510 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-02 20:21:12,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:21:12,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1401356538, now seen corresponding path program 9 times [2022-11-02 20:21:12,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:21:12,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074552279] [2022-11-02 20:21:12,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:21:12,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:21:12,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:21:13,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:21:13,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:21:13,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074552279] [2022-11-02 20:21:13,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074552279] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:21:13,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699627713] [2022-11-02 20:21:13,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:21:13,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:21:13,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:21:13,348 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:21:13,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-02 20:21:13,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-02 20:21:13,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:21:13,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-02 20:21:13,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:21:13,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-02 20:21:13,681 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:21:13,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:21:13,790 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-02 20:21:14,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:21:14,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:21:14,820 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:21:14,820 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 81 [2022-11-02 20:21:14,867 INFO L356 Elim1Store]: treesize reduction 26, result has 60.0 percent of original size [2022-11-02 20:21:14,867 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 416 treesize of output 396 [2022-11-02 20:21:14,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:21:14,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:21:14,902 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:21:14,903 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 264 treesize of output 258 [2022-11-02 20:21:14,934 INFO L356 Elim1Store]: treesize reduction 27, result has 34.1 percent of original size [2022-11-02 20:21:14,935 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 296 treesize of output 234 [2022-11-02 20:21:15,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:21:15,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699627713] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:21:15,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:21:15,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2022-11-02 20:21:15,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778761554] [2022-11-02 20:21:15,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:21:15,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-02 20:21:15,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:21:15,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-02 20:21:15,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=632, Unknown=1, NotChecked=0, Total=812 [2022-11-02 20:21:15,812 INFO L87 Difference]: Start difference. First operand 3163 states and 10550 transitions. Second operand has 29 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 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) [2022-11-02 20:21:18,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:21:18,235 INFO L93 Difference]: Finished difference Result 3580 states and 11729 transitions. [2022-11-02 20:21:18,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-02 20:21:18,236 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-02 20:21:18,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:21:18,244 INFO L225 Difference]: With dead ends: 3580 [2022-11-02 20:21:18,244 INFO L226 Difference]: Without dead ends: 3580 [2022-11-02 20:21:18,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=512, Invalid=1934, Unknown=4, NotChecked=0, Total=2450 [2022-11-02 20:21:18,245 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 386 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 1315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 727 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:21:18,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 67 Invalid, 1315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 546 Invalid, 0 Unknown, 727 Unchecked, 0.5s Time] [2022-11-02 20:21:18,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3580 states. [2022-11-02 20:21:18,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3580 to 3304. [2022-11-02 20:21:18,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3304 states, 3302 states have (on average 3.2995154451847366) internal successors, (10895), 3303 states have internal predecessors, (10895), 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) [2022-11-02 20:21:18,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3304 states to 3304 states and 10895 transitions. [2022-11-02 20:21:18,337 INFO L78 Accepts]: Start accepts. Automaton has 3304 states and 10895 transitions. Word has length 17 [2022-11-02 20:21:18,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:21:18,337 INFO L495 AbstractCegarLoop]: Abstraction has 3304 states and 10895 transitions. [2022-11-02 20:21:18,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 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) [2022-11-02 20:21:18,338 INFO L276 IsEmpty]: Start isEmpty. Operand 3304 states and 10895 transitions. [2022-11-02 20:21:18,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-02 20:21:18,341 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:21:18,341 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:21:18,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-02 20:21:18,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-02 20:21:18,562 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-02 20:21:18,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:21:18,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1349977157, now seen corresponding path program 4 times [2022-11-02 20:21:18,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:21:18,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931136704] [2022-11-02 20:21:18,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:21:18,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:21:18,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:21:19,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:21:19,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:21:19,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931136704] [2022-11-02 20:21:19,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931136704] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:21:19,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576208539] [2022-11-02 20:21:19,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:21:19,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:21:19,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:21:19,055 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:21:19,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-02 20:21:19,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:21:19,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:21:19,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-02 20:21:19,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:21:19,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:21:19,477 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-02 20:21:19,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:21:19,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:21:19,725 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1288 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1288) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 4)) 1))) is different from false [2022-11-02 20:21:19,741 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:21:19,741 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 45 [2022-11-02 20:21:19,753 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-11-02 20:21:20,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:21:20,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576208539] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:21:20,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:21:20,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2022-11-02 20:21:20,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727995706] [2022-11-02 20:21:20,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:21:20,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-02 20:21:20,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:21:20,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-02 20:21:20,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=660, Unknown=1, NotChecked=52, Total=812 [2022-11-02 20:21:20,171 INFO L87 Difference]: Start difference. First operand 3304 states and 10895 transitions. Second operand has 29 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 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) [2022-11-02 20:21:21,772 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (< c_~n~0 (+ c_~back~0 2)))) (let ((.cse5 (* c_~front~0 4)) (.cse0 (not (= c_~queue~0.base |c_ULTIMATE.start_main_~#t2~0#1.base|))) (.cse2 (or (< c_~front~0 (+ c_~back~0 1)) .cse1)) (.cse3 (or (< c_~n~0 (+ 3 c_~front~0)) .cse1)) (.cse4 (not (<= 0 c_~back~0)))) (and (or (and (or .cse0 .cse1) .cse2 .cse3) .cse4) (forall ((v_ArrVal_1288 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1288) c_~queue~0.base) (+ c_~queue~0.offset .cse5 4)) 1))) (or (and (= (+ .cse5 4) (* c_~back~0 4)) .cse0) (not (< c_~back~0 c_~n~0)) .cse4) (or (and (or (< |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| |c_ULTIMATE.start_main_~#t2~0#1.base|) .cse1) .cse2 .cse3) .cse4 (< (+ 2 |c_ULTIMATE.start_create_fresh_int_array_~i~0#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|))))) is different from false [2022-11-02 20:21:21,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:21:21,845 INFO L93 Difference]: Finished difference Result 4361 states and 14846 transitions. [2022-11-02 20:21:21,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-02 20:21:21,845 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-02 20:21:21,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:21:21,854 INFO L225 Difference]: With dead ends: 4361 [2022-11-02 20:21:21,854 INFO L226 Difference]: Without dead ends: 4361 [2022-11-02 20:21:21,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=309, Invalid=1589, Unknown=2, NotChecked=170, Total=2070 [2022-11-02 20:21:21,855 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 176 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 1289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 664 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:21:21,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 71 Invalid, 1289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 584 Invalid, 0 Unknown, 664 Unchecked, 0.5s Time] [2022-11-02 20:21:21,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4361 states. [2022-11-02 20:21:21,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4361 to 3301. [2022-11-02 20:21:21,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3301 states, 3299 states have (on average 3.2994846923310095) internal successors, (10885), 3300 states have internal predecessors, (10885), 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) [2022-11-02 20:21:21,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3301 states to 3301 states and 10885 transitions. [2022-11-02 20:21:21,935 INFO L78 Accepts]: Start accepts. Automaton has 3301 states and 10885 transitions. Word has length 17 [2022-11-02 20:21:21,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:21:21,935 INFO L495 AbstractCegarLoop]: Abstraction has 3301 states and 10885 transitions. [2022-11-02 20:21:21,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 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) [2022-11-02 20:21:21,936 INFO L276 IsEmpty]: Start isEmpty. Operand 3301 states and 10885 transitions. [2022-11-02 20:21:21,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:21:21,939 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:21:21,939 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:21:21,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-02 20:21:22,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:21:22,154 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-02 20:21:22,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:21:22,155 INFO L85 PathProgramCache]: Analyzing trace with hash -67407280, now seen corresponding path program 10 times [2022-11-02 20:21:22,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:21:22,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332800129] [2022-11-02 20:21:22,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:21:22,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:21:22,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:21:23,162 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:21:23,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:21:23,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332800129] [2022-11-02 20:21:23,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332800129] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:21:23,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532795847] [2022-11-02 20:21:23,163 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:21:23,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:21:23,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:21:23,166 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:21:23,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-02 20:21:23,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:21:23,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:21:23,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-02 20:21:23,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:21:23,596 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:21:23,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:21:23,746 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:21:23,746 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 49 treesize of output 67 [2022-11-02 20:21:23,828 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:21:23,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532795847] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:21:23,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:21:23,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 5] total 21 [2022-11-02 20:21:23,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495570640] [2022-11-02 20:21:23,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:21:23,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-02 20:21:23,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:21:23,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-02 20:21:23,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-11-02 20:21:23,830 INFO L87 Difference]: Start difference. First operand 3301 states and 10885 transitions. Second operand has 23 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 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) [2022-11-02 20:21:25,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:21:25,461 INFO L93 Difference]: Finished difference Result 5373 states and 17175 transitions. [2022-11-02 20:21:25,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-02 20:21:25,462 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-02 20:21:25,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:21:25,472 INFO L225 Difference]: With dead ends: 5373 [2022-11-02 20:21:25,473 INFO L226 Difference]: Without dead ends: 5367 [2022-11-02 20:21:25,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=328, Invalid=1834, Unknown=0, NotChecked=0, Total=2162 [2022-11-02 20:21:25,474 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 332 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:21:25,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 48 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-02 20:21:25,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5367 states. [2022-11-02 20:21:25,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5367 to 3546. [2022-11-02 20:21:25,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3546 states, 3544 states have (on average 3.293453724604966) internal successors, (11672), 3545 states have internal predecessors, (11672), 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) [2022-11-02 20:21:25,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3546 states to 3546 states and 11672 transitions. [2022-11-02 20:21:25,577 INFO L78 Accepts]: Start accepts. Automaton has 3546 states and 11672 transitions. Word has length 18 [2022-11-02 20:21:25,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:21:25,578 INFO L495 AbstractCegarLoop]: Abstraction has 3546 states and 11672 transitions. [2022-11-02 20:21:25,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 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) [2022-11-02 20:21:25,578 INFO L276 IsEmpty]: Start isEmpty. Operand 3546 states and 11672 transitions. [2022-11-02 20:21:25,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:21:25,581 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:21:25,581 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:21:25,621 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-11-02 20:21:25,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-02 20:21:25,806 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-02 20:21:25,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:21:25,807 INFO L85 PathProgramCache]: Analyzing trace with hash -72394869, now seen corresponding path program 5 times [2022-11-02 20:21:25,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:21:25,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486375129] [2022-11-02 20:21:25,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:21:25,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:21:25,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:21:26,404 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:21:26,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:21:26,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486375129] [2022-11-02 20:21:26,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486375129] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:21:26,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945534556] [2022-11-02 20:21:26,405 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:21:26,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:21:26,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:21:26,407 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:21:26,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-02 20:21:26,587 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-02 20:21:26,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:21:26,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-02 20:21:26,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:21:26,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:21:26,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:21:27,008 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:21:27,008 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 50 treesize of output 68 [2022-11-02 20:21:27,107 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:21:27,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945534556] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:21:27,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:21:27,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 5] total 21 [2022-11-02 20:21:27,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175648500] [2022-11-02 20:21:27,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:21:27,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-02 20:21:27,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:21:27,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-02 20:21:27,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2022-11-02 20:21:27,110 INFO L87 Difference]: Start difference. First operand 3546 states and 11672 transitions. Second operand has 23 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 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) [2022-11-02 20:21:29,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:21:29,292 INFO L93 Difference]: Finished difference Result 7615 states and 23466 transitions. [2022-11-02 20:21:29,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-02 20:21:29,292 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-02 20:21:29,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:21:29,310 INFO L225 Difference]: With dead ends: 7615 [2022-11-02 20:21:29,310 INFO L226 Difference]: Without dead ends: 7432 [2022-11-02 20:21:29,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=373, Invalid=1979, Unknown=0, NotChecked=0, Total=2352 [2022-11-02 20:21:29,311 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 371 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 1160 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:21:29,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 69 Invalid, 1252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1160 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-02 20:21:29,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7432 states. [2022-11-02 20:21:29,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7432 to 4311. [2022-11-02 20:21:29,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4311 states, 4309 states have (on average 3.2849849152935717) internal successors, (14155), 4310 states have internal predecessors, (14155), 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) [2022-11-02 20:21:29,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4311 states to 4311 states and 14155 transitions. [2022-11-02 20:21:29,569 INFO L78 Accepts]: Start accepts. Automaton has 4311 states and 14155 transitions. Word has length 18 [2022-11-02 20:21:29,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:21:29,570 INFO L495 AbstractCegarLoop]: Abstraction has 4311 states and 14155 transitions. [2022-11-02 20:21:29,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 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) [2022-11-02 20:21:29,570 INFO L276 IsEmpty]: Start isEmpty. Operand 4311 states and 14155 transitions. [2022-11-02 20:21:29,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:21:29,574 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:21:29,575 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:21:29,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-02 20:21:29,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-02 20:21:29,802 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-02 20:21:29,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:21:29,803 INFO L85 PathProgramCache]: Analyzing trace with hash 630595851, now seen corresponding path program 6 times [2022-11-02 20:21:29,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:21:29,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558728281] [2022-11-02 20:21:29,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:21:29,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:21:29,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:21:30,813 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:21:30,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:21:30,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558728281] [2022-11-02 20:21:30,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558728281] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:21:30,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489394758] [2022-11-02 20:21:30,813 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:21:30,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:21:30,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:21:30,814 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:21:30,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-02 20:21:31,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-02 20:21:31,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:21:31,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 20:21:31,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:21:31,144 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:21:31,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:21:31,212 INFO L356 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-11-02 20:21:31,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2022-11-02 20:21:31,241 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:21:31,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489394758] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:21:31,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:21:31,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 17 [2022-11-02 20:21:31,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087401866] [2022-11-02 20:21:31,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:21:31,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 20:21:31,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:21:31,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 20:21:31,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:21:31,242 INFO L87 Difference]: Start difference. First operand 4311 states and 14155 transitions. Second operand has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:21:32,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:21:32,062 INFO L93 Difference]: Finished difference Result 6437 states and 20835 transitions. [2022-11-02 20:21:32,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:21:32,062 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-02 20:21:32,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:21:32,076 INFO L225 Difference]: With dead ends: 6437 [2022-11-02 20:21:32,076 INFO L226 Difference]: Without dead ends: 6410 [2022-11-02 20:21:32,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2022-11-02 20:21:32,077 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 261 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:21:32,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 51 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 776 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-02 20:21:32,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6410 states. [2022-11-02 20:21:32,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6410 to 3986. [2022-11-02 20:21:32,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3986 states, 3984 states have (on average 3.2816265060240966) internal successors, (13074), 3985 states have internal predecessors, (13074), 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) [2022-11-02 20:21:32,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3986 states to 3986 states and 13074 transitions. [2022-11-02 20:21:32,202 INFO L78 Accepts]: Start accepts. Automaton has 3986 states and 13074 transitions. Word has length 18 [2022-11-02 20:21:32,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:21:32,202 INFO L495 AbstractCegarLoop]: Abstraction has 3986 states and 13074 transitions. [2022-11-02 20:21:32,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:21:32,202 INFO L276 IsEmpty]: Start isEmpty. Operand 3986 states and 13074 transitions. [2022-11-02 20:21:32,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:21:32,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:21:32,206 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:21:32,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-02 20:21:32,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:21:32,418 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-02 20:21:32,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:21:32,419 INFO L85 PathProgramCache]: Analyzing trace with hash 2134622508, now seen corresponding path program 11 times [2022-11-02 20:21:32,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:21:32,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651918945] [2022-11-02 20:21:32,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:21:32,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:21:32,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:21:33,701 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:21:33,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:21:33,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651918945] [2022-11-02 20:21:33,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651918945] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:21:33,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248623819] [2022-11-02 20:21:33,702 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:21:33,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:21:33,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:21:33,703 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:21:33,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-02 20:21:33,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-02 20:21:33,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:21:33,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-02 20:21:33,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:21:34,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:21:34,026 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-02 20:21:34,217 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:21:34,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:21:34,393 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1481 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1481) c_~queue~0.base))) (or (< (let ((.cse1 (* c_~front~0 4))) (+ c_~d~0 (select .cse0 (+ c_~queue~0.offset .cse1)) (select .cse0 (+ c_~queue~0.offset .cse1 4)))) 2147483648) (not (= (select .cse0 (+ c_~queue~0.offset (* c_~back~0 4))) 1))))) is different from false [2022-11-02 20:21:34,425 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:21:34,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 98 treesize of output 116 [2022-11-02 20:21:34,444 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:21:34,445 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 55 [2022-11-02 20:21:34,772 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:21:34,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248623819] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:21:34,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:21:34,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 26 [2022-11-02 20:21:34,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902522814] [2022-11-02 20:21:34,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:21:34,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-02 20:21:34,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:21:34,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-02 20:21:34,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=622, Unknown=1, NotChecked=50, Total=756 [2022-11-02 20:21:34,774 INFO L87 Difference]: Start difference. First operand 3986 states and 13074 transitions. Second operand has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 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) [2022-11-02 20:21:37,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:21:37,434 INFO L93 Difference]: Finished difference Result 5772 states and 18232 transitions. [2022-11-02 20:21:37,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-02 20:21:37,435 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-02 20:21:37,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:21:37,445 INFO L225 Difference]: With dead ends: 5772 [2022-11-02 20:21:37,445 INFO L226 Difference]: Without dead ends: 5691 [2022-11-02 20:21:37,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=424, Invalid=2885, Unknown=1, NotChecked=112, Total=3422 [2022-11-02 20:21:37,446 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 445 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 1122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:21:37,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [445 Valid, 68 Invalid, 1122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 892 Invalid, 0 Unknown, 125 Unchecked, 0.8s Time] [2022-11-02 20:21:37,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5691 states. [2022-11-02 20:21:37,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5691 to 4091. [2022-11-02 20:21:37,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4091 states, 4089 states have (on average 3.267302518953289) internal successors, (13360), 4090 states have internal predecessors, (13360), 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) [2022-11-02 20:21:37,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4091 states to 4091 states and 13360 transitions. [2022-11-02 20:21:37,522 INFO L78 Accepts]: Start accepts. Automaton has 4091 states and 13360 transitions. Word has length 18 [2022-11-02 20:21:37,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:21:37,523 INFO L495 AbstractCegarLoop]: Abstraction has 4091 states and 13360 transitions. [2022-11-02 20:21:37,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 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) [2022-11-02 20:21:37,523 INFO L276 IsEmpty]: Start isEmpty. Operand 4091 states and 13360 transitions. [2022-11-02 20:21:37,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:21:37,526 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:21:37,527 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:21:37,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-02 20:21:37,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-02 20:21:37,754 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-02 20:21:37,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:21:37,755 INFO L85 PathProgramCache]: Analyzing trace with hash -720982036, now seen corresponding path program 12 times [2022-11-02 20:21:37,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:21:37,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352347850] [2022-11-02 20:21:37,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:21:37,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:21:37,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:21:39,100 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:21:39,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:21:39,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352347850] [2022-11-02 20:21:39,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352347850] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:21:39,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500915857] [2022-11-02 20:21:39,101 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:21:39,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:21:39,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:21:39,106 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:21:39,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-02 20:21:39,294 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-02 20:21:39,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:21:39,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-02 20:21:39,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:21:39,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:21:39,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2022-11-02 20:21:39,644 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:21:39,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:21:39,743 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1530 (Array Int Int))) (< (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1530) c_~queue~0.base)) (.cse1 (* c_~front~0 4))) (+ (select .cse0 (+ c_~queue~0.offset .cse1 4)) (select .cse0 (+ c_~queue~0.offset .cse1)) c_~d~0)) 2147483648)) is different from false [2022-11-02 20:21:39,835 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:21:39,835 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 77 treesize of output 95 [2022-11-02 20:21:39,842 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:21:39,842 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 6 [2022-11-02 20:21:39,992 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:21:39,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500915857] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:21:39,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:21:39,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 26 [2022-11-02 20:21:39,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553071504] [2022-11-02 20:21:39,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:21:39,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-02 20:21:39,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:21:39,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-02 20:21:39,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=613, Unknown=1, NotChecked=50, Total=756 [2022-11-02 20:21:39,994 INFO L87 Difference]: Start difference. First operand 4091 states and 13360 transitions. Second operand has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 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) [2022-11-02 20:21:41,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:21:41,264 INFO L93 Difference]: Finished difference Result 4462 states and 14432 transitions. [2022-11-02 20:21:41,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 20:21:41,265 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-02 20:21:41,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:21:41,272 INFO L225 Difference]: With dead ends: 4462 [2022-11-02 20:21:41,273 INFO L226 Difference]: Without dead ends: 4462 [2022-11-02 20:21:41,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=206, Invalid=1279, Unknown=1, NotChecked=74, Total=1560 [2022-11-02 20:21:41,273 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 340 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 186 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:21:41,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 44 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 698 Invalid, 0 Unknown, 186 Unchecked, 0.6s Time] [2022-11-02 20:21:41,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4462 states. [2022-11-02 20:21:41,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4462 to 4044. [2022-11-02 20:21:41,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4044 states, 4042 states have (on average 3.2736269173676398) internal successors, (13232), 4043 states have internal predecessors, (13232), 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) [2022-11-02 20:21:41,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4044 states to 4044 states and 13232 transitions. [2022-11-02 20:21:41,362 INFO L78 Accepts]: Start accepts. Automaton has 4044 states and 13232 transitions. Word has length 18 [2022-11-02 20:21:41,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:21:41,362 INFO L495 AbstractCegarLoop]: Abstraction has 4044 states and 13232 transitions. [2022-11-02 20:21:41,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 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) [2022-11-02 20:21:41,362 INFO L276 IsEmpty]: Start isEmpty. Operand 4044 states and 13232 transitions. [2022-11-02 20:21:41,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:21:41,365 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:21:41,365 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:21:41,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-02 20:21:41,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:21:41,566 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-02 20:21:41,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:21:41,568 INFO L85 PathProgramCache]: Analyzing trace with hash -720982035, now seen corresponding path program 7 times [2022-11-02 20:21:41,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:21:41,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493860947] [2022-11-02 20:21:41,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:21:41,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:21:41,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:21:42,323 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:21:42,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:21:42,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493860947] [2022-11-02 20:21:42,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493860947] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:21:42,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254892199] [2022-11-02 20:21:42,324 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 20:21:42,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:21:42,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:21:42,338 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:21:42,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-02 20:21:42,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:21:42,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-02 20:21:42,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:21:42,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:21:42,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-02 20:21:42,785 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:21:42,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:21:42,872 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1579 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1579) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 4)) 1))) is different from false [2022-11-02 20:21:42,883 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:21:42,884 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 45 [2022-11-02 20:21:42,887 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-11-02 20:21:43,011 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:21:43,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254892199] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:21:43,012 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:21:43,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 26 [2022-11-02 20:21:43,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366987194] [2022-11-02 20:21:43,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:21:43,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-02 20:21:43,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:21:43,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-02 20:21:43,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=619, Unknown=1, NotChecked=50, Total=756 [2022-11-02 20:21:43,014 INFO L87 Difference]: Start difference. First operand 4044 states and 13232 transitions. Second operand has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 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) [2022-11-02 20:21:44,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:21:44,605 INFO L93 Difference]: Finished difference Result 5363 states and 17160 transitions. [2022-11-02 20:21:44,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-02 20:21:44,605 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-02 20:21:44,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:21:44,616 INFO L225 Difference]: With dead ends: 5363 [2022-11-02 20:21:44,616 INFO L226 Difference]: Without dead ends: 5363 [2022-11-02 20:21:44,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=226, Invalid=1499, Unknown=1, NotChecked=80, Total=1806 [2022-11-02 20:21:44,617 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 415 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 1102 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:21:44,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 65 Invalid, 1316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1102 Invalid, 0 Unknown, 128 Unchecked, 0.8s Time] [2022-11-02 20:21:44,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5363 states. [2022-11-02 20:21:44,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5363 to 4029. [2022-11-02 20:21:44,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4029 states, 4027 states have (on average 3.2741494909361806) internal successors, (13185), 4028 states have internal predecessors, (13185), 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) [2022-11-02 20:21:44,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4029 states to 4029 states and 13185 transitions. [2022-11-02 20:21:44,744 INFO L78 Accepts]: Start accepts. Automaton has 4029 states and 13185 transitions. Word has length 18 [2022-11-02 20:21:44,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:21:44,745 INFO L495 AbstractCegarLoop]: Abstraction has 4029 states and 13185 transitions. [2022-11-02 20:21:44,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 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) [2022-11-02 20:21:44,745 INFO L276 IsEmpty]: Start isEmpty. Operand 4029 states and 13185 transitions. [2022-11-02 20:21:44,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:21:44,748 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:21:44,749 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:21:44,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-02 20:21:44,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-02 20:21:44,970 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-02 20:21:44,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:21:44,971 INFO L85 PathProgramCache]: Analyzing trace with hash -336750916, now seen corresponding path program 1 times [2022-11-02 20:21:44,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:21:44,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486698825] [2022-11-02 20:21:44,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:21:44,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:21:44,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:21:45,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:21:45,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:21:45,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486698825] [2022-11-02 20:21:45,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486698825] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:21:45,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925452775] [2022-11-02 20:21:45,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:21:45,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:21:45,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:21:45,866 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:21:45,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-02 20:21:46,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:21:46,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-02 20:21:46,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:21:46,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:21:46,181 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-02 20:21:46,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:21:46,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:21:46,474 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1628 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1628) c_~queue~0.base))) (or (< (let ((.cse1 (* c_~front~0 4))) (+ c_~d~0 (select .cse0 (+ c_~queue~0.offset .cse1)) (select .cse0 (+ c_~queue~0.offset .cse1 4)))) 2147483648) (not (= (select .cse0 (+ c_~queue~0.offset (* c_~back~0 4))) 1))))) is different from false [2022-11-02 20:21:46,502 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:21:46,502 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 98 treesize of output 116 [2022-11-02 20:21:46,519 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:21:46,519 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 55 [2022-11-02 20:21:46,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:21:46,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925452775] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:21:46,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:21:46,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 24 [2022-11-02 20:21:46,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947381067] [2022-11-02 20:21:46,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:21:46,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-02 20:21:46,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:21:46,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-02 20:21:46,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=529, Unknown=1, NotChecked=46, Total=650 [2022-11-02 20:21:46,782 INFO L87 Difference]: Start difference. First operand 4029 states and 13185 transitions. Second operand has 26 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 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) [2022-11-02 20:21:48,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:21:48,572 INFO L93 Difference]: Finished difference Result 6209 states and 19626 transitions. [2022-11-02 20:21:48,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-02 20:21:48,573 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-02 20:21:48,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:21:48,584 INFO L225 Difference]: With dead ends: 6209 [2022-11-02 20:21:48,584 INFO L226 Difference]: Without dead ends: 6110 [2022-11-02 20:21:48,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=258, Invalid=1637, Unknown=1, NotChecked=84, Total=1980 [2022-11-02 20:21:48,585 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 269 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 1185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 181 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:21:48,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 71 Invalid, 1185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 929 Invalid, 0 Unknown, 181 Unchecked, 0.8s Time] [2022-11-02 20:21:48,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6110 states. [2022-11-02 20:21:48,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6110 to 4251. [2022-11-02 20:21:48,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4251 states, 4249 states have (on average 3.2812426453283123) internal successors, (13942), 4250 states have internal predecessors, (13942), 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) [2022-11-02 20:21:48,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4251 states to 4251 states and 13942 transitions. [2022-11-02 20:21:48,670 INFO L78 Accepts]: Start accepts. Automaton has 4251 states and 13942 transitions. Word has length 18 [2022-11-02 20:21:48,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:21:48,670 INFO L495 AbstractCegarLoop]: Abstraction has 4251 states and 13942 transitions. [2022-11-02 20:21:48,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 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) [2022-11-02 20:21:48,670 INFO L276 IsEmpty]: Start isEmpty. Operand 4251 states and 13942 transitions. [2022-11-02 20:21:48,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:21:48,674 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:21:48,674 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:21:48,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-02 20:21:48,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-02 20:21:48,886 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-02 20:21:48,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:21:48,887 INFO L85 PathProgramCache]: Analyzing trace with hash 361252214, now seen corresponding path program 2 times [2022-11-02 20:21:48,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:21:48,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992019675] [2022-11-02 20:21:48,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:21:48,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:21:48,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:21:49,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:21:49,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:21:49,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992019675] [2022-11-02 20:21:49,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992019675] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:21:49,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884030670] [2022-11-02 20:21:49,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:21:49,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:21:49,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:21:49,672 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:21:49,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-02 20:21:49,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:21:49,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:21:49,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-02 20:21:49,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:21:49,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-02 20:21:50,006 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:21:50,051 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:21:50,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:21:50,160 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-02 20:21:50,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:21:50,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:21:51,268 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:21:51,269 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 93 [2022-11-02 20:21:51,334 INFO L356 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-11-02 20:21:51,335 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 848 treesize of output 842 [2022-11-02 20:21:51,368 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:21:51,369 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 726 treesize of output 600 [2022-11-02 20:21:51,433 INFO L356 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-11-02 20:21:51,433 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 638 treesize of output 602 [2022-11-02 20:21:51,504 INFO L356 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-11-02 20:21:51,505 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 427 treesize of output 435 [2022-11-02 20:21:56,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:21:56,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884030670] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:21:56,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:21:56,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 29 [2022-11-02 20:21:56,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251314243] [2022-11-02 20:21:56,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:21:56,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-02 20:21:56,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:21:56,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-02 20:21:56,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=795, Unknown=4, NotChecked=0, Total=930 [2022-11-02 20:21:56,999 INFO L87 Difference]: Start difference. First operand 4251 states and 13942 transitions. Second operand has 31 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 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) [2022-11-02 20:21:58,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:21:58,889 INFO L93 Difference]: Finished difference Result 5254 states and 17366 transitions. [2022-11-02 20:21:58,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-02 20:21:58,890 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-02 20:21:58,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:21:58,902 INFO L225 Difference]: With dead ends: 5254 [2022-11-02 20:21:58,902 INFO L226 Difference]: Without dead ends: 5254 [2022-11-02 20:21:58,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=322, Invalid=1831, Unknown=9, NotChecked=0, Total=2162 [2022-11-02 20:21:58,903 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 234 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 1205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 668 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:21:58,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 72 Invalid, 1205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 518 Invalid, 0 Unknown, 668 Unchecked, 0.4s Time] [2022-11-02 20:21:58,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5254 states. [2022-11-02 20:21:58,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5254 to 4786. [2022-11-02 20:21:58,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4786 states, 4784 states have (on average 3.3152173913043477) internal successors, (15860), 4785 states have internal predecessors, (15860), 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) [2022-11-02 20:21:58,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4786 states to 4786 states and 15860 transitions. [2022-11-02 20:21:58,989 INFO L78 Accepts]: Start accepts. Automaton has 4786 states and 15860 transitions. Word has length 18 [2022-11-02 20:21:58,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:21:58,990 INFO L495 AbstractCegarLoop]: Abstraction has 4786 states and 15860 transitions. [2022-11-02 20:21:58,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 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) [2022-11-02 20:21:58,990 INFO L276 IsEmpty]: Start isEmpty. Operand 4786 states and 15860 transitions. [2022-11-02 20:21:58,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:21:58,992 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:21:58,992 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:21:58,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-02 20:21:59,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-02 20:21:59,193 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-02 20:21:59,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:21:59,193 INFO L85 PathProgramCache]: Analyzing trace with hash -109173503, now seen corresponding path program 1 times [2022-11-02 20:21:59,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:21:59,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065571620] [2022-11-02 20:21:59,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:21:59,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:21:59,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:21:59,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:21:59,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:21:59,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065571620] [2022-11-02 20:21:59,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065571620] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:21:59,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222221666] [2022-11-02 20:21:59,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:21:59,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:21:59,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:21:59,838 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:21:59,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-02 20:21:59,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:21:59,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-02 20:21:59,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:22:00,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:22:00,230 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 40 [2022-11-02 20:22:00,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:22:00,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:22:00,358 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1730 (Array Int Int))) (< 0 (+ 2147483649 c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1730) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))) |c_thread2Thread1of1ForFork0_~temp~0#1|))) is different from false [2022-11-02 20:22:00,477 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:22:00,477 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 81 treesize of output 91 [2022-11-02 20:22:00,483 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 11 [2022-11-02 20:22:00,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:22:00,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222221666] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:22:00,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:22:00,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 24 [2022-11-02 20:22:00,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074602399] [2022-11-02 20:22:00,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:22:00,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-02 20:22:00,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:22:00,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-02 20:22:00,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=532, Unknown=1, NotChecked=46, Total=650 [2022-11-02 20:22:00,655 INFO L87 Difference]: Start difference. First operand 4786 states and 15860 transitions. Second operand has 26 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 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) [2022-11-02 20:22:02,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:22:02,314 INFO L93 Difference]: Finished difference Result 7404 states and 23735 transitions. [2022-11-02 20:22:02,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-02 20:22:02,315 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-02 20:22:02,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:22:02,331 INFO L225 Difference]: With dead ends: 7404 [2022-11-02 20:22:02,331 INFO L226 Difference]: Without dead ends: 7332 [2022-11-02 20:22:02,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=212, Invalid=1273, Unknown=1, NotChecked=74, Total=1560 [2022-11-02 20:22:02,332 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 240 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 305 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:22:02,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 54 Invalid, 1259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 887 Invalid, 0 Unknown, 305 Unchecked, 0.8s Time] [2022-11-02 20:22:02,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7332 states. [2022-11-02 20:22:02,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7332 to 4770. [2022-11-02 20:22:02,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4770 states, 4768 states have (on average 3.310192953020134) internal successors, (15783), 4769 states have internal predecessors, (15783), 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) [2022-11-02 20:22:02,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4770 states to 4770 states and 15783 transitions. [2022-11-02 20:22:02,473 INFO L78 Accepts]: Start accepts. Automaton has 4770 states and 15783 transitions. Word has length 18 [2022-11-02 20:22:02,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:22:02,474 INFO L495 AbstractCegarLoop]: Abstraction has 4770 states and 15783 transitions. [2022-11-02 20:22:02,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 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) [2022-11-02 20:22:02,474 INFO L276 IsEmpty]: Start isEmpty. Operand 4770 states and 15783 transitions. [2022-11-02 20:22:02,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:22:02,478 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:22:02,478 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:22:02,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-02 20:22:02,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:22:02,700 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-02 20:22:02,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:22:02,701 INFO L85 PathProgramCache]: Analyzing trace with hash -113498004, now seen corresponding path program 3 times [2022-11-02 20:22:02,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:22:02,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717006007] [2022-11-02 20:22:02,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:22:02,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:22:02,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:22:03,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:22:03,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:22:03,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717006007] [2022-11-02 20:22:03,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717006007] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:22:03,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558746754] [2022-11-02 20:22:03,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:22:03,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:22:03,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:22:03,380 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:22:03,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-02 20:22:03,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-02 20:22:03,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:22:03,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-02 20:22:03,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:22:03,650 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-02 20:22:03,711 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:22:03,769 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:22:04,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:22:04,165 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 40 [2022-11-02 20:22:04,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:22:04,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:22:05,137 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:22:05,137 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 87 [2022-11-02 20:22:05,184 INFO L356 Elim1Store]: treesize reduction 26, result has 60.0 percent of original size [2022-11-02 20:22:05,185 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1978 treesize of output 1807 [2022-11-02 20:22:05,204 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1638 treesize of output 1446 [2022-11-02 20:22:05,262 INFO L356 Elim1Store]: treesize reduction 26, result has 60.0 percent of original size [2022-11-02 20:22:05,262 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1577 treesize of output 1458 [2022-11-02 20:22:05,327 INFO L356 Elim1Store]: treesize reduction 26, result has 60.0 percent of original size [2022-11-02 20:22:05,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1420 treesize of output 1144 [2022-11-02 20:22:11,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:22:11,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558746754] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:22:11,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:22:11,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 29 [2022-11-02 20:22:11,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107118392] [2022-11-02 20:22:11,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:22:11,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-02 20:22:11,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:22:11,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-02 20:22:11,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=736, Unknown=3, NotChecked=0, Total=930 [2022-11-02 20:22:11,303 INFO L87 Difference]: Start difference. First operand 4770 states and 15783 transitions. Second operand has 31 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 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) [2022-11-02 20:22:12,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:22:12,694 INFO L93 Difference]: Finished difference Result 5176 states and 16863 transitions. [2022-11-02 20:22:12,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-02 20:22:12,694 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-02 20:22:12,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:22:12,704 INFO L225 Difference]: With dead ends: 5176 [2022-11-02 20:22:12,704 INFO L226 Difference]: Without dead ends: 5117 [2022-11-02 20:22:12,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=407, Invalid=1658, Unknown=5, NotChecked=0, Total=2070 [2022-11-02 20:22:12,705 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 262 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 1301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 977 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:22:12,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 73 Invalid, 1301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 303 Invalid, 0 Unknown, 977 Unchecked, 0.3s Time] [2022-11-02 20:22:12,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5117 states. [2022-11-02 20:22:12,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5117 to 4893. [2022-11-02 20:22:12,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4893 states, 4891 states have (on average 3.2976896340216726) internal successors, (16129), 4892 states have internal predecessors, (16129), 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) [2022-11-02 20:22:12,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4893 states to 4893 states and 16129 transitions. [2022-11-02 20:22:12,864 INFO L78 Accepts]: Start accepts. Automaton has 4893 states and 16129 transitions. Word has length 18 [2022-11-02 20:22:12,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:22:12,865 INFO L495 AbstractCegarLoop]: Abstraction has 4893 states and 16129 transitions. [2022-11-02 20:22:12,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 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) [2022-11-02 20:22:12,865 INFO L276 IsEmpty]: Start isEmpty. Operand 4893 states and 16129 transitions. [2022-11-02 20:22:12,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:22:12,869 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:22:12,869 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:22:12,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-02 20:22:13,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:22:13,082 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-02 20:22:13,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:22:13,083 INFO L85 PathProgramCache]: Analyzing trace with hash -268113294, now seen corresponding path program 4 times [2022-11-02 20:22:13,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:22:13,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546830454] [2022-11-02 20:22:13,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:22:13,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:22:13,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:22:13,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:22:13,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:22:13,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546830454] [2022-11-02 20:22:13,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546830454] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:22:13,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956699749] [2022-11-02 20:22:13,696 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:22:13,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:22:13,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:22:13,697 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:22:13,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-02 20:22:13,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:22:13,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:22:13,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-02 20:22:13,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:22:14,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:22:14,297 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 40 [2022-11-02 20:22:14,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:22:14,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:22:14,397 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1832 (Array Int Int))) (< (+ c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1832) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) 2147483648)) is different from false [2022-11-02 20:22:14,623 INFO L356 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-11-02 20:22:14,624 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 78 treesize of output 89 [2022-11-02 20:22:14,633 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 10 [2022-11-02 20:22:15,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:22:15,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956699749] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:22:15,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:22:15,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2022-11-02 20:22:15,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299615116] [2022-11-02 20:22:15,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:22:15,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-02 20:22:15,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:22:15,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-02 20:22:15,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=644, Unknown=3, NotChecked=52, Total=812 [2022-11-02 20:22:15,190 INFO L87 Difference]: Start difference. First operand 4893 states and 16129 transitions. Second operand has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 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) [2022-11-02 20:22:18,862 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse7 (* c_~front~0 4)) (.cse8 (* c_~back~0 4)) (.cse2 (< c_~n~0 (+ c_~back~0 2)))) (let ((.cse0 (or (< c_~d~0 2147483646) .cse2)) (.cse1 (or .cse2 (= .cse7 .cse8))) (.cse3 (or (< c_~n~0 (+ 3 c_~front~0)) .cse2)) (.cse5 (+ c_~queue~0.offset .cse7)) (.cse4 (not (<= 0 c_~back~0)))) (and (or (and .cse0 .cse1 (or .cse2 (not (= c_~queue~0.base |c_ULTIMATE.start_main_~#t3~0#1.base|))) .cse3) .cse4) (or (and .cse0 .cse1 (or .cse2 (< |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| |c_ULTIMATE.start_main_~#t3~0#1.base|)) .cse3) .cse4 (< (+ 2 |c_ULTIMATE.start_create_fresh_int_array_~i~0#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|)) (forall ((v_ArrVal_1832 (Array Int Int))) (< (+ c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1832) c_~queue~0.base) .cse5)) 2147483648)) (let ((.cse6 (select |c_#memory_int| c_~queue~0.base))) (or (forall ((v_ArrVal_1832 (Array Int Int))) (< (+ c_~d~0 (select .cse6 .cse5) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1832) c_~queue~0.base) (+ c_~queue~0.offset .cse7 4))) 2147483648)) (not (< c_~back~0 c_~n~0)) (not (= (select .cse6 (+ c_~queue~0.offset .cse8)) 1)) .cse4))))) is different from false [2022-11-02 20:22:19,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:22:19,805 INFO L93 Difference]: Finished difference Result 10412 states and 32683 transitions. [2022-11-02 20:22:19,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-02 20:22:19,805 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-02 20:22:19,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:22:19,828 INFO L225 Difference]: With dead ends: 10412 [2022-11-02 20:22:19,828 INFO L226 Difference]: Without dead ends: 10263 [2022-11-02 20:22:19,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 9 SemanticMatches, 62 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=729, Invalid=3054, Unknown=7, NotChecked=242, Total=4032 [2022-11-02 20:22:19,830 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 278 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 1830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 954 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:22:19,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 103 Invalid, 1830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 808 Invalid, 0 Unknown, 954 Unchecked, 0.7s Time] [2022-11-02 20:22:19,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10263 states. [2022-11-02 20:22:19,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10263 to 5631. [2022-11-02 20:22:19,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5631 states, 5628 states have (on average 3.2761194029850746) internal successors, (18438), 5630 states have internal predecessors, (18438), 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) [2022-11-02 20:22:19,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5631 states to 5631 states and 18438 transitions. [2022-11-02 20:22:19,990 INFO L78 Accepts]: Start accepts. Automaton has 5631 states and 18438 transitions. Word has length 18 [2022-11-02 20:22:19,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:22:19,990 INFO L495 AbstractCegarLoop]: Abstraction has 5631 states and 18438 transitions. [2022-11-02 20:22:19,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 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) [2022-11-02 20:22:19,990 INFO L276 IsEmpty]: Start isEmpty. Operand 5631 states and 18438 transitions. [2022-11-02 20:22:19,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:22:19,995 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:22:19,995 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:22:20,030 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-11-02 20:22:20,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-11-02 20:22:20,214 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-02 20:22:20,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:22:20,215 INFO L85 PathProgramCache]: Analyzing trace with hash -2041273614, now seen corresponding path program 5 times [2022-11-02 20:22:20,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:22:20,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769769201] [2022-11-02 20:22:20,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:22:20,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:22:20,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:22:20,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:22:20,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:22:20,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769769201] [2022-11-02 20:22:20,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769769201] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:22:20,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334374110] [2022-11-02 20:22:20,874 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:22:20,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:22:20,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:22:20,876 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:22:20,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-02 20:22:21,038 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:22:21,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:22:21,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-02 20:22:21,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:22:21,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:22:21,308 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 40 [2022-11-02 20:22:21,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:22:21,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:22:21,376 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1881 (Array Int Int))) (< (+ c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1881) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) 2147483648)) is different from false [2022-11-02 20:22:21,538 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:22:21,538 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 79 treesize of output 89 [2022-11-02 20:22:21,544 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 10 [2022-11-02 20:22:21,694 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:22:21,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334374110] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:22:21,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:22:21,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 24 [2022-11-02 20:22:21,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885136217] [2022-11-02 20:22:21,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:22:21,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-02 20:22:21,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:22:21,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-02 20:22:21,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=525, Unknown=2, NotChecked=46, Total=650 [2022-11-02 20:22:21,696 INFO L87 Difference]: Start difference. First operand 5631 states and 18438 transitions. Second operand has 26 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 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) [2022-11-02 20:22:23,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:22:23,467 INFO L93 Difference]: Finished difference Result 6305 states and 20242 transitions. [2022-11-02 20:22:23,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-02 20:22:23,467 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-02 20:22:23,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:22:23,481 INFO L225 Difference]: With dead ends: 6305 [2022-11-02 20:22:23,481 INFO L226 Difference]: Without dead ends: 6251 [2022-11-02 20:22:23,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=226, Invalid=1497, Unknown=3, NotChecked=80, Total=1806 [2022-11-02 20:22:23,482 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 262 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 409 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:22:23,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 58 Invalid, 1242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 795 Invalid, 0 Unknown, 409 Unchecked, 0.6s Time] [2022-11-02 20:22:23,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6251 states. [2022-11-02 20:22:23,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6251 to 5634. [2022-11-02 20:22:23,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5634 states, 5631 states have (on average 3.2724205292132837) internal successors, (18427), 5633 states have internal predecessors, (18427), 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) [2022-11-02 20:22:23,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5634 states to 5634 states and 18427 transitions. [2022-11-02 20:22:23,592 INFO L78 Accepts]: Start accepts. Automaton has 5634 states and 18427 transitions. Word has length 18 [2022-11-02 20:22:23,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:22:23,592 INFO L495 AbstractCegarLoop]: Abstraction has 5634 states and 18427 transitions. [2022-11-02 20:22:23,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 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) [2022-11-02 20:22:23,592 INFO L276 IsEmpty]: Start isEmpty. Operand 5634 states and 18427 transitions. [2022-11-02 20:22:23,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:22:23,597 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:22:23,597 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:22:23,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-02 20:22:23,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:22:23,806 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-02 20:22:23,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:22:23,807 INFO L85 PathProgramCache]: Analyzing trace with hash 149716156, now seen corresponding path program 6 times [2022-11-02 20:22:23,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:22:23,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731922216] [2022-11-02 20:22:23,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:22:23,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:22:23,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:22:24,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:22:24,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:22:24,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731922216] [2022-11-02 20:22:24,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731922216] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:22:24,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857730288] [2022-11-02 20:22:24,420 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:22:24,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:22:24,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:22:24,421 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:22:24,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-02 20:22:24,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-02 20:22:24,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:22:24,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-02 20:22:24,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:22:24,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:22:24,813 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2022-11-02 20:22:24,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:22:24,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:22:25,004 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1930 (Array Int Int))) (< (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1930) c_~queue~0.base)) (.cse1 (* c_~front~0 4))) (+ c_~d~0 (select .cse0 (+ c_~queue~0.offset .cse1 4)) (select .cse0 (+ c_~queue~0.offset .cse1)))) 2147483648)) is different from false [2022-11-02 20:22:25,081 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:22:25,082 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 77 treesize of output 95 [2022-11-02 20:22:25,128 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:22:25,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 6 [2022-11-02 20:22:25,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:22:25,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857730288] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:22:25,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:22:25,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 24 [2022-11-02 20:22:25,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673109338] [2022-11-02 20:22:25,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:22:25,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-02 20:22:25,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:22:25,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-02 20:22:25,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=522, Unknown=1, NotChecked=46, Total=650 [2022-11-02 20:22:25,240 INFO L87 Difference]: Start difference. First operand 5634 states and 18427 transitions. Second operand has 26 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 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) [2022-11-02 20:22:26,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:22:26,357 INFO L93 Difference]: Finished difference Result 6161 states and 19887 transitions. [2022-11-02 20:22:26,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-02 20:22:26,358 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-02 20:22:26,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:22:26,379 INFO L225 Difference]: With dead ends: 6161 [2022-11-02 20:22:26,380 INFO L226 Difference]: Without dead ends: 6161 [2022-11-02 20:22:26,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=173, Invalid=1090, Unknown=1, NotChecked=68, Total=1332 [2022-11-02 20:22:26,381 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 305 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 176 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:22:26,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 38 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 670 Invalid, 0 Unknown, 176 Unchecked, 0.5s Time] [2022-11-02 20:22:26,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6161 states. [2022-11-02 20:22:26,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6161 to 5708. [2022-11-02 20:22:26,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5708 states, 5705 states have (on average 3.271516213847502) internal successors, (18664), 5707 states have internal predecessors, (18664), 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) [2022-11-02 20:22:26,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5708 states to 5708 states and 18664 transitions. [2022-11-02 20:22:26,530 INFO L78 Accepts]: Start accepts. Automaton has 5708 states and 18664 transitions. Word has length 18 [2022-11-02 20:22:26,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:22:26,531 INFO L495 AbstractCegarLoop]: Abstraction has 5708 states and 18664 transitions. [2022-11-02 20:22:26,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 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) [2022-11-02 20:22:26,531 INFO L276 IsEmpty]: Start isEmpty. Operand 5708 states and 18664 transitions. [2022-11-02 20:22:26,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:22:26,535 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:22:26,535 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:22:26,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-02 20:22:26,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:22:26,736 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-02 20:22:26,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:22:26,736 INFO L85 PathProgramCache]: Analyzing trace with hash 149716157, now seen corresponding path program 2 times [2022-11-02 20:22:26,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:22:26,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533301263] [2022-11-02 20:22:26,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:22:26,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:22:26,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:22:27,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:22:27,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:22:27,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533301263] [2022-11-02 20:22:27,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533301263] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:22:27,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165240908] [2022-11-02 20:22:27,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:22:27,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:22:27,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:22:27,136 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:22:27,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-02 20:22:27,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:22:27,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:22:27,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-02 20:22:27,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:22:27,408 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-02 20:22:27,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:22:27,478 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-02 20:22:27,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:22:27,551 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-02 20:22:27,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:22:27,813 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2022-11-02 20:22:27,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:22:27,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:22:28,102 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1983 (Array Int Int))) (< 0 (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1983) c_~queue~0.base)) (.cse1 (* c_~front~0 4))) (+ 2147483649 c_~d~0 (select .cse0 (+ c_~queue~0.offset .cse1 4)) (select .cse0 (+ c_~queue~0.offset .cse1)))))) is different from false [2022-11-02 20:22:28,479 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:22:28,480 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 73 [2022-11-02 20:22:28,558 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:22:28,559 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 4061 treesize of output 3829 [2022-11-02 20:22:28,593 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 3622 treesize of output 2790 [2022-11-02 20:22:28,640 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:22:28,640 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2928 treesize of output 2734 [2022-11-02 20:22:28,691 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:22:28,692 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2708 treesize of output 2294 [2022-11-02 20:22:35,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:22:35,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165240908] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:22:35,491 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:22:35,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 29 [2022-11-02 20:22:35,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77582234] [2022-11-02 20:22:35,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:22:35,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-02 20:22:35,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:22:35,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-02 20:22:35,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=770, Unknown=2, NotChecked=56, Total=930 [2022-11-02 20:22:35,492 INFO L87 Difference]: Start difference. First operand 5708 states and 18664 transitions. Second operand has 31 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 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) [2022-11-02 20:22:36,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:22:36,416 INFO L93 Difference]: Finished difference Result 5781 states and 18929 transitions. [2022-11-02 20:22:36,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 20:22:36,417 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-02 20:22:36,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:22:36,432 INFO L225 Difference]: With dead ends: 5781 [2022-11-02 20:22:36,432 INFO L226 Difference]: Without dead ends: 5781 [2022-11-02 20:22:36,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=207, Invalid=1601, Unknown=2, NotChecked=82, Total=1892 [2022-11-02 20:22:36,433 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 21 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:22:36,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 61 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 146 Invalid, 0 Unknown, 104 Unchecked, 0.1s Time] [2022-11-02 20:22:36,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5781 states. [2022-11-02 20:22:36,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5781 to 5730. [2022-11-02 20:22:36,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5730 states, 5727 states have (on average 3.2741400384145276) internal successors, (18751), 5729 states have internal predecessors, (18751), 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) [2022-11-02 20:22:36,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5730 states to 5730 states and 18751 transitions. [2022-11-02 20:22:36,574 INFO L78 Accepts]: Start accepts. Automaton has 5730 states and 18751 transitions. Word has length 18 [2022-11-02 20:22:36,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:22:36,574 INFO L495 AbstractCegarLoop]: Abstraction has 5730 states and 18751 transitions. [2022-11-02 20:22:36,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 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) [2022-11-02 20:22:36,575 INFO L276 IsEmpty]: Start isEmpty. Operand 5730 states and 18751 transitions. [2022-11-02 20:22:36,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:22:36,579 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:22:36,579 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:22:36,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-02 20:22:36,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-11-02 20:22:36,779 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-02 20:22:36,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:22:36,780 INFO L85 PathProgramCache]: Analyzing trace with hash 54087046, now seen corresponding path program 7 times [2022-11-02 20:22:36,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:22:36,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474938513] [2022-11-02 20:22:36,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:22:36,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:22:36,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:22:37,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:22:37,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:22:37,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474938513] [2022-11-02 20:22:37,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474938513] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:22:37,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814772314] [2022-11-02 20:22:37,357 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 20:22:37,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:22:37,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:22:37,358 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:22:37,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-02 20:22:37,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:22:37,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-02 20:22:37,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:22:37,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:22:37,762 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 40 [2022-11-02 20:22:37,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:22:37,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:22:37,899 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2032 (Array Int Int))) (< (+ c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2032) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))) |c_thread2Thread1of1ForFork0_~temp~0#1|) 2147483648)) is different from false [2022-11-02 20:22:37,906 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2032 (Array Int Int))) (< (let ((.cse0 (* c_~front~0 4))) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2032) c_~queue~0.base) (+ c_~queue~0.offset .cse0 4)) c_~d~0 (select (select |c_#memory_int| c_~queue~0.base) (+ c_~queue~0.offset .cse0)))) 2147483648)) is different from false [2022-11-02 20:22:37,979 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:22:37,980 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 79 treesize of output 89 [2022-11-02 20:22:37,985 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 10 [2022-11-02 20:22:38,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2022-11-02 20:22:38,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814772314] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:22:38,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:22:38,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 24 [2022-11-02 20:22:38,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682491658] [2022-11-02 20:22:38,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:22:38,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-02 20:22:38,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:22:38,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-02 20:22:38,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=479, Unknown=2, NotChecked=90, Total=650 [2022-11-02 20:22:38,131 INFO L87 Difference]: Start difference. First operand 5730 states and 18751 transitions. Second operand has 26 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 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) [2022-11-02 20:22:39,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:22:39,511 INFO L93 Difference]: Finished difference Result 6281 states and 20302 transitions. [2022-11-02 20:22:39,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-02 20:22:39,511 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-02 20:22:39,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:22:39,526 INFO L225 Difference]: With dead ends: 6281 [2022-11-02 20:22:39,526 INFO L226 Difference]: Without dead ends: 6281 [2022-11-02 20:22:39,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=195, Invalid=1143, Unknown=2, NotChecked=142, Total=1482 [2022-11-02 20:22:39,527 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 291 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 1046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 283 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:22:39,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 41 Invalid, 1046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 719 Invalid, 0 Unknown, 283 Unchecked, 0.6s Time] [2022-11-02 20:22:39,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6281 states. [2022-11-02 20:22:39,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6281 to 5744. [2022-11-02 20:22:39,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5744 states, 5741 states have (on average 3.273297334959066) internal successors, (18792), 5743 states have internal predecessors, (18792), 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) [2022-11-02 20:22:39,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5744 states to 5744 states and 18792 transitions. [2022-11-02 20:22:39,644 INFO L78 Accepts]: Start accepts. Automaton has 5744 states and 18792 transitions. Word has length 18 [2022-11-02 20:22:39,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:22:39,644 INFO L495 AbstractCegarLoop]: Abstraction has 5744 states and 18792 transitions. [2022-11-02 20:22:39,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 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) [2022-11-02 20:22:39,645 INFO L276 IsEmpty]: Start isEmpty. Operand 5744 states and 18792 transitions. [2022-11-02 20:22:39,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:22:39,648 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:22:39,648 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:22:39,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-11-02 20:22:39,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-11-02 20:22:39,848 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-02 20:22:39,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:22:39,849 INFO L85 PathProgramCache]: Analyzing trace with hash 54087047, now seen corresponding path program 3 times [2022-11-02 20:22:39,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:22:39,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366525254] [2022-11-02 20:22:39,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:22:39,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:22:39,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:22:40,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:22:40,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:22:40,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366525254] [2022-11-02 20:22:40,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366525254] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:22:40,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418884317] [2022-11-02 20:22:40,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:22:40,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:22:40,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:22:40,471 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:22:40,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-02 20:22:40,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-02 20:22:40,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:22:40,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-02 20:22:40,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:22:40,799 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-02 20:22:40,850 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:22:40,893 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:22:41,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:22:41,090 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-02 20:22:41,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:22:41,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:22:41,233 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2085 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2085) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))) 1))) is different from false [2022-11-02 20:22:41,238 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2085 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2085) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 4)) 1))) is different from false [2022-11-02 20:22:41,568 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:22:41,569 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 55 [2022-11-02 20:22:41,580 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:22:41,580 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 508 treesize of output 484 [2022-11-02 20:22:41,594 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:22:41,594 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 472 treesize of output 428 [2022-11-02 20:22:41,605 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 300 treesize of output 244 [2022-11-02 20:22:41,622 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:22:41,622 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 230 [2022-11-02 20:22:42,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-02 20:22:42,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418884317] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:22:42,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:22:42,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 29 [2022-11-02 20:22:42,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468318760] [2022-11-02 20:22:42,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:22:42,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-02 20:22:42,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:22:42,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-02 20:22:42,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=698, Unknown=6, NotChecked=110, Total=930 [2022-11-02 20:22:42,141 INFO L87 Difference]: Start difference. First operand 5744 states and 18792 transitions. Second operand has 31 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 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) [2022-11-02 20:22:43,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:22:43,916 INFO L93 Difference]: Finished difference Result 6664 states and 21406 transitions. [2022-11-02 20:22:43,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-02 20:22:43,917 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-02 20:22:43,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:22:43,930 INFO L225 Difference]: With dead ends: 6664 [2022-11-02 20:22:43,931 INFO L226 Difference]: Without dead ends: 6664 [2022-11-02 20:22:43,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 8 SemanticMatches, 45 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=280, Invalid=1700, Unknown=8, NotChecked=174, Total=2162 [2022-11-02 20:22:43,931 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 328 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 591 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:22:43,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 51 Invalid, 1340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 697 Invalid, 0 Unknown, 591 Unchecked, 0.6s Time] [2022-11-02 20:22:43,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6664 states. [2022-11-02 20:22:44,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6664 to 5809. [2022-11-02 20:22:44,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5809 states, 5806 states have (on average 3.2676541508784016) internal successors, (18972), 5808 states have internal predecessors, (18972), 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) [2022-11-02 20:22:44,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5809 states to 5809 states and 18972 transitions. [2022-11-02 20:22:44,078 INFO L78 Accepts]: Start accepts. Automaton has 5809 states and 18972 transitions. Word has length 18 [2022-11-02 20:22:44,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:22:44,078 INFO L495 AbstractCegarLoop]: Abstraction has 5809 states and 18972 transitions. [2022-11-02 20:22:44,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 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) [2022-11-02 20:22:44,078 INFO L276 IsEmpty]: Start isEmpty. Operand 5809 states and 18972 transitions. [2022-11-02 20:22:44,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:22:44,081 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:22:44,082 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:22:44,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-11-02 20:22:44,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-11-02 20:22:44,282 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-02 20:22:44,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:22:44,282 INFO L85 PathProgramCache]: Analyzing trace with hash 49762546, now seen corresponding path program 8 times [2022-11-02 20:22:44,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:22:44,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532987573] [2022-11-02 20:22:44,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:22:44,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:22:44,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:22:44,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:22:44,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:22:44,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532987573] [2022-11-02 20:22:44,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532987573] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:22:44,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004751326] [2022-11-02 20:22:44,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:22:44,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:22:44,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:22:44,985 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:22:44,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-02 20:22:45,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:22:45,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:22:45,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-02 20:22:45,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:22:45,294 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-02 20:22:45,352 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:22:45,394 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:22:45,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:22:45,749 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2022-11-02 20:22:45,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:22:45,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:22:46,749 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:22:46,749 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 86 [2022-11-02 20:22:46,812 INFO L356 Elim1Store]: treesize reduction 24, result has 67.1 percent of original size [2022-11-02 20:22:46,813 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 3978 treesize of output 3610 [2022-11-02 20:22:46,903 INFO L356 Elim1Store]: treesize reduction 24, result has 67.1 percent of original size [2022-11-02 20:22:46,904 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 3562 treesize of output 3298 [2022-11-02 20:22:46,940 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2998 treesize of output 2614 [2022-11-02 20:22:47,016 INFO L356 Elim1Store]: treesize reduction 24, result has 67.1 percent of original size [2022-11-02 20:22:47,016 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 2866 treesize of output 2290 [2022-11-02 20:22:53,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:22:53,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004751326] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:22:53,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:22:53,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 29 [2022-11-02 20:22:53,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267248785] [2022-11-02 20:22:53,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:22:53,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-02 20:22:53,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:22:53,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-02 20:22:53,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=774, Unknown=2, NotChecked=0, Total=930 [2022-11-02 20:22:53,691 INFO L87 Difference]: Start difference. First operand 5809 states and 18972 transitions. Second operand has 31 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 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) [2022-11-02 20:22:56,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:22:56,022 INFO L93 Difference]: Finished difference Result 6102 states and 19895 transitions. [2022-11-02 20:22:56,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-02 20:22:56,023 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-02 20:22:56,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:22:56,036 INFO L225 Difference]: With dead ends: 6102 [2022-11-02 20:22:56,036 INFO L226 Difference]: Without dead ends: 6102 [2022-11-02 20:22:56,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=445, Invalid=2103, Unknown=2, NotChecked=0, Total=2550 [2022-11-02 20:22:56,037 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 100 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 276 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:22:56,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 63 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 204 Invalid, 0 Unknown, 276 Unchecked, 0.2s Time] [2022-11-02 20:22:56,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6102 states. [2022-11-02 20:22:56,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6102 to 5889. [2022-11-02 20:22:56,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5889 states, 5886 states have (on average 3.270472307169555) internal successors, (19250), 5888 states have internal predecessors, (19250), 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) [2022-11-02 20:22:56,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5889 states to 5889 states and 19250 transitions. [2022-11-02 20:22:56,173 INFO L78 Accepts]: Start accepts. Automaton has 5889 states and 19250 transitions. Word has length 18 [2022-11-02 20:22:56,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:22:56,173 INFO L495 AbstractCegarLoop]: Abstraction has 5889 states and 19250 transitions. [2022-11-02 20:22:56,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 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) [2022-11-02 20:22:56,174 INFO L276 IsEmpty]: Start isEmpty. Operand 5889 states and 19250 transitions. [2022-11-02 20:22:56,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:22:56,176 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:22:56,177 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:22:56,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-11-02 20:22:56,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-11-02 20:22:56,377 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-02 20:22:56,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:22:56,379 INFO L85 PathProgramCache]: Analyzing trace with hash -647246862, now seen corresponding path program 9 times [2022-11-02 20:22:56,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:22:56,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945822032] [2022-11-02 20:22:56,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:22:56,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:22:56,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:22:57,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:22:57,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:22:57,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945822032] [2022-11-02 20:22:57,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945822032] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:22:57,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026300591] [2022-11-02 20:22:57,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:22:57,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:22:57,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:22:57,160 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:22:57,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-02 20:22:57,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-02 20:22:57,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:22:57,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-02 20:22:57,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:22:57,477 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-02 20:22:57,527 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:22:57,594 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:22:57,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:22:57,965 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2022-11-02 20:22:58,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:22:58,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:22:58,880 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:22:58,881 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 87 [2022-11-02 20:22:58,934 INFO L356 Elim1Store]: treesize reduction 26, result has 60.0 percent of original size [2022-11-02 20:22:58,935 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1978 treesize of output 1807 [2022-11-02 20:22:59,000 INFO L356 Elim1Store]: treesize reduction 26, result has 60.0 percent of original size [2022-11-02 20:22:59,001 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1769 treesize of output 1493 [2022-11-02 20:22:59,030 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1350 treesize of output 1158 [2022-11-02 20:22:59,101 INFO L356 Elim1Store]: treesize reduction 26, result has 60.0 percent of original size [2022-11-02 20:22:59,102 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1263 treesize of output 1144 [2022-11-02 20:23:02,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:02,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026300591] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:23:02,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:23:02,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 29 [2022-11-02 20:23:02,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496413665] [2022-11-02 20:23:02,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:23:02,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-02 20:23:02,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:23:02,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-02 20:23:02,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=727, Unknown=1, NotChecked=0, Total=930 [2022-11-02 20:23:02,967 INFO L87 Difference]: Start difference. First operand 5889 states and 19250 transitions. Second operand has 31 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 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) [2022-11-02 20:23:06,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:23:06,279 INFO L93 Difference]: Finished difference Result 6851 states and 21960 transitions. [2022-11-02 20:23:06,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-02 20:23:06,280 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-02 20:23:06,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:23:06,294 INFO L225 Difference]: With dead ends: 6851 [2022-11-02 20:23:06,294 INFO L226 Difference]: Without dead ends: 6851 [2022-11-02 20:23:06,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=659, Invalid=2525, Unknown=8, NotChecked=0, Total=3192 [2022-11-02 20:23:06,295 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 493 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 1796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1393 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:23:06,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 64 Invalid, 1796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 379 Invalid, 0 Unknown, 1393 Unchecked, 0.4s Time] [2022-11-02 20:23:06,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6851 states. [2022-11-02 20:23:06,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6851 to 6248. [2022-11-02 20:23:06,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6248 states, 6245 states have (on average 3.2731785428342675) internal successors, (20441), 6247 states have internal predecessors, (20441), 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) [2022-11-02 20:23:06,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6248 states to 6248 states and 20441 transitions. [2022-11-02 20:23:06,406 INFO L78 Accepts]: Start accepts. Automaton has 6248 states and 20441 transitions. Word has length 18 [2022-11-02 20:23:06,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:23:06,406 INFO L495 AbstractCegarLoop]: Abstraction has 6248 states and 20441 transitions. [2022-11-02 20:23:06,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 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) [2022-11-02 20:23:06,406 INFO L276 IsEmpty]: Start isEmpty. Operand 6248 states and 20441 transitions. [2022-11-02 20:23:06,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:23:06,410 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:23:06,410 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:23:06,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-11-02 20:23:06,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-11-02 20:23:06,611 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-02 20:23:06,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:06,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1212021603, now seen corresponding path program 4 times [2022-11-02 20:23:06,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:23:06,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514402139] [2022-11-02 20:23:06,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:06,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:23:06,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:07,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:07,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:23:07,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514402139] [2022-11-02 20:23:07,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514402139] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:23:07,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815710305] [2022-11-02 20:23:07,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:23:07,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:23:07,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:23:07,406 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:23:07,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_763b5596-7e51-4dba-8278-7ed60e3d76bc/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-02 20:23:07,601 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:23:07,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:23:07,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-02 20:23:07,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:23:07,707 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-02 20:23:07,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:23:07,787 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-02 20:23:07,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:23:07,863 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22