./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array12_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-patterns/array12_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro --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 4cd544b9fc2c4c641198812054f6f7e3a4b46d14448acc5758393bf17818405b --- 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-8393723 [2022-11-18 20:45:34,914 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:45:34,920 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:45:34,959 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:45:34,961 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:45:34,966 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:45:34,967 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:45:34,971 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:45:34,973 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:45:34,976 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:45:34,978 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:45:34,980 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:45:34,981 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:45:34,986 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:45:34,987 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:45:34,988 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:45:34,989 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:45:34,990 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:45:34,991 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:45:34,993 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:45:34,994 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:45:34,996 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:45:34,997 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:45:34,998 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:45:35,001 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:45:35,001 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:45:35,002 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:45:35,002 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:45:35,003 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:45:35,004 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:45:35,004 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:45:35,005 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:45:35,006 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:45:35,007 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:45:35,008 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:45:35,008 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:45:35,009 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:45:35,010 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:45:35,010 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:45:35,011 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:45:35,012 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:45:35,013 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 20:45:35,032 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:45:35,033 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:45:35,033 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:45:35,034 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:45:35,034 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:45:35,034 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:45:35,035 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:45:35,035 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:45:35,036 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:45:35,036 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:45:35,036 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:45:35,037 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:45:35,037 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:45:35,037 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:45:35,037 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:45:35,038 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:45:35,038 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:45:35,038 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:45:35,038 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:45:35,039 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:45:35,039 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:45:35,039 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:45:35,040 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:45:35,040 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:45:35,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:45:35,040 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:45:35,041 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:45:35,041 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:45:35,041 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:45:35,042 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:45:35,042 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:45:35,042 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:45:35,042 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:45:35,043 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_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4cd544b9fc2c4c641198812054f6f7e3a4b46d14448acc5758393bf17818405b [2022-11-18 20:45:35,313 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:45:35,339 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:45:35,343 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:45:35,345 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:45:35,346 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:45:35,347 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/array-patterns/array12_pattern.c [2022-11-18 20:45:35,414 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/data/35aa2fe49/103617a265584c1293cc166df02595be/FLAGe6c365036 [2022-11-18 20:45:35,923 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:45:35,926 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/sv-benchmarks/c/array-patterns/array12_pattern.c [2022-11-18 20:45:35,935 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/data/35aa2fe49/103617a265584c1293cc166df02595be/FLAGe6c365036 [2022-11-18 20:45:36,275 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/data/35aa2fe49/103617a265584c1293cc166df02595be [2022-11-18 20:45:36,280 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:45:36,283 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:45:36,287 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:45:36,287 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:45:36,290 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:45:36,291 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:45:36" (1/1) ... [2022-11-18 20:45:36,293 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d9af0cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:45:36, skipping insertion in model container [2022-11-18 20:45:36,294 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:45:36" (1/1) ... [2022-11-18 20:45:36,301 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:45:36,317 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:45:36,558 WARN L234 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_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/sv-benchmarks/c/array-patterns/array12_pattern.c[1349,1362] [2022-11-18 20:45:36,604 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:45:36,611 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:45:36,625 WARN L234 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_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/sv-benchmarks/c/array-patterns/array12_pattern.c[1349,1362] [2022-11-18 20:45:36,636 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:45:36,649 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:45:36,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:45:36 WrapperNode [2022-11-18 20:45:36,649 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:45:36,651 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:45:36,651 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:45:36,651 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:45:36,658 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:45:36" (1/1) ... [2022-11-18 20:45:36,681 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:45:36" (1/1) ... [2022-11-18 20:45:36,698 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 90 [2022-11-18 20:45:36,698 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:45:36,699 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:45:36,699 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:45:36,699 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:45:36,708 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:45:36" (1/1) ... [2022-11-18 20:45:36,708 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:45:36" (1/1) ... [2022-11-18 20:45:36,710 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:45:36" (1/1) ... [2022-11-18 20:45:36,710 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:45:36" (1/1) ... [2022-11-18 20:45:36,715 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:45:36" (1/1) ... [2022-11-18 20:45:36,724 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:45:36" (1/1) ... [2022-11-18 20:45:36,730 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:45:36" (1/1) ... [2022-11-18 20:45:36,731 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:45:36" (1/1) ... [2022-11-18 20:45:36,733 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:45:36,733 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:45:36,734 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:45:36,734 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:45:36,735 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:45:36" (1/1) ... [2022-11-18 20:45:36,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:45:36,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:45:36,769 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:45:36,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:45:36,802 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:45:36,803 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-18 20:45:36,803 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-18 20:45:36,803 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 20:45:36,803 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 20:45:36,803 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 20:45:36,803 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:45:36,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:45:36,803 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 20:45:36,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 20:45:36,876 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:45:36,879 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:45:37,093 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:45:37,099 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:45:37,099 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-18 20:45:37,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:45:37 BoogieIcfgContainer [2022-11-18 20:45:37,101 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:45:37,103 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:45:37,103 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:45:37,107 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:45:37,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:45:36" (1/3) ... [2022-11-18 20:45:37,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@675a490d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:45:37, skipping insertion in model container [2022-11-18 20:45:37,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:45:36" (2/3) ... [2022-11-18 20:45:37,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@675a490d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:45:37, skipping insertion in model container [2022-11-18 20:45:37,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:45:37" (3/3) ... [2022-11-18 20:45:37,109 INFO L112 eAbstractionObserver]: Analyzing ICFG array12_pattern.c [2022-11-18 20:45:37,126 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:45:37,127 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 20:45:37,213 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:45:37,221 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;@35184f31, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:45:37,222 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 20:45:37,228 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 25 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:45:37,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 20:45:37,236 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:45:37,236 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:45:37,237 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:45:37,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:45:37,243 INFO L85 PathProgramCache]: Analyzing trace with hash -2136223091, now seen corresponding path program 1 times [2022-11-18 20:45:37,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:45:37,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412558106] [2022-11-18 20:45:37,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:37,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:45:37,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:37,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:45:37,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412558106] [2022-11-18 20:45:37,373 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-18 20:45:37,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839691207] [2022-11-18 20:45:37,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:37,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:45:37,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:45:37,381 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:45:37,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:45:37,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:37,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-18 20:45:37,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:45:37,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:45:37,516 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:45:37,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839691207] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:45:37,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:45:37,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:45:37,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127037062] [2022-11-18 20:45:37,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:45:37,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 20:45:37,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:45:37,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 20:45:37,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:45:37,566 INFO L87 Difference]: Start difference. First operand has 30 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 25 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-18 20:45:37,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:45:37,598 INFO L93 Difference]: Finished difference Result 57 states and 87 transitions. [2022-11-18 20:45:37,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 20:45:37,601 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-11-18 20:45:37,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:45:37,607 INFO L225 Difference]: With dead ends: 57 [2022-11-18 20:45:37,608 INFO L226 Difference]: Without dead ends: 26 [2022-11-18 20:45:37,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:45:37,613 INFO L413 NwaCegarLoop]: 36 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, 36 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 [2022-11-18 20:45:37,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:45:37,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-18 20:45:37,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-18 20:45:37,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:45:37,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2022-11-18 20:45:37,647 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 15 [2022-11-18 20:45:37,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:45:37,647 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2022-11-18 20:45:37,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-18 20:45:37,648 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2022-11-18 20:45:37,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-18 20:45:37,649 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:45:37,650 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:45:37,654 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-18 20:45:37,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:45:37,852 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:45:37,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:45:37,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1040942554, now seen corresponding path program 1 times [2022-11-18 20:45:37,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:45:37,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582988856] [2022-11-18 20:45:37,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:37,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:45:37,873 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:45:37,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2116136471] [2022-11-18 20:45:37,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:37,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:45:37,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:45:37,875 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:45:37,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:45:37,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:37,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 20:45:37,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:45:38,093 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:45:38,094 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:45:38,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:45:38,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582988856] [2022-11-18 20:45:38,094 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:45:38,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116136471] [2022-11-18 20:45:38,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116136471] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:45:38,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:45:38,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 20:45:38,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988021729] [2022-11-18 20:45:38,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:45:38,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:45:38,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:45:38,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:45:38,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:45:38,098 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-18 20:45:38,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:45:38,259 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2022-11-18 20:45:38,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:45:38,260 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2022-11-18 20:45:38,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:45:38,260 INFO L225 Difference]: With dead ends: 56 [2022-11-18 20:45:38,261 INFO L226 Difference]: Without dead ends: 38 [2022-11-18 20:45:38,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-18 20:45:38,262 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 46 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:45:38,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 49 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:45:38,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-18 20:45:38,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2022-11-18 20:45:38,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:45:38,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2022-11-18 20:45:38,271 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 27 [2022-11-18 20:45:38,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:45:38,271 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2022-11-18 20:45:38,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-18 20:45:38,271 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2022-11-18 20:45:38,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-18 20:45:38,272 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:45:38,272 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:45:38,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 20:45:38,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:45:38,478 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:45:38,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:45:38,479 INFO L85 PathProgramCache]: Analyzing trace with hash -66078307, now seen corresponding path program 1 times [2022-11-18 20:45:38,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:45:38,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218319968] [2022-11-18 20:45:38,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:38,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:45:38,494 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:45:38,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [994077480] [2022-11-18 20:45:38,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:38,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:45:38,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:45:38,496 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:45:38,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:45:38,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:38,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 20:45:38,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:45:38,638 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:45:38,638 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:45:38,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:45:38,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218319968] [2022-11-18 20:45:38,639 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:45:38,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994077480] [2022-11-18 20:45:38,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994077480] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:45:38,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:45:38,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:45:38,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426722301] [2022-11-18 20:45:38,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:45:38,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:45:38,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:45:38,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:45:38,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:45:38,645 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-18 20:45:38,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:45:38,703 INFO L93 Difference]: Finished difference Result 59 states and 71 transitions. [2022-11-18 20:45:38,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:45:38,703 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2022-11-18 20:45:38,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:45:38,704 INFO L225 Difference]: With dead ends: 59 [2022-11-18 20:45:38,704 INFO L226 Difference]: Without dead ends: 36 [2022-11-18 20:45:38,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:45:38,706 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 23 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:45:38,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 45 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:45:38,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-18 20:45:38,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2022-11-18 20:45:38,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:45:38,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2022-11-18 20:45:38,715 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 33 [2022-11-18 20:45:38,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:45:38,716 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2022-11-18 20:45:38,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-18 20:45:38,716 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2022-11-18 20:45:38,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-18 20:45:38,717 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:45:38,717 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:45:38,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:45:38,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:45:38,923 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:45:38,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:45:38,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1831364287, now seen corresponding path program 1 times [2022-11-18 20:45:38,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:45:38,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041689402] [2022-11-18 20:45:38,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:38,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:45:38,940 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:45:38,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [618566277] [2022-11-18 20:45:38,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:38,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:45:38,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:45:38,942 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:45:38,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:45:39,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:39,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-18 20:45:39,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:45:39,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-18 20:45:39,794 INFO L321 Elim1Store]: treesize reduction 158, result has 0.6 percent of original size [2022-11-18 20:45:39,795 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 2 case distinctions, treesize of input 40 treesize of output 20 [2022-11-18 20:45:40,133 INFO L321 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-11-18 20:45:40,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2022-11-18 20:45:40,221 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:45:40,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:45:40,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:45:40,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041689402] [2022-11-18 20:45:40,673 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:45:40,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618566277] [2022-11-18 20:45:40,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618566277] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:45:40,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:45:40,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-11-18 20:45:40,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505747052] [2022-11-18 20:45:40,674 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 20:45:40,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-18 20:45:40,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:45:40,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-18 20:45:40,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2022-11-18 20:45:40,677 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 21 states, 20 states have (on average 1.4) internal successors, (28), 17 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:45:41,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:45:41,138 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2022-11-18 20:45:41,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-18 20:45:41,140 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.4) internal successors, (28), 17 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 37 [2022-11-18 20:45:41,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:45:41,143 INFO L225 Difference]: With dead ends: 72 [2022-11-18 20:45:41,143 INFO L226 Difference]: Without dead ends: 68 [2022-11-18 20:45:41,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=201, Invalid=921, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 20:45:41,144 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 35 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:45:41,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 169 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 196 Invalid, 0 Unknown, 76 Unchecked, 0.2s Time] [2022-11-18 20:45:41,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-18 20:45:41,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2022-11-18 20:45:41,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 48 states have internal predecessors, (58), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-18 20:45:41,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2022-11-18 20:45:41,179 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 37 [2022-11-18 20:45:41,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:45:41,179 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2022-11-18 20:45:41,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.4) internal successors, (28), 17 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:45:41,181 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2022-11-18 20:45:41,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-18 20:45:41,185 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:45:41,185 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:45:41,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:45:41,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:45:41,391 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:45:41,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:45:41,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1155769123, now seen corresponding path program 2 times [2022-11-18 20:45:41,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:45:41,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65740622] [2022-11-18 20:45:41,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:41,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:45:41,415 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:45:41,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [20829142] [2022-11-18 20:45:41,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:45:41,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:45:41,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:45:41,421 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:45:41,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 20:45:41,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:45:41,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:45:41,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 20:45:41,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:45:41,570 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:45:41,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:45:41,632 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 20:45:41,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:45:41,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65740622] [2022-11-18 20:45:41,633 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:45:41,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20829142] [2022-11-18 20:45:41,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20829142] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:45:41,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:45:41,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-18 20:45:41,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704521475] [2022-11-18 20:45:41,634 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:45:41,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 20:45:41,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:45:41,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 20:45:41,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-18 20:45:41,637 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 20:45:41,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:45:41,838 INFO L93 Difference]: Finished difference Result 157 states and 193 transitions. [2022-11-18 20:45:41,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:45:41,839 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-11-18 20:45:41,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:45:41,841 INFO L225 Difference]: With dead ends: 157 [2022-11-18 20:45:41,841 INFO L226 Difference]: Without dead ends: 112 [2022-11-18 20:45:41,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:45:41,842 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 102 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:45:41,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 118 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:45:41,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-18 20:45:41,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 82. [2022-11-18 20:45:41,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 70 states have (on average 1.1857142857142857) internal successors, (83), 70 states have internal predecessors, (83), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-18 20:45:41,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 97 transitions. [2022-11-18 20:45:41,864 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 97 transitions. Word has length 39 [2022-11-18 20:45:41,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:45:41,865 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 97 transitions. [2022-11-18 20:45:41,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 20:45:41,865 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 97 transitions. [2022-11-18 20:45:41,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-18 20:45:41,866 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:45:41,866 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:45:41,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 20:45:42,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:45:42,072 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:45:42,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:45:42,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1584262531, now seen corresponding path program 3 times [2022-11-18 20:45:42,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:45:42,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815987339] [2022-11-18 20:45:42,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:42,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:45:42,098 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:45:42,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1151340250] [2022-11-18 20:45:42,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:45:42,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:45:42,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:45:42,105 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:45:42,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 20:45:42,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-18 20:45:42,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:45:42,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-18 20:45:42,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:45:42,484 INFO L321 Elim1Store]: treesize reduction 38, result has 48.6 percent of original size [2022-11-18 20:45:42,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 53 [2022-11-18 20:45:42,713 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:45:42,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-11-18 20:45:42,986 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:45:42,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:45:43,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2022-11-18 20:45:43,269 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 104 treesize of output 102 [2022-11-18 20:45:43,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2022-11-18 20:45:43,309 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 104 treesize of output 102 [2022-11-18 20:45:44,008 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-18 20:45:44,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:45:44,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815987339] [2022-11-18 20:45:44,009 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:45:44,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151340250] [2022-11-18 20:45:44,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151340250] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:45:44,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:45:44,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2022-11-18 20:45:44,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057028065] [2022-11-18 20:45:44,010 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:45:44,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-18 20:45:44,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:45:44,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-18 20:45:44,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2022-11-18 20:45:44,012 INFO L87 Difference]: Start difference. First operand 82 states and 97 transitions. Second operand has 30 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 25 states have internal predecessors, (57), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-18 20:45:46,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-18 20:45:48,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-18 20:45:49,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:45:49,669 INFO L93 Difference]: Finished difference Result 115 states and 132 transitions. [2022-11-18 20:45:49,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-18 20:45:49,671 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 25 states have internal predecessors, (57), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 39 [2022-11-18 20:45:49,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:45:49,672 INFO L225 Difference]: With dead ends: 115 [2022-11-18 20:45:49,672 INFO L226 Difference]: Without dead ends: 111 [2022-11-18 20:45:49,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=286, Invalid=1436, Unknown=0, NotChecked=0, Total=1722 [2022-11-18 20:45:49,674 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 55 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 21 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:45:49,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 176 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 212 Invalid, 2 Unknown, 80 Unchecked, 5.0s Time] [2022-11-18 20:45:49,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-18 20:45:49,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 75. [2022-11-18 20:45:49,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 64 states have (on average 1.171875) internal successors, (75), 64 states have internal predecessors, (75), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-18 20:45:49,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2022-11-18 20:45:49,701 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 39 [2022-11-18 20:45:49,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:45:49,701 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2022-11-18 20:45:49,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 25 states have internal predecessors, (57), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-18 20:45:49,701 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2022-11-18 20:45:49,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-18 20:45:49,702 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:45:49,702 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:45:49,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:45:49,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-18 20:45:49,903 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:45:49,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:45:49,903 INFO L85 PathProgramCache]: Analyzing trace with hash -2076840219, now seen corresponding path program 4 times [2022-11-18 20:45:49,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:45:49,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770061336] [2022-11-18 20:45:49,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:49,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:45:49,928 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:45:49,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1260884109] [2022-11-18 20:45:49,928 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:45:49,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:45:49,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:45:49,930 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:45:49,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 20:45:50,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:45:50,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:45:50,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 20:45:50,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:45:50,098 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 20:45:50,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:45:50,165 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-18 20:45:50,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:45:50,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770061336] [2022-11-18 20:45:50,166 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:45:50,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260884109] [2022-11-18 20:45:50,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260884109] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:45:50,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:45:50,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-18 20:45:50,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875184523] [2022-11-18 20:45:50,167 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:45:50,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 20:45:50,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:45:50,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 20:45:50,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-18 20:45:50,169 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 20:45:50,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:45:50,454 INFO L93 Difference]: Finished difference Result 130 states and 146 transitions. [2022-11-18 20:45:50,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 20:45:50,454 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2022-11-18 20:45:50,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:45:50,455 INFO L225 Difference]: With dead ends: 130 [2022-11-18 20:45:50,456 INFO L226 Difference]: Without dead ends: 126 [2022-11-18 20:45:50,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:45:50,457 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 47 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:45:50,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 143 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:45:50,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-18 20:45:50,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 79. [2022-11-18 20:45:50,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 68 states have (on average 1.1764705882352942) internal successors, (80), 68 states have internal predecessors, (80), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-18 20:45:50,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2022-11-18 20:45:50,491 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 41 [2022-11-18 20:45:50,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:45:50,495 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2022-11-18 20:45:50,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 20:45:50,496 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2022-11-18 20:45:50,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-18 20:45:50,502 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:45:50,502 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:45:50,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 20:45:50,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-18 20:45:50,708 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:45:50,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:45:50,708 INFO L85 PathProgramCache]: Analyzing trace with hash -624697650, now seen corresponding path program 5 times [2022-11-18 20:45:50,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:45:50,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492537281] [2022-11-18 20:45:50,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:50,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:45:50,720 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:45:50,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1999440971] [2022-11-18 20:45:50,721 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:45:50,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:45:50,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:45:50,722 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:45:50,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 20:45:50,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-18 20:45:50,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:45:50,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 20:45:50,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:45:50,908 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:45:50,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:45:50,964 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-18 20:45:50,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:45:50,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492537281] [2022-11-18 20:45:50,965 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:45:50,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999440971] [2022-11-18 20:45:50,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999440971] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:45:50,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:45:50,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-18 20:45:50,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172318387] [2022-11-18 20:45:50,966 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:45:50,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 20:45:50,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:45:50,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 20:45:50,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-18 20:45:50,969 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 20:45:51,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:45:51,181 INFO L93 Difference]: Finished difference Result 97 states and 107 transitions. [2022-11-18 20:45:51,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 20:45:51,182 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2022-11-18 20:45:51,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:45:51,182 INFO L225 Difference]: With dead ends: 97 [2022-11-18 20:45:51,182 INFO L226 Difference]: Without dead ends: 63 [2022-11-18 20:45:51,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-11-18 20:45:51,184 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 66 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:45:51,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 100 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:45:51,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-18 20:45:51,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2022-11-18 20:45:51,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 49 states have (on average 1.183673469387755) internal successors, (58), 49 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:45:51,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2022-11-18 20:45:51,196 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 42 [2022-11-18 20:45:51,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:45:51,197 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2022-11-18 20:45:51,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 20:45:51,197 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2022-11-18 20:45:51,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-18 20:45:51,198 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:45:51,198 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:45:51,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 20:45:51,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:45:51,404 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:45:51,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:45:51,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1532894260, now seen corresponding path program 6 times [2022-11-18 20:45:51,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:45:51,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493980211] [2022-11-18 20:45:51,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:51,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:45:51,415 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:45:51,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1999164074] [2022-11-18 20:45:51,416 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:45:51,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:45:51,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:45:51,417 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:45:51,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 20:45:51,525 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-18 20:45:51,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:45:51,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 20:45:51,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:45:51,576 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-18 20:45:51,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:45:51,621 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-18 20:45:51,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:45:51,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493980211] [2022-11-18 20:45:51,621 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:45:51,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999164074] [2022-11-18 20:45:51,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999164074] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:45:51,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:45:51,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-11-18 20:45:51,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712227233] [2022-11-18 20:45:51,622 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:45:51,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 20:45:51,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:45:51,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 20:45:51,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:45:51,623 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 20:45:51,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:45:51,738 INFO L93 Difference]: Finished difference Result 71 states and 79 transitions. [2022-11-18 20:45:51,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:45:51,739 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-11-18 20:45:51,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:45:51,739 INFO L225 Difference]: With dead ends: 71 [2022-11-18 20:45:51,739 INFO L226 Difference]: Without dead ends: 57 [2022-11-18 20:45:51,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:45:51,740 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 36 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:45:51,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 72 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:45:51,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-18 20:45:51,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2022-11-18 20:45:51,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 42 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:45:51,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2022-11-18 20:45:51,751 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 44 [2022-11-18 20:45:51,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:45:51,752 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2022-11-18 20:45:51,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 20:45:51,752 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2022-11-18 20:45:51,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-18 20:45:51,753 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:45:51,753 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:45:51,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 20:45:51,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-18 20:45:51,965 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:45:51,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:45:51,965 INFO L85 PathProgramCache]: Analyzing trace with hash -69369012, now seen corresponding path program 7 times [2022-11-18 20:45:51,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:45:51,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009735614] [2022-11-18 20:45:51,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:51,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:45:51,986 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:45:51,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1152382089] [2022-11-18 20:45:51,989 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:45:51,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:45:51,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:45:51,991 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:45:51,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 20:45:52,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:52,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 20:45:52,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:45:52,136 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-18 20:45:52,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:45:52,229 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-18 20:45:52,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:45:52,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009735614] [2022-11-18 20:45:52,229 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:45:52,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152382089] [2022-11-18 20:45:52,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152382089] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:45:52,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:45:52,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-11-18 20:45:52,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868438118] [2022-11-18 20:45:52,231 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:45:52,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 20:45:52,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:45:52,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 20:45:52,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-18 20:45:52,232 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 20:45:52,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:45:52,422 INFO L93 Difference]: Finished difference Result 101 states and 113 transitions. [2022-11-18 20:45:52,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 20:45:52,422 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 48 [2022-11-18 20:45:52,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:45:52,423 INFO L225 Difference]: With dead ends: 101 [2022-11-18 20:45:52,423 INFO L226 Difference]: Without dead ends: 68 [2022-11-18 20:45:52,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2022-11-18 20:45:52,425 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 51 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:45:52,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 95 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:45:52,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-18 20:45:52,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 56. [2022-11-18 20:45:52,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:45:52,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2022-11-18 20:45:52,442 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 48 [2022-11-18 20:45:52,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:45:52,443 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2022-11-18 20:45:52,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 20:45:52,443 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2022-11-18 20:45:52,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-18 20:45:52,444 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:45:52,444 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:45:52,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 20:45:52,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:45:52,650 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:45:52,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:45:52,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1249277894, now seen corresponding path program 8 times [2022-11-18 20:45:52,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:45:52,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335735545] [2022-11-18 20:45:52,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:52,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:45:52,664 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:45:52,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1234823352] [2022-11-18 20:45:52,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:45:52,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:45:52,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:45:52,666 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:45:52,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 20:45:52,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:45:52,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:45:52,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 88 conjunts are in the unsatisfiable core [2022-11-18 20:45:52,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:45:53,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-18 20:45:53,224 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 38 treesize of output 37 [2022-11-18 20:45:53,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:45:53,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:45:53,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:45:53,513 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:45:53,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-11-18 20:45:53,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:45:53,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:45:53,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:45:53,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:45:53,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:45:53,696 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:45:53,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 49 [2022-11-18 20:45:54,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:45:54,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:45:54,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:45:54,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:45:54,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:45:54,786 INFO L321 Elim1Store]: treesize reduction 315, result has 33.1 percent of original size [2022-11-18 20:45:54,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 11 case distinctions, treesize of input 72 treesize of output 184 [2022-11-18 20:45:59,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:45:59,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:45:59,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:45:59,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:46:03,642 INFO L321 Elim1Store]: treesize reduction 583, result has 21.6 percent of original size [2022-11-18 20:46:03,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 6 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 271 treesize of output 256 [2022-11-18 20:46:13,210 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:46:13,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:46:18,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:46:18,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335735545] [2022-11-18 20:46:18,232 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:46:18,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234823352] [2022-11-18 20:46:18,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234823352] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:46:18,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:46:18,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2022-11-18 20:46:18,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870267031] [2022-11-18 20:46:18,234 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 20:46:18,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-18 20:46:18,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:46:18,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-18 20:46:18,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=2095, Unknown=0, NotChecked=0, Total=2352 [2022-11-18 20:46:18,236 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand has 35 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 31 states have internal predecessors, (46), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:46:19,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:46:19,156 INFO L93 Difference]: Finished difference Result 123 states and 139 transitions. [2022-11-18 20:46:19,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-18 20:46:19,157 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 31 states have internal predecessors, (46), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 55 [2022-11-18 20:46:19,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:46:19,158 INFO L225 Difference]: With dead ends: 123 [2022-11-18 20:46:19,158 INFO L226 Difference]: Without dead ends: 119 [2022-11-18 20:46:19,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=314, Invalid=2656, Unknown=0, NotChecked=0, Total=2970 [2022-11-18 20:46:19,160 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 69 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 310 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:46:19,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 180 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 308 Invalid, 0 Unknown, 310 Unchecked, 0.4s Time] [2022-11-18 20:46:19,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-18 20:46:19,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 94. [2022-11-18 20:46:19,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 83 states have (on average 1.1566265060240963) internal successors, (96), 83 states have internal predecessors, (96), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-18 20:46:19,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 106 transitions. [2022-11-18 20:46:19,206 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 106 transitions. Word has length 55 [2022-11-18 20:46:19,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:46:19,207 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 106 transitions. [2022-11-18 20:46:19,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 31 states have internal predecessors, (46), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:46:19,207 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 106 transitions. [2022-11-18 20:46:19,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-18 20:46:19,208 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:46:19,208 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:46:19,219 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-18 20:46:19,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:46:19,414 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:46:19,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:46:19,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1328435676, now seen corresponding path program 9 times [2022-11-18 20:46:19,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:46:19,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400482534] [2022-11-18 20:46:19,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:46:19,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:46:19,442 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:46:19,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1559305739] [2022-11-18 20:46:19,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:46:19,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:46:19,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:46:19,448 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:46:19,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 20:46:19,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-18 20:46:19,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:46:19,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 20:46:19,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:46:19,727 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 13 proven. 22 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-18 20:46:19,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:46:19,800 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 8 proven. 27 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-18 20:46:19,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:46:19,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400482534] [2022-11-18 20:46:19,801 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:46:19,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559305739] [2022-11-18 20:46:19,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559305739] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:46:19,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:46:19,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-18 20:46:19,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872542971] [2022-11-18 20:46:19,802 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:46:19,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:46:19,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:46:19,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:46:19,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:46:19,804 INFO L87 Difference]: Start difference. First operand 94 states and 106 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 20:46:20,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:46:20,181 INFO L93 Difference]: Finished difference Result 183 states and 208 transitions. [2022-11-18 20:46:20,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 20:46:20,181 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 57 [2022-11-18 20:46:20,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:46:20,182 INFO L225 Difference]: With dead ends: 183 [2022-11-18 20:46:20,182 INFO L226 Difference]: Without dead ends: 143 [2022-11-18 20:46:20,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 105 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2022-11-18 20:46:20,184 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 90 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:46:20,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 173 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:46:20,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-11-18 20:46:20,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 136. [2022-11-18 20:46:20,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 121 states have (on average 1.1570247933884297) internal successors, (140), 121 states have internal predecessors, (140), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-18 20:46:20,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 154 transitions. [2022-11-18 20:46:20,220 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 154 transitions. Word has length 57 [2022-11-18 20:46:20,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:46:20,221 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 154 transitions. [2022-11-18 20:46:20,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 20:46:20,221 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 154 transitions. [2022-11-18 20:46:20,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-18 20:46:20,222 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:46:20,222 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:46:20,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 20:46:20,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-18 20:46:20,428 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:46:20,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:46:20,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1874529176, now seen corresponding path program 10 times [2022-11-18 20:46:20,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:46:20,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85347639] [2022-11-18 20:46:20,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:46:20,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:46:20,443 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:46:20,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [78825622] [2022-11-18 20:46:20,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:46:20,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:46:20,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:46:20,449 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:46:20,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 20:46:20,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:46:20,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:46:20,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 20:46:20,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:46:20,644 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 40 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 20:46:20,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:46:20,731 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 19 proven. 30 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-18 20:46:20,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:46:20,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85347639] [2022-11-18 20:46:20,731 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:46:20,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78825622] [2022-11-18 20:46:20,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78825622] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:46:20,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:46:20,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-18 20:46:20,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088942272] [2022-11-18 20:46:20,732 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:46:20,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:46:20,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:46:20,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:46:20,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:46:20,733 INFO L87 Difference]: Start difference. First operand 136 states and 154 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 20:46:21,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:46:21,125 INFO L93 Difference]: Finished difference Result 190 states and 212 transitions. [2022-11-18 20:46:21,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 20:46:21,125 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2022-11-18 20:46:21,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:46:21,128 INFO L225 Difference]: With dead ends: 190 [2022-11-18 20:46:21,128 INFO L226 Difference]: Without dead ends: 144 [2022-11-18 20:46:21,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 98 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-11-18 20:46:21,129 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 79 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:46:21,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 137 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:46:21,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-11-18 20:46:21,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 130. [2022-11-18 20:46:21,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 115 states have (on average 1.1130434782608696) internal successors, (128), 115 states have internal predecessors, (128), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-18 20:46:21,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 142 transitions. [2022-11-18 20:46:21,173 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 142 transitions. Word has length 57 [2022-11-18 20:46:21,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:46:21,173 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 142 transitions. [2022-11-18 20:46:21,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 20:46:21,174 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 142 transitions. [2022-11-18 20:46:21,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-18 20:46:21,174 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:46:21,175 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:46:21,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 20:46:21,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-18 20:46:21,394 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:46:21,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:46:21,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1705219253, now seen corresponding path program 11 times [2022-11-18 20:46:21,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:46:21,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715408411] [2022-11-18 20:46:21,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:46:21,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:46:21,405 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:46:21,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1093718671] [2022-11-18 20:46:21,406 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:46:21,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:46:21,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:46:21,407 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:46:21,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 20:46:21,527 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-11-18 20:46:21,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:46:21,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 20:46:21,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:46:21,612 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 48 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 20:46:21,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:46:21,685 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 32 proven. 20 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 20:46:21,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:46:21,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715408411] [2022-11-18 20:46:21,685 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:46:21,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093718671] [2022-11-18 20:46:21,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093718671] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:46:21,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:46:21,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-11-18 20:46:21,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607747050] [2022-11-18 20:46:21,686 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:46:21,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:46:21,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:46:21,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:46:21,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:46:21,687 INFO L87 Difference]: Start difference. First operand 130 states and 142 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 20:46:21,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:46:21,984 INFO L93 Difference]: Finished difference Result 177 states and 189 transitions. [2022-11-18 20:46:21,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 20:46:21,984 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 62 [2022-11-18 20:46:21,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:46:21,985 INFO L225 Difference]: With dead ends: 177 [2022-11-18 20:46:21,986 INFO L226 Difference]: Without dead ends: 121 [2022-11-18 20:46:21,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2022-11-18 20:46:21,987 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 123 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:46:21,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 110 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:46:21,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-18 20:46:22,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 115. [2022-11-18 20:46:22,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 100 states have (on average 1.09) internal successors, (109), 100 states have internal predecessors, (109), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-18 20:46:22,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 123 transitions. [2022-11-18 20:46:22,012 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 123 transitions. Word has length 62 [2022-11-18 20:46:22,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:46:22,012 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 123 transitions. [2022-11-18 20:46:22,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 20:46:22,013 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 123 transitions. [2022-11-18 20:46:22,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-18 20:46:22,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:46:22,014 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:46:22,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 20:46:22,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:46:22,220 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:46:22,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:46:22,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1763746438, now seen corresponding path program 12 times [2022-11-18 20:46:22,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:46:22,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602200602] [2022-11-18 20:46:22,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:46:22,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:46:22,231 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:46:22,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [215338281] [2022-11-18 20:46:22,232 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:46:22,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:46:22,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:46:22,233 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:46:22,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 20:46:22,401 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-11-18 20:46:22,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:46:22,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 20:46:22,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:46:22,503 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-11-18 20:46:22,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:46:22,607 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-11-18 20:46:22,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:46:22,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602200602] [2022-11-18 20:46:22,607 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:46:22,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215338281] [2022-11-18 20:46:22,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215338281] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:46:22,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:46:22,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-11-18 20:46:22,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788990232] [2022-11-18 20:46:22,608 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:46:22,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 20:46:22,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:46:22,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 20:46:22,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-11-18 20:46:22,610 INFO L87 Difference]: Start difference. First operand 115 states and 123 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 20:46:22,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:46:22,941 INFO L93 Difference]: Finished difference Result 186 states and 203 transitions. [2022-11-18 20:46:22,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 20:46:22,942 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 63 [2022-11-18 20:46:22,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:46:22,943 INFO L225 Difference]: With dead ends: 186 [2022-11-18 20:46:22,943 INFO L226 Difference]: Without dead ends: 149 [2022-11-18 20:46:22,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=172, Invalid=530, Unknown=0, NotChecked=0, Total=702 [2022-11-18 20:46:22,945 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 105 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:46:22,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 107 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:46:22,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-11-18 20:46:22,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 133. [2022-11-18 20:46:22,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 118 states have (on average 1.0932203389830508) internal successors, (129), 118 states have internal predecessors, (129), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-18 20:46:22,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 143 transitions. [2022-11-18 20:46:22,974 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 143 transitions. Word has length 63 [2022-11-18 20:46:22,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:46:22,974 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 143 transitions. [2022-11-18 20:46:22,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 20:46:22,974 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 143 transitions. [2022-11-18 20:46:22,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-18 20:46:22,975 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:46:22,975 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:46:22,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-18 20:46:23,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:46:23,180 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:46:23,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:46:23,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1511383042, now seen corresponding path program 1 times [2022-11-18 20:46:23,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:46:23,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687438938] [2022-11-18 20:46:23,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:46:23,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:46:23,192 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:46:23,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2112336837] [2022-11-18 20:46:23,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:46:23,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:46:23,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:46:23,194 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:46:23,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cceb351-f5ce-47b3-a3c2-dac7fbf1448a/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 20:46:24,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:24,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 102 conjunts are in the unsatisfiable core [2022-11-18 20:46:24,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:46:24,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-18 20:46:24,315 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 38 treesize of output 37 [2022-11-18 20:46:24,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:46:24,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:46:24,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:46:24,607 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:46:24,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-11-18 20:46:24,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:46:24,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:46:24,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:46:24,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:46:24,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:46:24,764 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:46:24,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 49 [2022-11-18 20:46:25,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:46:25,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:46:25,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:46:25,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:46:25,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:46:25,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:46:25,792 INFO L321 Elim1Store]: treesize reduction 329, result has 32.3 percent of original size [2022-11-18 20:46:25,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 11 case distinctions, treesize of input 77 treesize of output 187 [2022-11-18 20:46:30,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:46:30,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:46:30,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:46:30,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:46:30,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:46:37,071 WARN L233 SmtUtils]: Spent 6.11s on a formula simplification. DAG size of input: 348 DAG size of output: 152 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-18 20:46:37,074 INFO L321 Elim1Store]: treesize reduction 1703, result has 23.5 percent of original size [2022-11-18 20:46:37,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 7 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 56 case distinctions, treesize of input 289 treesize of output 627 [2022-11-18 20:55:55,029 WARN L233 SmtUtils]: Spent 3.78m on a formula simplification. DAG size of input: 920 DAG size of output: 157 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:56:13,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:56:13,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:56:13,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:56:13,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:57:22,830 WARN L233 SmtUtils]: Spent 1.15m on a formula simplification. DAG size of input: 769 DAG size of output: 233 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-18 20:57:22,832 INFO L321 Elim1Store]: treesize reduction 3390, result has 17.3 percent of original size [2022-11-18 20:57:22,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 22 select indices, 22 select index equivalence classes, 6 disjoint index pairs (out of 231 index pairs), introduced 22 new quantified variables, introduced 231 case distinctions, treesize of input 807 treesize of output 1041