./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/eqn5f.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7341f15f-2d10-42c6-86f1-46c05ada116f/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7341f15f-2d10-42c6-86f1-46c05ada116f/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7341f15f-2d10-42c6-86f1-46c05ada116f/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7341f15f-2d10-42c6-86f1-46c05ada116f/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/eqn5f.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7341f15f-2d10-42c6-86f1-46c05ada116f/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7341f15f-2d10-42c6-86f1-46c05ada116f/bin/uautomizer-vX5HgA9Q3a --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 d9916de8363461179d8fb51bbbca62f9fac89d50ba7961a3d354541c45153780 --- 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-b5237d8 [2022-11-21 16:16:07,745 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:16:07,748 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:16:07,788 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:16:07,790 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:16:07,795 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:16:07,796 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:16:07,798 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:16:07,801 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:16:07,805 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:16:07,807 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:16:07,809 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:16:07,811 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:16:07,818 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:16:07,819 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:16:07,821 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:16:07,823 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:16:07,824 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:16:07,826 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:16:07,827 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:16:07,833 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:16:07,834 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:16:07,837 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:16:07,838 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:16:07,841 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:16:07,844 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:16:07,845 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:16:07,847 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:16:07,848 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:16:07,850 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:16:07,852 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:16:07,853 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:16:07,854 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:16:07,856 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:16:07,857 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:16:07,857 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:16:07,858 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:16:07,858 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:16:07,858 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:16:07,860 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:16:07,861 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:16:07,862 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7341f15f-2d10-42c6-86f1-46c05ada116f/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 16:16:07,898 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:16:07,899 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:16:07,900 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:16:07,900 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:16:07,901 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:16:07,901 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:16:07,902 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:16:07,902 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:16:07,902 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:16:07,903 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:16:07,904 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:16:07,904 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:16:07,904 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:16:07,904 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:16:07,905 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 16:16:07,905 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:16:07,905 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 16:16:07,905 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:16:07,905 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 16:16:07,906 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:16:07,906 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 16:16:07,906 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:16:07,906 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:16:07,907 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:16:07,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:16:07,907 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:16:07,907 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:16:07,908 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 16:16:07,908 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 16:16:07,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 16:16:07,909 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 16:16:07,909 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 16:16:07,909 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 16:16:07,910 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_7341f15f-2d10-42c6-86f1-46c05ada116f/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7341f15f-2d10-42c6-86f1-46c05ada116f/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d9916de8363461179d8fb51bbbca62f9fac89d50ba7961a3d354541c45153780 [2022-11-21 16:16:08,214 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:16:08,250 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:16:08,253 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:16:08,254 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:16:08,254 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:16:08,256 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7341f15f-2d10-42c6-86f1-46c05ada116f/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/array-fpi/eqn5f.c [2022-11-21 16:16:11,352 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:16:11,544 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:16:11,545 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7341f15f-2d10-42c6-86f1-46c05ada116f/sv-benchmarks/c/array-fpi/eqn5f.c [2022-11-21 16:16:11,551 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7341f15f-2d10-42c6-86f1-46c05ada116f/bin/uautomizer-vX5HgA9Q3a/data/0480a2769/df77f6ed0754431eb4a03ef0cdfb675a/FLAGb0ec4f1c2 [2022-11-21 16:16:11,566 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7341f15f-2d10-42c6-86f1-46c05ada116f/bin/uautomizer-vX5HgA9Q3a/data/0480a2769/df77f6ed0754431eb4a03ef0cdfb675a [2022-11-21 16:16:11,569 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:16:11,570 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:16:11,572 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:16:11,572 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:16:11,576 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:16:11,577 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:16:11" (1/1) ... [2022-11-21 16:16:11,578 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21e50337 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:16:11, skipping insertion in model container [2022-11-21 16:16:11,578 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:16:11" (1/1) ... [2022-11-21 16:16:11,590 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:16:11,609 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:16:11,805 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7341f15f-2d10-42c6-86f1-46c05ada116f/sv-benchmarks/c/array-fpi/eqn5f.c[588,601] [2022-11-21 16:16:11,840 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:16:11,858 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 16:16:11,878 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7341f15f-2d10-42c6-86f1-46c05ada116f/sv-benchmarks/c/array-fpi/eqn5f.c[588,601] [2022-11-21 16:16:11,898 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:16:11,914 INFO L208 MainTranslator]: Completed translation [2022-11-21 16:16:11,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:16:11 WrapperNode [2022-11-21 16:16:11,915 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:16:11,917 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 16:16:11,917 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 16:16:11,917 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 16:16:11,925 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:16:11" (1/1) ... [2022-11-21 16:16:11,933 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:16:11" (1/1) ... [2022-11-21 16:16:11,957 INFO L138 Inliner]: procedures = 16, calls = 27, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 80 [2022-11-21 16:16:11,958 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 16:16:11,958 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 16:16:11,958 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 16:16:11,959 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 16:16:11,968 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:16:11" (1/1) ... [2022-11-21 16:16:11,968 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:16:11" (1/1) ... [2022-11-21 16:16:11,971 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:16:11" (1/1) ... [2022-11-21 16:16:11,971 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:16:11" (1/1) ... [2022-11-21 16:16:11,977 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:16:11" (1/1) ... [2022-11-21 16:16:11,981 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:16:11" (1/1) ... [2022-11-21 16:16:11,982 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:16:11" (1/1) ... [2022-11-21 16:16:11,983 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:16:11" (1/1) ... [2022-11-21 16:16:11,985 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 16:16:11,986 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 16:16:11,986 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 16:16:11,987 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 16:16:11,988 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:16:11" (1/1) ... [2022-11-21 16:16:11,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:16:12,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7341f15f-2d10-42c6-86f1-46c05ada116f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:16:12,028 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7341f15f-2d10-42c6-86f1-46c05ada116f/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 16:16:12,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7341f15f-2d10-42c6-86f1-46c05ada116f/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 16:16:12,077 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 16:16:12,077 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 16:16:12,077 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 16:16:12,078 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-21 16:16:12,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 16:16:12,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 16:16:12,079 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 16:16:12,155 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 16:16:12,159 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 16:16:12,327 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 16:16:12,334 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 16:16:12,334 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-21 16:16:12,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:16:12 BoogieIcfgContainer [2022-11-21 16:16:12,337 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 16:16:12,340 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 16:16:12,340 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 16:16:12,344 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 16:16:12,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 04:16:11" (1/3) ... [2022-11-21 16:16:12,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9bda9a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:16:12, skipping insertion in model container [2022-11-21 16:16:12,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:16:11" (2/3) ... [2022-11-21 16:16:12,346 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9bda9a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:16:12, skipping insertion in model container [2022-11-21 16:16:12,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:16:12" (3/3) ... [2022-11-21 16:16:12,347 INFO L112 eAbstractionObserver]: Analyzing ICFG eqn5f.c [2022-11-21 16:16:12,382 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 16:16:12,382 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 16:16:12,444 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:16:12,454 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;@348cf044, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:16:12,454 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-21 16:16:12,459 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:16:12,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-21 16:16:12,465 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:16:12,466 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:16:12,467 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:16:12,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:16:12,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2022-11-21 16:16:12,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:16:12,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004568907] [2022-11-21 16:16:12,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:16:12,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:16:12,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:16:12,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:16:12,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004568907] [2022-11-21 16:16:12,671 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-21 16:16:12,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502252963] [2022-11-21 16:16:12,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:16:12,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:16:12,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7341f15f-2d10-42c6-86f1-46c05ada116f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:16:12,675 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7341f15f-2d10-42c6-86f1-46c05ada116f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:16:12,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7341f15f-2d10-42c6-86f1-46c05ada116f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 16:16:12,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:16:12,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-21 16:16:12,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:16:12,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:16:12,834 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:16:12,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502252963] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:16:12,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:16:12,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:16:12,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139520645] [2022-11-21 16:16:12,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:16:12,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 16:16:12,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:16:12,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 16:16:12,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 16:16:12,891 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:16:12,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:16:12,910 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2022-11-21 16:16:12,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 16:16:12,912 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-21 16:16:12,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:16:12,920 INFO L225 Difference]: With dead ends: 38 [2022-11-21 16:16:12,920 INFO L226 Difference]: Without dead ends: 17 [2022-11-21 16:16:12,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 16:16:12,930 INFO L413 NwaCegarLoop]: 24 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, 24 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 [2022-11-21 16:16:12,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:16:12,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-21 16:16:12,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-21 16:16:12,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:16:12,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-11-21 16:16:12,965 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2022-11-21 16:16:12,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:16:12,966 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-11-21 16:16:12,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:16:12,967 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-11-21 16:16:12,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-21 16:16:12,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:16:12,968 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:16:12,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7341f15f-2d10-42c6-86f1-46c05ada116f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 16:16:13,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7341f15f-2d10-42c6-86f1-46c05ada116f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-21 16:16:13,175 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:16:13,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:16:13,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2022-11-21 16:16:13,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:16:13,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160139355] [2022-11-21 16:16:13,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:16:13,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:16:13,224 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:16:13,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1581568890] [2022-11-21 16:16:13,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:16:13,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:16:13,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7341f15f-2d10-42c6-86f1-46c05ada116f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:16:13,228 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7341f15f-2d10-42c6-86f1-46c05ada116f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:16:13,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7341f15f-2d10-42c6-86f1-46c05ada116f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 16:16:13,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:16:13,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-21 16:16:13,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:16:13,474 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-21 16:16:13,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-21 16:16:13,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-21 16:16:13,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-21 16:16:13,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-21 16:16:13,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:16:13,724 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:16:13,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:16:13,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160139355] [2022-11-21 16:16:13,725 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:16:13,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581568890] [2022-11-21 16:16:13,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581568890] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:16:13,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:16:13,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 16:16:13,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952022716] [2022-11-21 16:16:13,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:16:13,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:16:13,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:16:13,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:16:13,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:16:13,729 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:16:13,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:16:13,809 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-11-21 16:16:13,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:16:13,810 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-21 16:16:13,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:16:13,811 INFO L225 Difference]: With dead ends: 34 [2022-11-21 16:16:13,811 INFO L226 Difference]: Without dead ends: 32 [2022-11-21 16:16:13,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-21 16:16:13,813 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 15 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:16:13,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 56 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:16:13,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-21 16:16:13,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2022-11-21 16:16:13,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:16:13,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-11-21 16:16:13,820 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2022-11-21 16:16:13,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:16:13,821 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-11-21 16:16:13,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:16:13,821 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-11-21 16:16:13,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-21 16:16:13,822 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:16:13,822 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:16:13,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7341f15f-2d10-42c6-86f1-46c05ada116f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 16:16:14,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7341f15f-2d10-42c6-86f1-46c05ada116f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:16:14,028 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:16:14,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:16:14,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1755224028, now seen corresponding path program 1 times [2022-11-21 16:16:14,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:16:14,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575093992] [2022-11-21 16:16:14,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:16:14,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:16:14,069 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:16:14,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [596156078] [2022-11-21 16:16:14,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:16:14,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:16:14,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7341f15f-2d10-42c6-86f1-46c05ada116f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:16:14,075 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7341f15f-2d10-42c6-86f1-46c05ada116f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:16:14,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7341f15f-2d10-42c6-86f1-46c05ada116f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 16:16:14,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:16:14,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 16:16:14,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:16:14,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:16:14,211 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:16:14,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:16:14,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575093992] [2022-11-21 16:16:14,212 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:16:14,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596156078] [2022-11-21 16:16:14,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596156078] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:16:14,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:16:14,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 16:16:14,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430930485] [2022-11-21 16:16:14,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:16:14,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:16:14,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:16:14,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:16:14,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:16:14,216 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:16:14,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:16:14,307 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2022-11-21 16:16:14,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:16:14,308 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-21 16:16:14,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:16:14,309 INFO L225 Difference]: With dead ends: 49 [2022-11-21 16:16:14,311 INFO L226 Difference]: Without dead ends: 40 [2022-11-21 16:16:14,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-21 16:16:14,318 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:16:14,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 29 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:16:14,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-21 16:16:14,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 23. [2022-11-21 16:16:14,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 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) [2022-11-21 16:16:14,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-11-21 16:16:14,329 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2022-11-21 16:16:14,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:16:14,330 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-11-21 16:16:14,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:16:14,330 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-11-21 16:16:14,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-21 16:16:14,331 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:16:14,331 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:16:14,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7341f15f-2d10-42c6-86f1-46c05ada116f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 16:16:14,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7341f15f-2d10-42c6-86f1-46c05ada116f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:16:14,532 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:16:14,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:16:14,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1842440164, now seen corresponding path program 1 times [2022-11-21 16:16:14,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:16:14,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302176262] [2022-11-21 16:16:14,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:16:14,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:16:14,567 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:16:14,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1955255651] [2022-11-21 16:16:14,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:16:14,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:16:14,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7341f15f-2d10-42c6-86f1-46c05ada116f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:16:14,574 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7341f15f-2d10-42c6-86f1-46c05ada116f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:16:14,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7341f15f-2d10-42c6-86f1-46c05ada116f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 16:16:14,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:16:14,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 16:16:14,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:16:14,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:16:14,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:16:14,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:16:14,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:16:14,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302176262] [2022-11-21 16:16:14,754 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:16:14,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955255651] [2022-11-21 16:16:14,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955255651] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:16:14,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:16:14,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2022-11-21 16:16:14,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619815040] [2022-11-21 16:16:14,755 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:16:14,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:16:14,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:16:14,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:16:14,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:16:14,758 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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) [2022-11-21 16:16:14,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:16:14,879 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2022-11-21 16:16:14,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 16:16:14,883 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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 14 [2022-11-21 16:16:14,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:16:14,885 INFO L225 Difference]: With dead ends: 44 [2022-11-21 16:16:14,885 INFO L226 Difference]: Without dead ends: 37 [2022-11-21 16:16:14,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-11-21 16:16:14,892 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 35 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:16:14,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 41 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:16:14,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-21 16:16:14,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2022-11-21 16:16:14,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:16:14,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-11-21 16:16:14,902 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 14 [2022-11-21 16:16:14,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:16:14,903 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-11-21 16:16:14,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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) [2022-11-21 16:16:14,903 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-11-21 16:16:14,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-21 16:16:14,904 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:16:14,904 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:16:14,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7341f15f-2d10-42c6-86f1-46c05ada116f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-21 16:16:15,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7341f15f-2d10-42c6-86f1-46c05ada116f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:16:15,110 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:16:15,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:16:15,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1667884396, now seen corresponding path program 1 times [2022-11-21 16:16:15,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:16:15,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788100577] [2022-11-21 16:16:15,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:16:15,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:16:15,133 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:16:15,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [615462567] [2022-11-21 16:16:15,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:16:15,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:16:15,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7341f15f-2d10-42c6-86f1-46c05ada116f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:16:15,135 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7341f15f-2d10-42c6-86f1-46c05ada116f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:16:15,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7341f15f-2d10-42c6-86f1-46c05ada116f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 16:16:15,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:16:15,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 16:16:15,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:16:15,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:16:15,336 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:16:15,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:16:15,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788100577] [2022-11-21 16:16:15,337 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:16:15,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615462567] [2022-11-21 16:16:15,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615462567] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:16:15,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:16:15,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 16:16:15,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875229817] [2022-11-21 16:16:15,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:16:15,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:16:15,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:16:15,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:16:15,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:16:15,340 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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) [2022-11-21 16:16:15,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:16:15,425 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2022-11-21 16:16:15,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 16:16:15,426 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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 [2022-11-21 16:16:15,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:16:15,427 INFO L225 Difference]: With dead ends: 41 [2022-11-21 16:16:15,427 INFO L226 Difference]: Without dead ends: 27 [2022-11-21 16:16:15,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-21 16:16:15,428 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 19 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:16:15,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 27 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:16:15,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-21 16:16:15,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2022-11-21 16:16:15,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:16:15,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-11-21 16:16:15,433 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2022-11-21 16:16:15,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:16:15,434 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-11-21 16:16:15,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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) [2022-11-21 16:16:15,434 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-11-21 16:16:15,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-21 16:16:15,435 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:16:15,435 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:16:15,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7341f15f-2d10-42c6-86f1-46c05ada116f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-21 16:16:15,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7341f15f-2d10-42c6-86f1-46c05ada116f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:16:15,648 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:16:15,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:16:15,649 INFO L85 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2022-11-21 16:16:15,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:16:15,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068682521] [2022-11-21 16:16:15,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:16:15,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:16:15,677 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:16:15,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2047624374] [2022-11-21 16:16:15,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:16:15,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:16:15,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7341f15f-2d10-42c6-86f1-46c05ada116f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:16:15,684 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7341f15f-2d10-42c6-86f1-46c05ada116f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:16:15,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7341f15f-2d10-42c6-86f1-46c05ada116f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-21 16:16:15,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:16:15,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-21 16:16:15,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:16:15,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-21 16:16:15,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:16:15,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-21 16:16:15,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-21 16:16:15,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-21 16:16:15,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:16:15,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-21 16:16:15,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:16:15,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:16:16,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:16:16,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:16:16,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068682521] [2022-11-21 16:16:16,108 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:16:16,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047624374] [2022-11-21 16:16:16,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047624374] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:16:16,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:16:16,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-11-21 16:16:16,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669035473] [2022-11-21 16:16:16,110 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:16:16,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 16:16:16,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:16:16,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 16:16:16,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=94, Unknown=4, NotChecked=0, Total=132 [2022-11-21 16:16:16,112 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:16:16,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:16:16,465 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2022-11-21 16:16:16,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-21 16:16:16,466 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 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 [2022-11-21 16:16:16,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:16:16,467 INFO L225 Difference]: With dead ends: 54 [2022-11-21 16:16:16,467 INFO L226 Difference]: Without dead ends: 52 [2022-11-21 16:16:16,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=261, Unknown=4, NotChecked=0, Total=380 [2022-11-21 16:16:16,468 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 112 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:16:16,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 61 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:16:16,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-21 16:16:16,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 26. [2022-11-21 16:16:16,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 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) [2022-11-21 16:16:16,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-11-21 16:16:16,476 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 16 [2022-11-21 16:16:16,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:16:16,476 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-11-21 16:16:16,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:16:16,477 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-11-21 16:16:16,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-21 16:16:16,477 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:16:16,478 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:16:16,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7341f15f-2d10-42c6-86f1-46c05ada116f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-21 16:16:16,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7341f15f-2d10-42c6-86f1-46c05ada116f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:16:16,684 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:16:16,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:16:16,685 INFO L85 PathProgramCache]: Analyzing trace with hash 798963152, now seen corresponding path program 1 times [2022-11-21 16:16:16,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:16:16,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799898585] [2022-11-21 16:16:16,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:16:16,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:16:16,704 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:16:16,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1077221029] [2022-11-21 16:16:16,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:16:16,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:16:16,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7341f15f-2d10-42c6-86f1-46c05ada116f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:16:16,706 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7341f15f-2d10-42c6-86f1-46c05ada116f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:16:16,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7341f15f-2d10-42c6-86f1-46c05ada116f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-21 16:16:16,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:16:16,824 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 16:16:16,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:16:16,862 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 16:16:16,862 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-21 16:16:16,863 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-21 16:16:16,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7341f15f-2d10-42c6-86f1-46c05ada116f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-21 16:16:17,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7341f15f-2d10-42c6-86f1-46c05ada116f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-21 16:16:17,069 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:16:17,073 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-21 16:16:17,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 04:16:17 BoogieIcfgContainer [2022-11-21 16:16:17,110 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-21 16:16:17,111 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-21 16:16:17,111 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-21 16:16:17,111 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-21 16:16:17,112 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:16:12" (3/4) ... [2022-11-21 16:16:17,113 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-21 16:16:17,162 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7341f15f-2d10-42c6-86f1-46c05ada116f/bin/uautomizer-vX5HgA9Q3a/witness.graphml [2022-11-21 16:16:17,162 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-21 16:16:17,163 INFO L158 Benchmark]: Toolchain (without parser) took 5592.81ms. Allocated memory is still 174.1MB. Free memory was 129.1MB in the beginning and 67.2MB in the end (delta: 61.9MB). Peak memory consumption was 63.4MB. Max. memory is 16.1GB. [2022-11-21 16:16:17,163 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 121.6MB. Free memory is still 65.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-21 16:16:17,164 INFO L158 Benchmark]: CACSL2BoogieTranslator took 344.13ms. Allocated memory is still 174.1MB. Free memory was 129.1MB in the beginning and 118.4MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-21 16:16:17,164 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.94ms. Allocated memory is still 174.1MB. Free memory was 118.4MB in the beginning and 116.5MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-21 16:16:17,164 INFO L158 Benchmark]: Boogie Preprocessor took 27.27ms. Allocated memory is still 174.1MB. Free memory was 116.5MB in the beginning and 115.5MB in the end (delta: 991.2kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-21 16:16:17,165 INFO L158 Benchmark]: RCFGBuilder took 350.67ms. Allocated memory is still 174.1MB. Free memory was 115.1MB in the beginning and 103.5MB in the end (delta: 11.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-21 16:16:17,165 INFO L158 Benchmark]: TraceAbstraction took 4770.58ms. Allocated memory is still 174.1MB. Free memory was 102.6MB in the beginning and 69.3MB in the end (delta: 33.3MB). Peak memory consumption was 36.1MB. Max. memory is 16.1GB. [2022-11-21 16:16:17,165 INFO L158 Benchmark]: Witness Printer took 51.72ms. Allocated memory is still 174.1MB. Free memory was 69.3MB in the beginning and 67.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-21 16:16:17,167 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 121.6MB. Free memory is still 65.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 344.13ms. Allocated memory is still 174.1MB. Free memory was 129.1MB in the beginning and 118.4MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 40.94ms. Allocated memory is still 174.1MB. Free memory was 118.4MB in the beginning and 116.5MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 27.27ms. Allocated memory is still 174.1MB. Free memory was 116.5MB in the beginning and 115.5MB in the end (delta: 991.2kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 350.67ms. Allocated memory is still 174.1MB. Free memory was 115.1MB in the beginning and 103.5MB in the end (delta: 11.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 4770.58ms. Allocated memory is still 174.1MB. Free memory was 102.6MB in the beginning and 69.3MB in the end (delta: 33.3MB). Peak memory consumption was 36.1MB. Max. memory is 16.1GB. * Witness Printer took 51.72ms. Allocated memory is still 174.1MB. Free memory was 69.3MB in the beginning and 67.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; VAL [N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L13] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, N=2] [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] a[0] = 1 [L32] b[0] = 1 [L33] i=1 VAL [a={-2:0}, b={-1:0}, i=1, N=2] [L33] COND TRUE i