./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-programs/partial_mod_count_limited_base.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability 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_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/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_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-programs/partial_mod_count_limited_base.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 461bd06f1b3f06d79cc4cf710543bc8daecc2e978ce52b7fb468042420cb9979 --- 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 20:40:36,719 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:40:36,724 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:40:36,772 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:40:36,772 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:40:36,776 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:40:36,778 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:40:36,782 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:40:36,784 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:40:36,790 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:40:36,790 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:40:36,793 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:40:36,793 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:40:36,796 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:40:36,797 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:40:36,799 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:40:36,800 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:40:36,801 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:40:36,803 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:40:36,811 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:40:36,813 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:40:36,814 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:40:36,818 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:40:36,819 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:40:36,827 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:40:36,827 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:40:36,828 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:40:36,830 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:40:36,830 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:40:36,831 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:40:36,832 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:40:36,833 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:40:36,835 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:40:36,836 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:40:36,837 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:40:36,837 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:40:36,838 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:40:36,838 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:40:36,838 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:40:36,839 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:40:36,840 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:40:36,841 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:40:36,881 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:40:36,881 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:40:36,882 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:40:36,882 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:40:36,883 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:40:36,883 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:40:36,884 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:40:36,884 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:40:36,884 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:40:36,884 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:40:36,885 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:40:36,886 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:40:36,886 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:40:36,886 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:40:36,886 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:40:36,887 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:40:36,887 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:40:36,887 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:40:36,887 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:40:36,887 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:40:36,888 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:40:36,888 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:40:36,888 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:40:36,888 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:40:36,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:40:36,889 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:40:36,890 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:40:36,891 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:40:36,891 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:40:36,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:40:36,891 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:40:36,891 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:40:36,892 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:40:36,892 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_74042cf8-a077-47df-a245-82e47b505020/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 461bd06f1b3f06d79cc4cf710543bc8daecc2e978ce52b7fb468042420cb9979 [2022-11-02 20:40:37,207 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:40:37,240 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:40:37,243 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:40:37,244 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:40:37,244 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:40:37,246 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/array-programs/partial_mod_count_limited_base.c [2022-11-02 20:40:37,329 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/data/a54a4ba1c/2703e15c34e04ba38c49d3f4c112bbbe/FLAG6f5b9f5e6 [2022-11-02 20:40:37,819 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:40:37,820 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/sv-benchmarks/c/array-programs/partial_mod_count_limited_base.c [2022-11-02 20:40:37,825 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/data/a54a4ba1c/2703e15c34e04ba38c49d3f4c112bbbe/FLAG6f5b9f5e6 [2022-11-02 20:40:38,234 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/data/a54a4ba1c/2703e15c34e04ba38c49d3f4c112bbbe [2022-11-02 20:40:38,239 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:40:38,241 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:40:38,244 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:40:38,244 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:40:38,248 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:40:38,249 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:40:38" (1/1) ... [2022-11-02 20:40:38,252 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ca7bce7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:38, skipping insertion in model container [2022-11-02 20:40:38,252 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:40:38" (1/1) ... [2022-11-02 20:40:38,259 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:40:38,275 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:40:38,480 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_74042cf8-a077-47df-a245-82e47b505020/sv-benchmarks/c/array-programs/partial_mod_count_limited_base.c[334,347] [2022-11-02 20:40:38,519 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:40:38,526 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:40:38,535 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_74042cf8-a077-47df-a245-82e47b505020/sv-benchmarks/c/array-programs/partial_mod_count_limited_base.c[334,347] [2022-11-02 20:40:38,543 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:40:38,556 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:40:38,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:38 WrapperNode [2022-11-02 20:40:38,557 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:40:38,558 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:40:38,558 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:40:38,558 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:40:38,566 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:38" (1/1) ... [2022-11-02 20:40:38,573 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:38" (1/1) ... [2022-11-02 20:40:38,592 INFO L138 Inliner]: procedures = 15, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 67 [2022-11-02 20:40:38,593 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:40:38,593 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:40:38,594 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:40:38,594 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:40:38,603 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:38" (1/1) ... [2022-11-02 20:40:38,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:38" (1/1) ... [2022-11-02 20:40:38,609 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:38" (1/1) ... [2022-11-02 20:40:38,609 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:38" (1/1) ... [2022-11-02 20:40:38,624 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:38" (1/1) ... [2022-11-02 20:40:38,628 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:38" (1/1) ... [2022-11-02 20:40:38,629 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:38" (1/1) ... [2022-11-02 20:40:38,630 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:38" (1/1) ... [2022-11-02 20:40:38,644 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:40:38,645 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:40:38,645 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:40:38,645 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:40:38,654 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:38" (1/1) ... [2022-11-02 20:40:38,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:40:38,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:40:38,694 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:40:38,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:40:38,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:40:38,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:40:38,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:40:38,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:40:38,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:40:38,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:40:38,735 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:40:38,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:40:38,823 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:40:38,825 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:40:39,085 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:40:39,091 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:40:39,091 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-02 20:40:39,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:40:39 BoogieIcfgContainer [2022-11-02 20:40:39,093 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:40:39,095 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:40:39,110 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:40:39,114 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:40:39,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:40:38" (1/3) ... [2022-11-02 20:40:39,115 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b1bbfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:40:39, skipping insertion in model container [2022-11-02 20:40:39,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:38" (2/3) ... [2022-11-02 20:40:39,115 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b1bbfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:40:39, skipping insertion in model container [2022-11-02 20:40:39,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:40:39" (3/3) ... [2022-11-02 20:40:39,116 INFO L112 eAbstractionObserver]: Analyzing ICFG partial_mod_count_limited_base.c [2022-11-02 20:40:39,135 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:40:39,150 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:40:39,214 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:40:39,224 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=PETRI_NET, 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;@16ee9ad1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:40:39,225 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:40:39,232 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.5) internal successors, (30), 21 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 20:40:39,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-02 20:40:39,238 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:40:39,239 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:40:39,240 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:40:39,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:39,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1939796378, now seen corresponding path program 1 times [2022-11-02 20:40:39,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:39,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760631402] [2022-11-02 20:40:39,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:39,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:39,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:39,467 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 20:40:39,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:40:39,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760631402] [2022-11-02 20:40:39,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760631402] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:40:39,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:40:39,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:40:39,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516940221] [2022-11-02 20:40:39,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:40:39,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:40:39,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:40:39,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:40:39,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:40:39,519 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.5) internal successors, (30), 21 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) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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 20:40:39,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:40:39,536 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2022-11-02 20:40:39,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:40:39,539 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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 20:40:39,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:40:39,546 INFO L225 Difference]: With dead ends: 41 [2022-11-02 20:40:39,546 INFO L226 Difference]: Without dead ends: 18 [2022-11-02 20:40:39,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:40:39,566 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:40:39,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:40:39,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-02 20:40:39,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-02 20:40:39,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:39,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2022-11-02 20:40:39,606 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 11 [2022-11-02 20:40:39,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:40:39,607 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2022-11-02 20:40:39,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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 20:40:39,607 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2022-11-02 20:40:39,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-02 20:40:39,608 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:40:39,608 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:40:39,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:40:39,609 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:40:39,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:39,610 INFO L85 PathProgramCache]: Analyzing trace with hash -54935082, now seen corresponding path program 1 times [2022-11-02 20:40:39,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:39,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48996282] [2022-11-02 20:40:39,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:39,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:39,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:39,727 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 20:40:39,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:40:39,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48996282] [2022-11-02 20:40:39,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48996282] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:40:39,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:40:39,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:40:39,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383985984] [2022-11-02 20:40:39,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:40:39,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:40:39,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:40:39,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:40:39,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:40:39,760 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 4 states, 4 states have (on average 2.75) 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 20:40:39,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:40:39,855 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2022-11-02 20:40:39,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:40:39,856 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-02 20:40:39,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:40:39,856 INFO L225 Difference]: With dead ends: 45 [2022-11-02 20:40:39,857 INFO L226 Difference]: Without dead ends: 31 [2022-11-02 20:40:39,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:40:39,858 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 45 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:40:39,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 23 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:40:39,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-02 20:40:39,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 20. [2022-11-02 20:40:39,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:39,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-11-02 20:40:39,865 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 11 [2022-11-02 20:40:39,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:40:39,865 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-11-02 20:40:39,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) 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 20:40:39,866 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-11-02 20:40:39,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-02 20:40:39,867 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:40:39,867 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:40:39,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:40:39,868 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:40:39,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:39,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1485448361, now seen corresponding path program 1 times [2022-11-02 20:40:39,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:39,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562236783] [2022-11-02 20:40:39,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:39,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:39,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:40,170 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 20:40:40,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:40:40,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562236783] [2022-11-02 20:40:40,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562236783] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:40:40,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:40:40,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:40:40,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238748687] [2022-11-02 20:40:40,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:40:40,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:40:40,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:40:40,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:40:40,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:40:40,173 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:40,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:40:40,264 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2022-11-02 20:40:40,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:40:40,265 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-02 20:40:40,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:40:40,266 INFO L225 Difference]: With dead ends: 45 [2022-11-02 20:40:40,266 INFO L226 Difference]: Without dead ends: 31 [2022-11-02 20:40:40,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 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 20:40:40,268 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 11 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:40:40,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 45 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:40:40,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-02 20:40:40,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2022-11-02 20:40:40,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:40,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-11-02 20:40:40,274 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 16 [2022-11-02 20:40:40,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:40:40,275 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-11-02 20:40:40,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:40,275 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-11-02 20:40:40,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-02 20:40:40,276 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:40:40,276 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:40:40,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 20:40:40,277 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:40:40,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:40,277 INFO L85 PathProgramCache]: Analyzing trace with hash -2129460565, now seen corresponding path program 1 times [2022-11-02 20:40:40,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:40,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101748736] [2022-11-02 20:40:40,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:40,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:40,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:40,392 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 20:40:40,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:40:40,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101748736] [2022-11-02 20:40:40,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101748736] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:40:40,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:40:40,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:40:40,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176880330] [2022-11-02 20:40:40,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:40:40,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:40:40,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:40:40,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:40:40,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:40:40,396 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:40,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:40:40,421 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2022-11-02 20:40:40,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:40:40,422 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-02 20:40:40,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:40:40,423 INFO L225 Difference]: With dead ends: 34 [2022-11-02 20:40:40,423 INFO L226 Difference]: Without dead ends: 32 [2022-11-02 20:40:40,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:40:40,425 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 16 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:40:40,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 45 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:40:40,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-02 20:40:40,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2022-11-02 20:40:40,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 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 20:40:40,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-11-02 20:40:40,433 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 16 [2022-11-02 20:40:40,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:40:40,433 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-11-02 20:40:40,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:40,434 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-11-02 20:40:40,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-02 20:40:40,434 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:40:40,434 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:40:40,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 20:40:40,435 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:40:40,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:40,436 INFO L85 PathProgramCache]: Analyzing trace with hash -2129520147, now seen corresponding path program 1 times [2022-11-02 20:40:40,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:40,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876821753] [2022-11-02 20:40:40,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:40,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:40,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:40,520 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 20:40:40,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:40:40,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876821753] [2022-11-02 20:40:40,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876821753] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:40:40,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:40:40,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:40:40,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494450415] [2022-11-02 20:40:40,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:40:40,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:40:40,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:40:40,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:40:40,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:40:40,524 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:40,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:40:40,563 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2022-11-02 20:40:40,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:40:40,564 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-02 20:40:40,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:40:40,565 INFO L225 Difference]: With dead ends: 40 [2022-11-02 20:40:40,565 INFO L226 Difference]: Without dead ends: 38 [2022-11-02 20:40:40,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:40:40,567 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 38 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:40:40,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 52 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:40:40,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-02 20:40:40,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2022-11-02 20:40:40,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states 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 20:40:40,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2022-11-02 20:40:40,574 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 16 [2022-11-02 20:40:40,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:40:40,575 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2022-11-02 20:40:40,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:40,575 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2022-11-02 20:40:40,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-02 20:40:40,576 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:40:40,576 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:40:40,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 20:40:40,577 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:40:40,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:40,578 INFO L85 PathProgramCache]: Analyzing trace with hash -593145504, now seen corresponding path program 1 times [2022-11-02 20:40:40,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:40,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034988202] [2022-11-02 20:40:40,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:40,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:40,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:40,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:40:40,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:40:40,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034988202] [2022-11-02 20:40:40,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034988202] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:40:40,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094639546] [2022-11-02 20:40:40,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:40,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:40:40,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:40:40,678 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:40:40,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:40:40,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:40,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:40:40,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:40:40,861 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:40:40,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:40:40,919 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:40:40,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094639546] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:40:40,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:40:40,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-11-02 20:40:40,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836350950] [2022-11-02 20:40:40,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:40:40,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:40:40,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:40:40,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:40:40,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:40:40,922 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 20:40:41,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:40:41,025 INFO L93 Difference]: Finished difference Result 123 states and 148 transitions. [2022-11-02 20:40:41,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:40:41,025 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-02 20:40:41,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:40:41,026 INFO L225 Difference]: With dead ends: 123 [2022-11-02 20:40:41,027 INFO L226 Difference]: Without dead ends: 97 [2022-11-02 20:40:41,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:40:41,028 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 169 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:40:41,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 41 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:40:41,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-02 20:40:41,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 46. [2022-11-02 20:40:41,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 45 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 20:40:41,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2022-11-02 20:40:41,037 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 22 [2022-11-02 20:40:41,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:40:41,037 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2022-11-02 20:40:41,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 20:40:41,038 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2022-11-02 20:40:41,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-02 20:40:41,039 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:40:41,040 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:40:41,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:40:41,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:40:41,255 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:40:41,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:41,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1836734985, now seen corresponding path program 1 times [2022-11-02 20:40:41,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:41,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28146670] [2022-11-02 20:40:41,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:41,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:41,282 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:40:41,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [190568953] [2022-11-02 20:40:41,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:41,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:40:41,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:40:41,299 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:40:41,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:40:41,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:41,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 20:40:41,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:40:41,450 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 20:40:41,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:40:41,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:40:41,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28146670] [2022-11-02 20:40:41,451 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:40:41,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190568953] [2022-11-02 20:40:41,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190568953] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:40:41,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:40:41,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:40:41,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748497026] [2022-11-02 20:40:41,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:40:41,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:40:41,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:40:41,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:40:41,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:40:41,458 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:41,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:40:41,487 INFO L93 Difference]: Finished difference Result 109 states and 133 transitions. [2022-11-02 20:40:41,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:40:41,488 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-02 20:40:41,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:40:41,492 INFO L225 Difference]: With dead ends: 109 [2022-11-02 20:40:41,492 INFO L226 Difference]: Without dead ends: 79 [2022-11-02 20:40:41,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:40:41,495 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 37 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:40:41,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 41 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:40:41,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-02 20:40:41,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2022-11-02 20:40:41,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 57 states have internal predecessors, (70), 0 states have call successors, (0), 0 states 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 20:40:41,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2022-11-02 20:40:41,512 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 37 [2022-11-02 20:40:41,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:40:41,513 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2022-11-02 20:40:41,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:40:41,513 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2022-11-02 20:40:41,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-02 20:40:41,515 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:40:41,515 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:40:41,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:40:41,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:40:41,739 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:40:41,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:41,739 INFO L85 PathProgramCache]: Analyzing trace with hash 467241801, now seen corresponding path program 1 times [2022-11-02 20:40:41,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:41,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302312018] [2022-11-02 20:40:41,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:41,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:41,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:41,965 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-02 20:40:41,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:40:41,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302312018] [2022-11-02 20:40:41,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302312018] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:40:41,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306959112] [2022-11-02 20:40:41,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:41,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:40:41,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:40:41,967 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:40:41,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:40:42,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:42,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:40:42,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:40:42,197 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:40:42,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:40:42,315 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:40:42,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306959112] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:40:42,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:40:42,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2022-11-02 20:40:42,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919896553] [2022-11-02 20:40:42,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:40:42,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:40:42,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:40:42,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:40:42,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:40:42,319 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 18 states, 18 states have (on average 4.333333333333333) internal successors, (78), 18 states have internal predecessors, (78), 0 states have call successors, (0), 0 states 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 20:40:42,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:40:42,905 INFO L93 Difference]: Finished difference Result 346 states and 426 transitions. [2022-11-02 20:40:42,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-02 20:40:42,908 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.333333333333333) internal successors, (78), 18 states have internal predecessors, (78), 0 states have call successors, (0), 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 37 [2022-11-02 20:40:42,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:40:42,910 INFO L225 Difference]: With dead ends: 346 [2022-11-02 20:40:42,910 INFO L226 Difference]: Without dead ends: 304 [2022-11-02 20:40:42,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=411, Invalid=779, Unknown=0, NotChecked=0, Total=1190 [2022-11-02 20:40:42,914 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 425 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:40:42,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [425 Valid, 141 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:40:42,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-11-02 20:40:42,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 113. [2022-11-02 20:40:42,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.2321428571428572) internal successors, (138), 112 states have internal predecessors, (138), 0 states have call successors, (0), 0 states 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 20:40:42,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 138 transitions. [2022-11-02 20:40:42,942 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 138 transitions. Word has length 37 [2022-11-02 20:40:42,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:40:42,942 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 138 transitions. [2022-11-02 20:40:42,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.333333333333333) internal successors, (78), 18 states have internal predecessors, (78), 0 states have call successors, (0), 0 states 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 20:40:42,943 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 138 transitions. [2022-11-02 20:40:42,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-02 20:40:42,944 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:40:42,944 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:40:42,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:40:43,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:40:43,160 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:40:43,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:43,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1314879253, now seen corresponding path program 2 times [2022-11-02 20:40:43,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:43,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012394579] [2022-11-02 20:40:43,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:43,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:43,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:43,671 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 141 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-11-02 20:40:43,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:40:43,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012394579] [2022-11-02 20:40:43,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012394579] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:40:43,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:40:43,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-02 20:40:43,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712428686] [2022-11-02 20:40:43,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:40:43,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:40:43,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:40:43,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:40:43,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:40:43,674 INFO L87 Difference]: Start difference. First operand 113 states and 138 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 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 20:40:43,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:40:43,795 INFO L93 Difference]: Finished difference Result 235 states and 283 transitions. [2022-11-02 20:40:43,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:40:43,796 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 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 67 [2022-11-02 20:40:43,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:40:43,798 INFO L225 Difference]: With dead ends: 235 [2022-11-02 20:40:43,798 INFO L226 Difference]: Without dead ends: 182 [2022-11-02 20:40:43,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:40:43,802 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:40:43,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 56 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:40:43,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-11-02 20:40:43,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 155. [2022-11-02 20:40:43,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.2012987012987013) internal successors, (185), 154 states have internal predecessors, (185), 0 states have call successors, (0), 0 states 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 20:40:43,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 185 transitions. [2022-11-02 20:40:43,840 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 185 transitions. Word has length 67 [2022-11-02 20:40:43,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:40:43,841 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 185 transitions. [2022-11-02 20:40:43,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 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 20:40:43,841 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 185 transitions. [2022-11-02 20:40:43,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-02 20:40:43,847 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:40:43,847 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 6, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:40:43,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-02 20:40:43,848 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:40:43,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:43,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1890253811, now seen corresponding path program 3 times [2022-11-02 20:40:43,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:43,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7159316] [2022-11-02 20:40:43,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:43,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:43,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:44,272 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 177 proven. 3 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-02 20:40:44,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:40:44,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7159316] [2022-11-02 20:40:44,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7159316] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:40:44,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340876945] [2022-11-02 20:40:44,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:40:44,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:40:44,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:40:44,274 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:40:44,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:40:44,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-02 20:40:44,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:40:44,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:40:44,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:40:44,469 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 20:40:44,507 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2022-11-02 20:40:44,595 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 82 proven. 5 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-11-02 20:40:44,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:40:44,781 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-11-02 20:40:44,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340876945] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:40:44,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:40:44,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 21 [2022-11-02 20:40:44,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774500018] [2022-11-02 20:40:44,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:40:44,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-02 20:40:44,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:40:44,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-02 20:40:44,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-11-02 20:40:44,788 INFO L87 Difference]: Start difference. First operand 155 states and 185 transitions. Second operand has 21 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 21 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 20:40:45,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:40:45,367 INFO L93 Difference]: Finished difference Result 278 states and 325 transitions. [2022-11-02 20:40:45,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-02 20:40:45,368 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 21 states have internal predecessors, (82), 0 states have call successors, (0), 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 67 [2022-11-02 20:40:45,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:40:45,369 INFO L225 Difference]: With dead ends: 278 [2022-11-02 20:40:45,369 INFO L226 Difference]: Without dead ends: 188 [2022-11-02 20:40:45,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=389, Invalid=943, Unknown=0, NotChecked=0, Total=1332 [2022-11-02 20:40:45,371 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 205 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:40:45,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 137 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:40:45,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-11-02 20:40:45,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 108. [2022-11-02 20:40:45,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.1495327102803738) internal successors, (123), 107 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 20:40:45,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 123 transitions. [2022-11-02 20:40:45,380 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 123 transitions. Word has length 67 [2022-11-02 20:40:45,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:40:45,381 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 123 transitions. [2022-11-02 20:40:45,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 21 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 20:40:45,381 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 123 transitions. [2022-11-02 20:40:45,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-02 20:40:45,382 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:40:45,382 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:40:45,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:40:45,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-02 20:40:45,603 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:40:45,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:45,603 INFO L85 PathProgramCache]: Analyzing trace with hash -573175961, now seen corresponding path program 2 times [2022-11-02 20:40:45,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:45,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689056023] [2022-11-02 20:40:45,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:45,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:45,621 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:40:45,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [417308502] [2022-11-02 20:40:45,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:40:45,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:40:45,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:40:45,622 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:40:45,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:40:45,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:40:45,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:40:45,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-02 20:40:45,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:40:46,057 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:40:46,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:40:46,375 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:40:46,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:40:46,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689056023] [2022-11-02 20:40:46,375 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:40:46,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417308502] [2022-11-02 20:40:46,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417308502] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:40:46,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:40:46,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-11-02 20:40:46,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867220394] [2022-11-02 20:40:46,376 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:40:46,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-02 20:40:46,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:40:46,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-02 20:40:46,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2022-11-02 20:40:46,378 INFO L87 Difference]: Start difference. First operand 108 states and 123 transitions. Second operand has 26 states, 26 states have (on average 4.576923076923077) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states 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 20:40:47,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:40:47,204 INFO L93 Difference]: Finished difference Result 696 states and 825 transitions. [2022-11-02 20:40:47,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-02 20:40:47,204 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.576923076923077) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 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 67 [2022-11-02 20:40:47,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:40:47,207 INFO L225 Difference]: With dead ends: 696 [2022-11-02 20:40:47,207 INFO L226 Difference]: Without dead ends: 621 [2022-11-02 20:40:47,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2022-11-02 20:40:47,209 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 1172 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1172 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:40:47,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1172 Valid, 195 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 20:40:47,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2022-11-02 20:40:47,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 210. [2022-11-02 20:40:47,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 1.1339712918660287) internal successors, (237), 209 states have internal predecessors, (237), 0 states have call successors, (0), 0 states 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 20:40:47,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 237 transitions. [2022-11-02 20:40:47,225 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 237 transitions. Word has length 67 [2022-11-02 20:40:47,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:40:47,226 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 237 transitions. [2022-11-02 20:40:47,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.576923076923077) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states 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 20:40:47,226 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 237 transitions. [2022-11-02 20:40:47,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-02 20:40:47,227 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:40:47,228 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 21, 21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:40:47,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:40:47,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-02 20:40:47,455 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:40:47,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:47,455 INFO L85 PathProgramCache]: Analyzing trace with hash -314647257, now seen corresponding path program 3 times [2022-11-02 20:40:47,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:47,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711031883] [2022-11-02 20:40:47,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:47,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:47,489 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:40:47,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1272706417] [2022-11-02 20:40:47,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:40:47,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:40:47,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:40:47,491 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:40:47,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:40:47,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-11-02 20:40:47,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:40:47,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:40:47,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:40:48,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 613 proven. 319 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2022-11-02 20:40:48,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:40:49,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 0 proven. 932 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2022-11-02 20:40:49,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:40:49,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711031883] [2022-11-02 20:40:49,217 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:40:49,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272706417] [2022-11-02 20:40:49,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272706417] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:40:49,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:40:49,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2022-11-02 20:40:49,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688503900] [2022-11-02 20:40:49,218 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:40:49,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-02 20:40:49,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:40:49,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-02 20:40:49,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=594, Unknown=0, NotChecked=0, Total=992 [2022-11-02 20:40:49,224 INFO L87 Difference]: Start difference. First operand 210 states and 237 transitions. Second operand has 32 states, 32 states have (on average 4.59375) internal successors, (147), 31 states have internal predecessors, (147), 0 states have call successors, (0), 0 states 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 20:40:52,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:40:52,659 INFO L93 Difference]: Finished difference Result 1882 states and 2267 transitions. [2022-11-02 20:40:52,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-11-02 20:40:52,659 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.59375) internal successors, (147), 31 states have internal predecessors, (147), 0 states have call successors, (0), 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 127 [2022-11-02 20:40:52,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:40:52,668 INFO L225 Difference]: With dead ends: 1882 [2022-11-02 20:40:52,668 INFO L226 Difference]: Without dead ends: 1861 [2022-11-02 20:40:52,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2983 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3082, Invalid=5474, Unknown=0, NotChecked=0, Total=8556 [2022-11-02 20:40:52,672 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 1519 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1519 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:40:52,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1519 Valid, 255 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-02 20:40:52,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2022-11-02 20:40:52,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 432. [2022-11-02 20:40:52,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 1.1809744779582367) internal successors, (509), 431 states have internal predecessors, (509), 0 states have call successors, (0), 0 states 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 20:40:52,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 509 transitions. [2022-11-02 20:40:52,728 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 509 transitions. Word has length 127 [2022-11-02 20:40:52,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:40:52,729 INFO L495 AbstractCegarLoop]: Abstraction has 432 states and 509 transitions. [2022-11-02 20:40:52,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.59375) internal successors, (147), 31 states have internal predecessors, (147), 0 states have call successors, (0), 0 states 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 20:40:52,729 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 509 transitions. [2022-11-02 20:40:52,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-02 20:40:52,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:40:52,731 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 24, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:40:52,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:40:52,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-02 20:40:52,943 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:40:52,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:52,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1490439733, now seen corresponding path program 2 times [2022-11-02 20:40:52,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:52,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224667602] [2022-11-02 20:40:52,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:52,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:53,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:54,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1408 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:40:54,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:40:54,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224667602] [2022-11-02 20:40:54,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224667602] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:40:54,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129288836] [2022-11-02 20:40:54,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:40:54,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:40:54,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:40:54,835 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:40:54,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:40:54,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:40:54,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:40:54,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-02 20:40:54,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:40:56,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1408 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:40:56,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:40:58,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1408 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:40:58,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129288836] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:40:58,775 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:40:58,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 78 [2022-11-02 20:40:58,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681698456] [2022-11-02 20:40:58,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:40:58,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-11-02 20:40:58,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:40:58,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-11-02 20:40:58,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2707, Invalid=3455, Unknown=0, NotChecked=0, Total=6162 [2022-11-02 20:40:58,780 INFO L87 Difference]: Start difference. First operand 432 states and 509 transitions. Second operand has 79 states, 79 states have (on average 4.822784810126582) internal successors, (381), 78 states have internal predecessors, (381), 0 states have call successors, (0), 0 states 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 20:41:03,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:03,911 INFO L93 Difference]: Finished difference Result 6229 states and 7420 transitions. [2022-11-02 20:41:03,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-02 20:41:03,912 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 4.822784810126582) internal successors, (381), 78 states have internal predecessors, (381), 0 states have call successors, (0), 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 137 [2022-11-02 20:41:03,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:03,933 INFO L225 Difference]: With dead ends: 6229 [2022-11-02 20:41:03,933 INFO L226 Difference]: Without dead ends: 5853 [2022-11-02 20:41:03,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3797 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=4082, Invalid=6630, Unknown=0, NotChecked=0, Total=10712 [2022-11-02 20:41:03,940 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 2854 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 417 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2854 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 417 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:41:03,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2854 Valid, 560 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [417 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-02 20:41:03,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5853 states. [2022-11-02 20:41:04,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5853 to 587. [2022-11-02 20:41:04,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 1.18259385665529) internal successors, (693), 586 states have internal predecessors, (693), 0 states have call successors, (0), 0 states 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 20:41:04,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 693 transitions. [2022-11-02 20:41:04,065 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 693 transitions. Word has length 137 [2022-11-02 20:41:04,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:04,067 INFO L495 AbstractCegarLoop]: Abstraction has 587 states and 693 transitions. [2022-11-02 20:41:04,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 4.822784810126582) internal successors, (381), 78 states have internal predecessors, (381), 0 states have call successors, (0), 0 states 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 20:41:04,067 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 693 transitions. [2022-11-02 20:41:04,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2022-11-02 20:41:04,074 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:04,074 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 49, 49, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:41:04,113 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-02 20:41:04,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:04,295 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:41:04,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:04,295 INFO L85 PathProgramCache]: Analyzing trace with hash -214224921, now seen corresponding path program 4 times [2022-11-02 20:41:04,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:04,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047195978] [2022-11-02 20:41:04,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:04,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:04,374 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:41:04,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [5413477] [2022-11-02 20:41:04,375 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:41:04,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:04,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:41:04,376 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:41:04,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:41:06,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:41:06,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:41:06,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-02 20:41:06,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:41:09,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6179 backedges. 0 proven. 6175 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:41:09,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:41:18,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6179 backedges. 0 proven. 6175 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:41:18,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:18,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047195978] [2022-11-02 20:41:18,898 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:41:18,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5413477] [2022-11-02 20:41:18,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5413477] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:41:18,899 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:41:18,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 105 [2022-11-02 20:41:18,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531320229] [2022-11-02 20:41:18,900 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:41:18,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-11-02 20:41:18,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:18,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-11-02 20:41:18,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5463, Invalid=5667, Unknown=0, NotChecked=0, Total=11130 [2022-11-02 20:41:18,911 INFO L87 Difference]: Start difference. First operand 587 states and 693 transitions. Second operand has 106 states, 106 states have (on average 4.89622641509434) internal successors, (519), 105 states have internal predecessors, (519), 0 states have call successors, (0), 0 states 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 20:41:50,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:50,783 INFO L93 Difference]: Finished difference Result 16704 states and 20014 transitions. [2022-11-02 20:41:50,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-11-02 20:41:50,785 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 4.89622641509434) internal successors, (519), 105 states have internal predecessors, (519), 0 states have call successors, (0), 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 267 [2022-11-02 20:41:50,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:50,836 INFO L225 Difference]: With dead ends: 16704 [2022-11-02 20:41:50,837 INFO L226 Difference]: Without dead ends: 16253 [2022-11-02 20:41:50,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 428 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5253 ImplicationChecksByTransitivity, 32.4s TimeCoverageRelationStatistics Valid=10869, Invalid=13623, Unknown=0, NotChecked=0, Total=24492 [2022-11-02 20:41:50,848 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 6262 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 796 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6262 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 1486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 796 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:41:50,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6262 Valid, 882 Invalid, 1486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [796 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-02 20:41:50,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16253 states. [2022-11-02 20:41:51,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16253 to 1029. [2022-11-02 20:41:51,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 1028 states have (on average 1.154669260700389) internal successors, (1187), 1028 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states 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 20:41:51,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 1187 transitions. [2022-11-02 20:41:51,684 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 1187 transitions. Word has length 267 [2022-11-02 20:41:51,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:51,684 INFO L495 AbstractCegarLoop]: Abstraction has 1029 states and 1187 transitions. [2022-11-02 20:41:51,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 4.89622641509434) internal successors, (519), 105 states have internal predecessors, (519), 0 states have call successors, (0), 0 states 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 20:41:51,685 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 1187 transitions. [2022-11-02 20:41:51,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-02 20:41:51,703 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:51,703 INFO L195 NwaCegarLoop]: trace histogram [102, 102, 102, 101, 101, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:41:51,746 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-02 20:41:51,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-02 20:41:51,931 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:41:51,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:51,932 INFO L85 PathProgramCache]: Analyzing trace with hash 253570599, now seen corresponding path program 5 times [2022-11-02 20:41:51,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:51,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102477636] [2022-11-02 20:41:51,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:51,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:52,054 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:41:52,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1700094562] [2022-11-02 20:41:52,054 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:41:52,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:52,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:41:52,056 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:41:52,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74042cf8-a077-47df-a245-82e47b505020/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process