./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa --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 a077c1334c11d8329da2d0c58ca917b2036581fa7e949d1d304e3346ec54a811 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 20:11:02,157 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 20:11:02,159 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 20:11:02,181 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 20:11:02,181 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 20:11:02,182 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 20:11:02,183 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 20:11:02,185 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 20:11:02,187 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 20:11:02,187 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 20:11:02,188 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 20:11:02,189 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 20:11:02,190 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 20:11:02,190 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 20:11:02,192 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 20:11:02,193 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 20:11:02,193 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 20:11:02,194 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 20:11:02,196 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 20:11:02,197 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 20:11:02,199 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 20:11:02,200 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 20:11:02,201 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 20:11:02,202 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 20:11:02,204 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 20:11:02,205 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 20:11:02,205 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 20:11:02,206 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 20:11:02,206 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 20:11:02,207 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 20:11:02,207 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 20:11:02,208 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 20:11:02,209 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 20:11:02,209 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 20:11:02,210 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 20:11:02,210 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 20:11:02,210 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 20:11:02,211 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 20:11:02,211 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 20:11:02,211 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 20:11:02,212 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 20:11:02,212 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 20:11:02,230 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 20:11:02,230 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 20:11:02,230 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 20:11:02,230 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 20:11:02,231 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 20:11:02,231 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 20:11:02,231 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 20:11:02,231 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 20:11:02,231 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 20:11:02,232 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 20:11:02,232 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 20:11:02,232 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 20:11:02,232 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 20:11:02,232 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 20:11:02,232 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 20:11:02,232 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 20:11:02,232 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 20:11:02,232 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 20:11:02,233 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 20:11:02,233 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 20:11:02,233 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 20:11:02,233 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 20:11:02,233 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 20:11:02,233 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 20:11:02,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:11:02,233 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 20:11:02,233 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 20:11:02,234 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 20:11:02,234 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 20:11:02,234 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 20:11:02,234 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 20:11:02,234 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 20:11:02,234 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 20:11:02,234 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 20:11:02,234 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_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a077c1334c11d8329da2d0c58ca917b2036581fa7e949d1d304e3346ec54a811 [2021-12-06 20:11:02,413 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 20:11:02,428 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 20:11:02,430 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 20:11:02,431 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 20:11:02,431 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 20:11:02,432 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound5.c [2021-12-06 20:11:02,473 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/data/cb2b27e4e/42c123d7327f40778fe7a451f70a8ee2/FLAGc94d4bc37 [2021-12-06 20:11:02,828 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 20:11:02,829 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound5.c [2021-12-06 20:11:02,833 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/data/cb2b27e4e/42c123d7327f40778fe7a451f70a8ee2/FLAGc94d4bc37 [2021-12-06 20:11:02,842 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/data/cb2b27e4e/42c123d7327f40778fe7a451f70a8ee2 [2021-12-06 20:11:02,844 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 20:11:02,845 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 20:11:02,846 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 20:11:02,846 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 20:11:02,848 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 20:11:02,849 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:11:02" (1/1) ... [2021-12-06 20:11:02,850 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7140444 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:11:02, skipping insertion in model container [2021-12-06 20:11:02,850 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:11:02" (1/1) ... [2021-12-06 20:11:02,854 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 20:11:02,864 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 20:11:02,979 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound5.c[526,539] [2021-12-06 20:11:02,991 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:11:02,999 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 20:11:03,012 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound5.c[526,539] [2021-12-06 20:11:03,018 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:11:03,032 INFO L208 MainTranslator]: Completed translation [2021-12-06 20:11:03,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:11:03 WrapperNode [2021-12-06 20:11:03,033 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 20:11:03,034 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 20:11:03,034 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 20:11:03,034 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 20:11:03,042 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:11:03" (1/1) ... [2021-12-06 20:11:03,049 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:11:03" (1/1) ... [2021-12-06 20:11:03,068 INFO L137 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 56 [2021-12-06 20:11:03,068 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 20:11:03,069 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 20:11:03,069 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 20:11:03,069 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 20:11:03,077 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:11:03" (1/1) ... [2021-12-06 20:11:03,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:11:03" (1/1) ... [2021-12-06 20:11:03,079 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:11:03" (1/1) ... [2021-12-06 20:11:03,079 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:11:03" (1/1) ... [2021-12-06 20:11:03,083 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:11:03" (1/1) ... [2021-12-06 20:11:03,087 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:11:03" (1/1) ... [2021-12-06 20:11:03,088 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:11:03" (1/1) ... [2021-12-06 20:11:03,090 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 20:11:03,091 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 20:11:03,092 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 20:11:03,092 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 20:11:03,093 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:11:03" (1/1) ... [2021-12-06 20:11:03,101 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:11:03,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:11:03,124 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 20:11:03,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 20:11:03,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 20:11:03,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 20:11:03,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 20:11:03,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 20:11:03,159 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-06 20:11:03,159 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-06 20:11:03,201 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 20:11:03,202 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 20:11:03,276 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 20:11:03,281 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 20:11:03,281 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 20:11:03,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:11:03 BoogieIcfgContainer [2021-12-06 20:11:03,282 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 20:11:03,283 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 20:11:03,284 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 20:11:03,286 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 20:11:03,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 08:11:02" (1/3) ... [2021-12-06 20:11:03,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@621a7e51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:11:03, skipping insertion in model container [2021-12-06 20:11:03,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:11:03" (2/3) ... [2021-12-06 20:11:03,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@621a7e51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:11:03, skipping insertion in model container [2021-12-06 20:11:03,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:11:03" (3/3) ... [2021-12-06 20:11:03,288 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_valuebound5.c [2021-12-06 20:11:03,293 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 20:11:03,293 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 20:11:03,329 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 20:11:03,334 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 20:11:03,334 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 20:11:03,347 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-06 20:11:03,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-06 20:11:03,350 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:11:03,350 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:11:03,351 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:11:03,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:11:03,355 INFO L85 PathProgramCache]: Analyzing trace with hash -586848446, now seen corresponding path program 1 times [2021-12-06 20:11:03,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:11:03,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445666449] [2021-12-06 20:11:03,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:11:03,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:11:03,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:11:03,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:11:03,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:11:03,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445666449] [2021-12-06 20:11:03,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445666449] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:11:03,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:11:03,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 20:11:03,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742761318] [2021-12-06 20:11:03,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:11:03,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 20:11:03,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:11:03,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 20:11:03,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 20:11:03,500 INFO L87 Difference]: Start difference. First operand has 26 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:11:03,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:11:03,517 INFO L93 Difference]: Finished difference Result 49 states and 83 transitions. [2021-12-06 20:11:03,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 20:11:03,520 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-06 20:11:03,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:11:03,526 INFO L225 Difference]: With dead ends: 49 [2021-12-06 20:11:03,527 INFO L226 Difference]: Without dead ends: 22 [2021-12-06 20:11:03,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 20:11:03,533 INFO L933 BasicCegarLoop]: 34 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, 34 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 [2021-12-06 20:11:03,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:11:03,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-06 20:11:03,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-12-06 20:11:03,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 20:11:03,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2021-12-06 20:11:03,567 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 9 [2021-12-06 20:11:03,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:11:03,567 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2021-12-06 20:11:03,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:11:03,568 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2021-12-06 20:11:03,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-06 20:11:03,569 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:11:03,569 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:11:03,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 20:11:03,569 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:11:03,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:11:03,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1188158916, now seen corresponding path program 1 times [2021-12-06 20:11:03,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:11:03,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259520768] [2021-12-06 20:11:03,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:11:03,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:11:03,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:11:03,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:11:03,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:11:03,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259520768] [2021-12-06 20:11:03,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259520768] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:11:03,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:11:03,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 20:11:03,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974073318] [2021-12-06 20:11:03,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:11:03,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 20:11:03,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:11:03,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 20:11:03,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:11:03,639 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:11:03,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:11:03,686 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2021-12-06 20:11:03,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 20:11:03,687 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-06 20:11:03,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:11:03,688 INFO L225 Difference]: With dead ends: 35 [2021-12-06 20:11:03,688 INFO L226 Difference]: Without dead ends: 33 [2021-12-06 20:11:03,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 20:11:03,691 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 12 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:11:03,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 98 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:11:03,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-06 20:11:03,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2021-12-06 20:11:03,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 20:11:03,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2021-12-06 20:11:03,704 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 9 [2021-12-06 20:11:03,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:11:03,704 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2021-12-06 20:11:03,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:11:03,704 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2021-12-06 20:11:03,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 20:11:03,705 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:11:03,705 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:11:03,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 20:11:03,706 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:11:03,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:11:03,707 INFO L85 PathProgramCache]: Analyzing trace with hash -697944935, now seen corresponding path program 1 times [2021-12-06 20:11:03,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:11:03,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945184002] [2021-12-06 20:11:03,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:11:03,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:11:03,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:11:03,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 20:11:03,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:11:03,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:11:03,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:11:03,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945184002] [2021-12-06 20:11:03,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945184002] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:11:03,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:11:03,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 20:11:03,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106604927] [2021-12-06 20:11:03,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:11:03,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 20:11:03,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:11:03,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 20:11:03,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:11:03,783 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 20:11:03,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:11:03,824 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2021-12-06 20:11:03,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 20:11:03,824 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-12-06 20:11:03,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:11:03,825 INFO L225 Difference]: With dead ends: 39 [2021-12-06 20:11:03,825 INFO L226 Difference]: Without dead ends: 37 [2021-12-06 20:11:03,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 20:11:03,827 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 10 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:11:03,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 94 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:11:03,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-06 20:11:03,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2021-12-06 20:11:03,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 20:11:03,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-12-06 20:11:03,834 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 14 [2021-12-06 20:11:03,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:11:03,834 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-12-06 20:11:03,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 20:11:03,835 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-12-06 20:11:03,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-06 20:11:03,835 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:11:03,835 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:11:03,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 20:11:03,836 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:11:03,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:11:03,836 INFO L85 PathProgramCache]: Analyzing trace with hash 262992548, now seen corresponding path program 1 times [2021-12-06 20:11:03,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:11:03,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340008948] [2021-12-06 20:11:03,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:11:03,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:11:03,854 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:11:03,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2112262011] [2021-12-06 20:11:03,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:11:03,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:11:03,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:11:03,856 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:11:03,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 20:11:03,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:11:03,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 20:11:03,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:11:04,001 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 20:11:04,001 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:11:04,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:11:04,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340008948] [2021-12-06 20:11:04,002 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:11:04,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112262011] [2021-12-06 20:11:04,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112262011] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:11:04,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:11:04,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 20:11:04,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208904261] [2021-12-06 20:11:04,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:11:04,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 20:11:04,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:11:04,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 20:11:04,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:11:04,005 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 20:11:04,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:11:04,054 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2021-12-06 20:11:04,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 20:11:04,055 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-12-06 20:11:04,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:11:04,056 INFO L225 Difference]: With dead ends: 58 [2021-12-06 20:11:04,056 INFO L226 Difference]: Without dead ends: 44 [2021-12-06 20:11:04,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 20:11:04,058 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 8 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:11:04,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 106 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:11:04,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-06 20:11:04,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-12-06 20:11:04,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-06 20:11:04,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2021-12-06 20:11:04,068 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 19 [2021-12-06 20:11:04,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:11:04,068 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2021-12-06 20:11:04,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 20:11:04,069 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2021-12-06 20:11:04,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-06 20:11:04,069 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:11:04,069 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:11:04,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 20:11:04,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:11:04,271 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:11:04,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:11:04,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1807142342, now seen corresponding path program 1 times [2021-12-06 20:11:04,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:11:04,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518838467] [2021-12-06 20:11:04,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:11:04,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:11:04,323 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:11:04,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1371488934] [2021-12-06 20:11:04,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:11:04,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:11:04,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:11:04,328 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:11:04,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 20:11:04,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:11:04,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 20:11:04,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:11:04,547 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 20:11:04,547 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:11:04,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:11:04,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518838467] [2021-12-06 20:11:04,547 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:11:04,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371488934] [2021-12-06 20:11:04,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371488934] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:11:04,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:11:04,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 20:11:04,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667022441] [2021-12-06 20:11:04,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:11:04,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 20:11:04,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:11:04,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 20:11:04,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:11:04,549 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 20:11:04,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:11:04,588 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2021-12-06 20:11:04,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 20:11:04,588 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2021-12-06 20:11:04,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:11:04,589 INFO L225 Difference]: With dead ends: 57 [2021-12-06 20:11:04,589 INFO L226 Difference]: Without dead ends: 50 [2021-12-06 20:11:04,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 20:11:04,590 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 9 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:11:04,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 80 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:11:04,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-06 20:11:04,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2021-12-06 20:11:04,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 30 states have (on average 1.2) internal successors, (36), 32 states have internal predecessors, (36), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-06 20:11:04,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2021-12-06 20:11:04,601 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 26 [2021-12-06 20:11:04,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:11:04,601 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2021-12-06 20:11:04,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 20:11:04,602 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2021-12-06 20:11:04,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-06 20:11:04,603 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:11:04,603 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:11:04,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 20:11:04,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:11:04,805 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:11:04,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:11:04,807 INFO L85 PathProgramCache]: Analyzing trace with hash -979933353, now seen corresponding path program 1 times [2021-12-06 20:11:04,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:11:04,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024946200] [2021-12-06 20:11:04,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:11:04,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:11:04,839 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:11:04,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2135382901] [2021-12-06 20:11:04,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:11:04,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:11:04,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:11:04,843 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:11:04,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 20:11:04,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:11:04,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 20:11:04,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:11:05,063 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-06 20:11:05,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:11:05,142 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-06 20:11:05,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:11:05,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024946200] [2021-12-06 20:11:05,143 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:11:05,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135382901] [2021-12-06 20:11:05,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135382901] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 20:11:05,143 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 20:11:05,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2021-12-06 20:11:05,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509606527] [2021-12-06 20:11:05,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:11:05,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 20:11:05,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:11:05,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 20:11:05,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:11:05,145 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 20:11:05,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:11:05,471 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2021-12-06 20:11:05,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 20:11:05,472 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2021-12-06 20:11:05,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:11:05,473 INFO L225 Difference]: With dead ends: 61 [2021-12-06 20:11:05,473 INFO L226 Difference]: Without dead ends: 59 [2021-12-06 20:11:05,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-06 20:11:05,474 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 8 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:11:05,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 90 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 20:11:05,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-06 20:11:05,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2021-12-06 20:11:05,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 37 states have internal predecessors, (40), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-06 20:11:05,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2021-12-06 20:11:05,482 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 36 [2021-12-06 20:11:05,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:11:05,483 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2021-12-06 20:11:05,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 20:11:05,483 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2021-12-06 20:11:05,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-06 20:11:05,484 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:11:05,484 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:11:05,503 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 20:11:05,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:11:05,686 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:11:05,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:11:05,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1034157389, now seen corresponding path program 1 times [2021-12-06 20:11:05,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:11:05,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871017442] [2021-12-06 20:11:05,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:11:05,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:11:05,700 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:11:05,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1953921676] [2021-12-06 20:11:05,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:11:05,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:11:05,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:11:05,701 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:11:05,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 20:11:05,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:11:05,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 20:11:05,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:11:05,964 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-12-06 20:11:05,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:11:06,880 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-12-06 20:11:06,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:11:06,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871017442] [2021-12-06 20:11:06,880 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:11:06,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953921676] [2021-12-06 20:11:06,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953921676] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:11:06,880 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:11:06,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-12-06 20:11:06,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657024903] [2021-12-06 20:11:06,881 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:11:06,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 20:11:06,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:11:06,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 20:11:06,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-06 20:11:06,882 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-12-06 20:11:15,773 WARN L227 SmtUtils]: Spent 8.80s on a formula simplification. DAG size of input: 48 DAG size of output: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 20:11:17,499 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:11:19,506 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:11:19,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:11:19,859 INFO L93 Difference]: Finished difference Result 146 states and 202 transitions. [2021-12-06 20:11:19,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 20:11:19,859 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 56 [2021-12-06 20:11:19,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:11:19,862 INFO L225 Difference]: With dead ends: 146 [2021-12-06 20:11:19,862 INFO L226 Difference]: Without dead ends: 117 [2021-12-06 20:11:19,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-12-06 20:11:19,863 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 34 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 68 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:11:19,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 234 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 224 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2021-12-06 20:11:19,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-12-06 20:11:19,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 105. [2021-12-06 20:11:19,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 64 states have (on average 1.234375) internal successors, (79), 68 states have internal predecessors, (79), 30 states have call successors, (30), 10 states have call predecessors, (30), 10 states have return successors, (29), 26 states have call predecessors, (29), 29 states have call successors, (29) [2021-12-06 20:11:19,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 138 transitions. [2021-12-06 20:11:19,886 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 138 transitions. Word has length 56 [2021-12-06 20:11:19,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:11:19,886 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 138 transitions. [2021-12-06 20:11:19,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-12-06 20:11:19,887 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 138 transitions. [2021-12-06 20:11:19,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-06 20:11:19,889 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:11:19,889 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:11:19,909 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 20:11:20,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:11:20,091 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:11:20,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:11:20,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1199454569, now seen corresponding path program 1 times [2021-12-06 20:11:20,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:11:20,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063160207] [2021-12-06 20:11:20,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:11:20,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:11:20,128 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:11:20,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1993683963] [2021-12-06 20:11:20,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:11:20,129 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:11:20,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:11:20,131 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:11:20,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 20:11:20,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:11:20,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-06 20:11:20,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:11:20,494 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 66 proven. 11 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-12-06 20:11:20,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:11:20,697 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-12-06 20:11:20,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:11:20,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063160207] [2021-12-06 20:11:20,697 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:11:20,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993683963] [2021-12-06 20:11:20,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993683963] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:11:20,698 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:11:20,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2021-12-06 20:11:20,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544578285] [2021-12-06 20:11:20,698 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:11:20,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 20:11:20,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:11:20,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 20:11:20,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-12-06 20:11:20,700 INFO L87 Difference]: Start difference. First operand 105 states and 138 transitions. Second operand has 16 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2021-12-06 20:11:21,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:11:21,103 INFO L93 Difference]: Finished difference Result 161 states and 211 transitions. [2021-12-06 20:11:21,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 20:11:21,104 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) Word has length 67 [2021-12-06 20:11:21,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:11:21,105 INFO L225 Difference]: With dead ends: 161 [2021-12-06 20:11:21,105 INFO L226 Difference]: Without dead ends: 107 [2021-12-06 20:11:21,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-12-06 20:11:21,107 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 35 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:11:21,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 241 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 20:11:21,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-06 20:11:21,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2021-12-06 20:11:21,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 61 states have internal predecessors, (68), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-06 20:11:21,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 113 transitions. [2021-12-06 20:11:21,124 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 113 transitions. Word has length 67 [2021-12-06 20:11:21,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:11:21,124 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 113 transitions. [2021-12-06 20:11:21,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2021-12-06 20:11:21,124 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 113 transitions. [2021-12-06 20:11:21,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-06 20:11:21,126 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:11:21,126 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:11:21,146 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 20:11:21,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-06 20:11:21,327 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:11:21,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:11:21,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1842513023, now seen corresponding path program 1 times [2021-12-06 20:11:21,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:11:21,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717858759] [2021-12-06 20:11:21,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:11:21,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:11:21,351 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:11:21,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [377716647] [2021-12-06 20:11:21,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:11:21,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:11:21,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:11:21,355 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:11:21,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 20:11:21,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:11:21,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 20:11:21,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:11:21,613 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-12-06 20:11:21,613 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:11:21,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:11:21,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717858759] [2021-12-06 20:11:21,614 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:11:21,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377716647] [2021-12-06 20:11:21,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377716647] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:11:21,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:11:21,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 20:11:21,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801712059] [2021-12-06 20:11:21,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:11:21,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 20:11:21,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:11:21,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 20:11:21,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:11:21,615 INFO L87 Difference]: Start difference. First operand 93 states and 113 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-06 20:11:21,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:11:21,658 INFO L93 Difference]: Finished difference Result 107 states and 128 transitions. [2021-12-06 20:11:21,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 20:11:21,659 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 76 [2021-12-06 20:11:21,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:11:21,660 INFO L225 Difference]: With dead ends: 107 [2021-12-06 20:11:21,660 INFO L226 Difference]: Without dead ends: 95 [2021-12-06 20:11:21,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:11:21,661 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 14 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:11:21,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 91 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:11:21,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-06 20:11:21,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-12-06 20:11:21,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 60 states have (on average 1.15) internal successors, (69), 61 states have internal predecessors, (69), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-06 20:11:21,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 114 transitions. [2021-12-06 20:11:21,671 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 114 transitions. Word has length 76 [2021-12-06 20:11:21,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:11:21,672 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 114 transitions. [2021-12-06 20:11:21,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-06 20:11:21,672 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 114 transitions. [2021-12-06 20:11:21,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-06 20:11:21,673 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:11:21,673 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:11:21,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 20:11:21,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-06 20:11:21,874 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:11:21,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:11:21,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1412721000, now seen corresponding path program 1 times [2021-12-06 20:11:21,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:11:21,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573024604] [2021-12-06 20:11:21,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:11:21,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:11:21,883 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:11:21,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2072939827] [2021-12-06 20:11:21,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:11:21,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:11:21,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:11:21,885 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:11:21,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 20:11:21,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:11:21,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 20:11:21,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:11:22,126 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2021-12-06 20:11:22,126 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:11:22,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:11:22,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573024604] [2021-12-06 20:11:22,126 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:11:22,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072939827] [2021-12-06 20:11:22,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072939827] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:11:22,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:11:22,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 20:11:22,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051576196] [2021-12-06 20:11:22,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:11:22,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 20:11:22,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:11:22,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 20:11:22,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-06 20:11:22,128 INFO L87 Difference]: Start difference. First operand 95 states and 114 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-06 20:11:22,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:11:22,202 INFO L93 Difference]: Finished difference Result 131 states and 159 transitions. [2021-12-06 20:11:22,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 20:11:22,202 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 86 [2021-12-06 20:11:22,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:11:22,204 INFO L225 Difference]: With dead ends: 131 [2021-12-06 20:11:22,204 INFO L226 Difference]: Without dead ends: 97 [2021-12-06 20:11:22,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:11:22,205 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 10 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:11:22,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 106 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:11:22,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-12-06 20:11:22,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2021-12-06 20:11:22,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 56 states have internal predecessors, (61), 19 states have call successors, (19), 11 states have call predecessors, (19), 11 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-06 20:11:22,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 98 transitions. [2021-12-06 20:11:22,222 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 98 transitions. Word has length 86 [2021-12-06 20:11:22,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:11:22,222 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 98 transitions. [2021-12-06 20:11:22,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-06 20:11:22,222 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 98 transitions. [2021-12-06 20:11:22,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-06 20:11:22,223 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:11:22,223 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:11:22,257 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 20:11:22,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:11:22,424 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:11:22,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:11:22,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1193302554, now seen corresponding path program 2 times [2021-12-06 20:11:22,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:11:22,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302584953] [2021-12-06 20:11:22,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:11:22,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:11:22,431 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:11:22,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1626760192] [2021-12-06 20:11:22,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:11:22,432 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:11:22,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:11:22,432 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:11:22,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 20:11:22,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:11:22,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:11:22,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-06 20:11:22,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:11:22,818 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-12-06 20:11:22,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:11:37,968 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-12-06 20:11:37,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:11:37,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302584953] [2021-12-06 20:11:37,968 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:11:37,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626760192] [2021-12-06 20:11:37,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626760192] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:11:37,968 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:11:37,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-12-06 20:11:37,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24237395] [2021-12-06 20:11:37,969 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:11:37,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 20:11:37,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:11:37,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 20:11:37,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-12-06 20:11:37,970 INFO L87 Difference]: Start difference. First operand 86 states and 98 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 12 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2021-12-06 20:12:05,272 WARN L227 SmtUtils]: Spent 23.41s on a formula simplification. DAG size of input: 186 DAG size of output: 114 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 20:12:06,766 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:12:09,338 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:12:25,128 WARN L227 SmtUtils]: Spent 10.57s on a formula simplification. DAG size of input: 65 DAG size of output: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 20:12:32,099 WARN L227 SmtUtils]: Spent 5.43s on a formula simplification. DAG size of input: 84 DAG size of output: 64 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 20:12:37,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:12:37,406 INFO L93 Difference]: Finished difference Result 214 states and 281 transitions. [2021-12-06 20:12:37,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 20:12:37,407 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 12 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) Word has length 86 [2021-12-06 20:12:37,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:12:37,409 INFO L225 Difference]: With dead ends: 214 [2021-12-06 20:12:37,409 INFO L226 Difference]: Without dead ends: 178 [2021-12-06 20:12:37,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 55.0s TimeCoverageRelationStatistics Valid=245, Invalid=625, Unknown=0, NotChecked=0, Total=870 [2021-12-06 20:12:37,410 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 109 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:12:37,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 415 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time] [2021-12-06 20:12:37,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-12-06 20:12:37,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 142. [2021-12-06 20:12:37,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 91 states have (on average 1.1758241758241759) internal successors, (107), 92 states have internal predecessors, (107), 34 states have call successors, (34), 16 states have call predecessors, (34), 16 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-06 20:12:37,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 174 transitions. [2021-12-06 20:12:37,442 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 174 transitions. Word has length 86 [2021-12-06 20:12:37,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:12:37,443 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 174 transitions. [2021-12-06 20:12:37,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 12 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2021-12-06 20:12:37,443 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 174 transitions. [2021-12-06 20:12:37,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-06 20:12:37,444 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:12:37,444 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:12:37,463 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 20:12:37,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:12:37,646 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:12:37,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:12:37,647 INFO L85 PathProgramCache]: Analyzing trace with hash 672233719, now seen corresponding path program 3 times [2021-12-06 20:12:37,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:12:37,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797755054] [2021-12-06 20:12:37,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:12:37,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:12:37,672 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:12:37,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1159768511] [2021-12-06 20:12:37,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:12:37,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:12:37,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:12:37,676 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:12:37,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 20:12:37,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 20:12:37,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:12:37,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 20:12:37,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:12:38,163 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 71 proven. 4 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2021-12-06 20:12:38,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:12:48,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:12:48,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797755054] [2021-12-06 20:12:48,581 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:12:48,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159768511] [2021-12-06 20:12:48,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159768511] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:12:48,581 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 20:12:48,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-12-06 20:12:48,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375922766] [2021-12-06 20:12:48,581 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 20:12:48,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 20:12:48,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:12:48,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 20:12:48,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-06 20:12:48,582 INFO L87 Difference]: Start difference. First operand 142 states and 174 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 20:12:48,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:12:48,747 INFO L93 Difference]: Finished difference Result 152 states and 182 transitions. [2021-12-06 20:12:48,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 20:12:48,747 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 91 [2021-12-06 20:12:48,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:12:48,748 INFO L225 Difference]: With dead ends: 152 [2021-12-06 20:12:48,748 INFO L226 Difference]: Without dead ends: 150 [2021-12-06 20:12:48,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-12-06 20:12:48,749 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 16 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:12:48,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 59 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:12:48,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-12-06 20:12:48,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2021-12-06 20:12:48,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 97 states have (on average 1.1649484536082475) internal successors, (113), 98 states have internal predecessors, (113), 34 states have call successors, (34), 18 states have call predecessors, (34), 18 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-06 20:12:48,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 180 transitions. [2021-12-06 20:12:48,769 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 180 transitions. Word has length 91 [2021-12-06 20:12:48,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:12:48,770 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 180 transitions. [2021-12-06 20:12:48,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 20:12:48,770 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 180 transitions. [2021-12-06 20:12:48,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-06 20:12:48,771 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:12:48,771 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:12:48,790 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 20:12:48,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:12:48,972 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:12:48,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:12:48,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1149721345, now seen corresponding path program 1 times [2021-12-06 20:12:48,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:12:48,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899292187] [2021-12-06 20:12:48,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:12:48,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:12:48,996 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:12:48,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [653589839] [2021-12-06 20:12:48,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:12:48,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:12:48,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:12:49,000 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:12:49,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 20:12:49,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:12:49,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 20:12:49,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:12:49,301 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2021-12-06 20:12:49,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:12:49,926 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2021-12-06 20:12:49,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:12:49,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899292187] [2021-12-06 20:12:49,927 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:12:49,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653589839] [2021-12-06 20:12:49,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653589839] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:12:49,927 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:12:49,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-12-06 20:12:49,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12756446] [2021-12-06 20:12:49,927 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:12:49,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 20:12:49,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:12:49,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 20:12:49,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-06 20:12:49,928 INFO L87 Difference]: Start difference. First operand 150 states and 180 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 6 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) [2021-12-06 20:12:50,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:12:50,187 INFO L93 Difference]: Finished difference Result 158 states and 188 transitions. [2021-12-06 20:12:50,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 20:12:50,188 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 6 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) Word has length 102 [2021-12-06 20:12:50,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:12:50,189 INFO L225 Difference]: With dead ends: 158 [2021-12-06 20:12:50,189 INFO L226 Difference]: Without dead ends: 150 [2021-12-06 20:12:50,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 192 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-12-06 20:12:50,190 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 5 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:12:50,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 330 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:12:50,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-12-06 20:12:50,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2021-12-06 20:12:50,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 97 states have (on average 1.1546391752577319) internal successors, (112), 98 states have internal predecessors, (112), 34 states have call successors, (34), 18 states have call predecessors, (34), 18 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-06 20:12:50,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 179 transitions. [2021-12-06 20:12:50,209 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 179 transitions. Word has length 102 [2021-12-06 20:12:50,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:12:50,210 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 179 transitions. [2021-12-06 20:12:50,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 6 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) [2021-12-06 20:12:50,210 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 179 transitions. [2021-12-06 20:12:50,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-06 20:12:50,211 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:12:50,211 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:12:50,242 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 20:12:50,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:12:50,413 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:12:50,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:12:50,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1393289704, now seen corresponding path program 2 times [2021-12-06 20:12:50,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:12:50,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163914444] [2021-12-06 20:12:50,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:12:50,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:12:50,437 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:12:50,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [567573958] [2021-12-06 20:12:50,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:12:50,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:12:50,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:12:50,440 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:12:50,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 20:12:50,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:12:50,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:12:50,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 20:12:50,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:12:50,731 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 171 proven. 30 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2021-12-06 20:12:50,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:12:51,073 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 55 proven. 30 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2021-12-06 20:12:51,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:12:51,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163914444] [2021-12-06 20:12:51,073 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:12:51,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567573958] [2021-12-06 20:12:51,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567573958] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:12:51,074 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:12:51,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-12-06 20:12:51,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489106427] [2021-12-06 20:12:51,074 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:12:51,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 20:12:51,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:12:51,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 20:12:51,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-12-06 20:12:51,075 INFO L87 Difference]: Start difference. First operand 150 states and 179 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 13 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (34), 13 states have call predecessors, (34), 13 states have call successors, (34) [2021-12-06 20:12:51,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:12:51,470 INFO L93 Difference]: Finished difference Result 202 states and 252 transitions. [2021-12-06 20:12:51,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 20:12:51,470 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 13 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (34), 13 states have call predecessors, (34), 13 states have call successors, (34) Word has length 112 [2021-12-06 20:12:51,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:12:51,472 INFO L225 Difference]: With dead ends: 202 [2021-12-06 20:12:51,472 INFO L226 Difference]: Without dead ends: 172 [2021-12-06 20:12:51,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2021-12-06 20:12:51,472 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 23 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:12:51,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 404 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 20:12:51,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-12-06 20:12:51,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 157. [2021-12-06 20:12:51,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 101 states have (on average 1.1287128712871286) internal successors, (114), 103 states have internal predecessors, (114), 37 states have call successors, (37), 18 states have call predecessors, (37), 18 states have return successors, (36), 35 states have call predecessors, (36), 36 states have call successors, (36) [2021-12-06 20:12:51,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 187 transitions. [2021-12-06 20:12:51,494 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 187 transitions. Word has length 112 [2021-12-06 20:12:51,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:12:51,494 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 187 transitions. [2021-12-06 20:12:51,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 13 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (34), 13 states have call predecessors, (34), 13 states have call successors, (34) [2021-12-06 20:12:51,495 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 187 transitions. [2021-12-06 20:12:51,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-06 20:12:51,496 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:12:51,496 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:12:51,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 20:12:51,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-06 20:12:51,697 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:12:51,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:12:51,698 INFO L85 PathProgramCache]: Analyzing trace with hash 2116653843, now seen corresponding path program 2 times [2021-12-06 20:12:51,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:12:51,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105881786] [2021-12-06 20:12:51,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:12:51,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:12:51,721 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:12:51,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1018090847] [2021-12-06 20:12:51,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:12:51,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:12:51,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:12:51,725 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:12:51,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 20:12:51,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:12:51,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:12:51,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 20:12:51,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:12:51,878 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 102 proven. 42 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2021-12-06 20:12:51,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:12:52,091 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 63 proven. 15 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2021-12-06 20:12:52,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:12:52,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105881786] [2021-12-06 20:12:52,091 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:12:52,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018090847] [2021-12-06 20:12:52,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018090847] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:12:52,092 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:12:52,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-12-06 20:12:52,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733138547] [2021-12-06 20:12:52,092 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:12:52,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 20:12:52,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:12:52,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 20:12:52,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-06 20:12:52,093 INFO L87 Difference]: Start difference. First operand 157 states and 187 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 8 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (34), 8 states have call predecessors, (34), 8 states have call successors, (34) [2021-12-06 20:12:52,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:12:52,152 INFO L93 Difference]: Finished difference Result 177 states and 204 transitions. [2021-12-06 20:12:52,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 20:12:52,152 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 8 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (34), 8 states have call predecessors, (34), 8 states have call successors, (34) Word has length 115 [2021-12-06 20:12:52,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:12:52,153 INFO L225 Difference]: With dead ends: 177 [2021-12-06 20:12:52,153 INFO L226 Difference]: Without dead ends: 121 [2021-12-06 20:12:52,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 218 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-06 20:12:52,154 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 2 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:12:52,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 132 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:12:52,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-06 20:12:52,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2021-12-06 20:12:52,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 79 states have (on average 1.1139240506329113) internal successors, (88), 80 states have internal predecessors, (88), 24 states have call successors, (24), 17 states have call predecessors, (24), 17 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-12-06 20:12:52,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 135 transitions. [2021-12-06 20:12:52,169 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 135 transitions. Word has length 115 [2021-12-06 20:12:52,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:12:52,169 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 135 transitions. [2021-12-06 20:12:52,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 8 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (34), 8 states have call predecessors, (34), 8 states have call successors, (34) [2021-12-06 20:12:52,169 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 135 transitions. [2021-12-06 20:12:52,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-06 20:12:52,170 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:12:52,170 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:12:52,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-06 20:12:52,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 20:12:52,372 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:12:52,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:12:52,373 INFO L85 PathProgramCache]: Analyzing trace with hash 289773103, now seen corresponding path program 3 times [2021-12-06 20:12:52,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:12:52,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996626104] [2021-12-06 20:12:52,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:12:52,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:12:52,395 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:12:52,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [817227905] [2021-12-06 20:12:52,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:12:52,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:12:52,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:12:52,399 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:12:52,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 20:12:52,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 20:12:52,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:12:52,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 20:12:52,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:12:53,288 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 144 proven. 4 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2021-12-06 20:12:53,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:13:21,956 WARN L227 SmtUtils]: Spent 18.53s on a formula simplification. DAG size of input: 69 DAG size of output: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 20:13:21,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:13:21,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996626104] [2021-12-06 20:13:21,958 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:13:21,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817227905] [2021-12-06 20:13:21,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817227905] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:13:21,958 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 20:13:21,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-12-06 20:13:21,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69603300] [2021-12-06 20:13:21,958 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 20:13:21,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 20:13:21,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:13:21,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 20:13:21,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-12-06 20:13:21,960 INFO L87 Difference]: Start difference. First operand 121 states and 135 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-06 20:13:22,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:13:22,052 INFO L93 Difference]: Finished difference Result 145 states and 167 transitions. [2021-12-06 20:13:22,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 20:13:22,052 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 116 [2021-12-06 20:13:22,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:13:22,053 INFO L225 Difference]: With dead ends: 145 [2021-12-06 20:13:22,053 INFO L226 Difference]: Without dead ends: 143 [2021-12-06 20:13:22,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-12-06 20:13:22,054 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 15 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:13:22,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 90 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 94 Invalid, 0 Unknown, 35 Unchecked, 0.0s Time] [2021-12-06 20:13:22,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-12-06 20:13:22,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2021-12-06 20:13:22,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 92 states have (on average 1.141304347826087) internal successors, (105), 94 states have internal predecessors, (105), 29 states have call successors, (29), 19 states have call predecessors, (29), 19 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2021-12-06 20:13:22,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 162 transitions. [2021-12-06 20:13:22,078 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 162 transitions. Word has length 116 [2021-12-06 20:13:22,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:13:22,078 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 162 transitions. [2021-12-06 20:13:22,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-06 20:13:22,079 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 162 transitions. [2021-12-06 20:13:22,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-06 20:13:22,080 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:13:22,080 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:13:22,102 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 20:13:22,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 20:13:22,281 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:13:22,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:13:22,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1978716845, now seen corresponding path program 4 times [2021-12-06 20:13:22,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:13:22,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297705587] [2021-12-06 20:13:22,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:13:22,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:13:22,302 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:13:22,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [970278567] [2021-12-06 20:13:22,302 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:13:22,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:13:22,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:13:22,303 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:13:22,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 20:13:22,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:13:22,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:13:22,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-06 20:13:22,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:13:22,772 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 36 proven. 51 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2021-12-06 20:13:22,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:14:10,112 WARN L227 SmtUtils]: Spent 15.13s on a formula simplification that was a NOOP. DAG size: 369 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 20:15:49,836 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 36 proven. 51 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2021-12-06 20:15:49,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:15:49,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297705587] [2021-12-06 20:15:49,836 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:15:49,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970278567] [2021-12-06 20:15:49,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970278567] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:15:49,836 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:15:49,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-12-06 20:15:49,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610122999] [2021-12-06 20:15:49,836 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:15:49,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 20:15:49,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:15:49,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 20:15:49,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-12-06 20:15:49,838 INFO L87 Difference]: Start difference. First operand 141 states and 162 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 states have internal predecessors, (47), 14 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (36), 12 states have call predecessors, (36), 12 states have call successors, (36) [2021-12-06 20:18:01,026 WARN L227 SmtUtils]: Spent 2.17m on a formula simplification. DAG size of input: 579 DAG size of output: 173 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 20:18:04,547 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:19:09,450 WARN L227 SmtUtils]: Spent 1.02m on a formula simplification. DAG size of input: 477 DAG size of output: 139 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 20:19:11,696 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:19:13,760 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:19:18,328 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:19:19,645 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:19:20,743 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:21:09,071 WARN L227 SmtUtils]: Spent 1.76m on a formula simplification. DAG size of input: 264 DAG size of output: 139 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 20:21:18,904 WARN L227 SmtUtils]: Spent 8.41s on a formula simplification. DAG size of input: 582 DAG size of output: 33 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 20:21:20,978 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:21:26,800 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:21:28,891 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:21:30,571 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:21:32,390 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:21:39,970 WARN L227 SmtUtils]: Spent 6.35s on a formula simplification. DAG size of input: 101 DAG size of output: 59 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 20:21:42,187 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:21:44,193 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:21:46,199 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:21:49,333 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:21:50,898 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:21:55,989 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:21:57,995 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:22:01,995 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:22:04,525 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:22:11,606 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:22:13,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:22:13,490 INFO L93 Difference]: Finished difference Result 335 states and 445 transitions. [2021-12-06 20:22:13,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 20:22:13,492 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 states have internal predecessors, (47), 14 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (36), 12 states have call predecessors, (36), 12 states have call successors, (36) Word has length 116 [2021-12-06 20:22:13,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:22:13,493 INFO L225 Difference]: With dead ends: 335 [2021-12-06 20:22:13,493 INFO L226 Difference]: Without dead ends: 284 [2021-12-06 20:22:13,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 208 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 352.0s TimeCoverageRelationStatistics Valid=229, Invalid=581, Unknown=2, NotChecked=0, Total=812 [2021-12-06 20:22:13,494 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 113 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 314 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 1064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 314 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:22:13,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 575 Invalid, 1064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [314 Valid, 737 Invalid, 13 Unknown, 0 Unchecked, 53.5s Time] [2021-12-06 20:22:13,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-12-06 20:22:13,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 253. [2021-12-06 20:22:13,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 161 states have (on average 1.236024844720497) internal successors, (199), 167 states have internal predecessors, (199), 66 states have call successors, (66), 25 states have call predecessors, (66), 25 states have return successors, (65), 60 states have call predecessors, (65), 65 states have call successors, (65) [2021-12-06 20:22:13,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 330 transitions. [2021-12-06 20:22:13,559 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 330 transitions. Word has length 116 [2021-12-06 20:22:13,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:22:13,560 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 330 transitions. [2021-12-06 20:22:13,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 states have internal predecessors, (47), 14 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (36), 12 states have call predecessors, (36), 12 states have call successors, (36) [2021-12-06 20:22:13,560 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 330 transitions. [2021-12-06 20:22:13,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-06 20:22:13,561 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:22:13,561 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:22:13,580 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 20:22:13,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 20:22:13,763 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:22:13,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:22:13,764 INFO L85 PathProgramCache]: Analyzing trace with hash -142976890, now seen corresponding path program 1 times [2021-12-06 20:22:13,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:22:13,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416732214] [2021-12-06 20:22:13,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:22:13,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:22:13,786 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:22:13,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [801166583] [2021-12-06 20:22:13,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:22:13,787 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:22:13,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:22:13,790 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:22:13,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 20:22:13,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:22:13,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-06 20:22:13,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:22:14,163 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 43 proven. 56 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2021-12-06 20:22:14,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:22:16,764 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 42 proven. 57 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2021-12-06 20:22:16,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:22:16,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416732214] [2021-12-06 20:22:16,765 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:22:16,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801166583] [2021-12-06 20:22:16,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801166583] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:22:16,765 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:22:16,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-12-06 20:22:16,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048688502] [2021-12-06 20:22:16,765 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:22:16,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 20:22:16,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:22:16,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 20:22:16,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-12-06 20:22:16,766 INFO L87 Difference]: Start difference. First operand 253 states and 330 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 13 states have call successors, (44), 2 states have call predecessors, (44), 1 states have return successors, (42), 13 states have call predecessors, (42), 13 states have call successors, (42) [2021-12-06 20:22:17,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:22:17,915 INFO L93 Difference]: Finished difference Result 365 states and 486 transitions. [2021-12-06 20:22:17,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 20:22:17,916 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 13 states have call successors, (44), 2 states have call predecessors, (44), 1 states have return successors, (42), 13 states have call predecessors, (42), 13 states have call successors, (42) Word has length 132 [2021-12-06 20:22:17,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:22:17,918 INFO L225 Difference]: With dead ends: 365 [2021-12-06 20:22:17,918 INFO L226 Difference]: Without dead ends: 246 [2021-12-06 20:22:17,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 239 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=257, Invalid=1003, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 20:22:17,919 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 75 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:22:17,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 540 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 20:22:17,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-12-06 20:22:17,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 240. [2021-12-06 20:22:17,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 153 states have (on average 1.1568627450980393) internal successors, (177), 158 states have internal predecessors, (177), 61 states have call successors, (61), 25 states have call predecessors, (61), 25 states have return successors, (60), 56 states have call predecessors, (60), 60 states have call successors, (60) [2021-12-06 20:22:17,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 298 transitions. [2021-12-06 20:22:17,977 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 298 transitions. Word has length 132 [2021-12-06 20:22:17,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:22:17,977 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 298 transitions. [2021-12-06 20:22:17,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 13 states have call successors, (44), 2 states have call predecessors, (44), 1 states have return successors, (42), 13 states have call predecessors, (42), 13 states have call successors, (42) [2021-12-06 20:22:17,977 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 298 transitions. [2021-12-06 20:22:17,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-06 20:22:17,978 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:22:17,978 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 22, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:22:17,997 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 20:22:18,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 20:22:18,180 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:22:18,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:22:18,181 INFO L85 PathProgramCache]: Analyzing trace with hash -558734883, now seen corresponding path program 2 times [2021-12-06 20:22:18,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:22:18,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141294007] [2021-12-06 20:22:18,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:22:18,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:22:18,203 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:22:18,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [347014262] [2021-12-06 20:22:18,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:22:18,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:22:18,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:22:18,207 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:22:18,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 20:22:18,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:22:18,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:22:18,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 20:22:18,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:22:18,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 554 proven. 0 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2021-12-06 20:22:18,500 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:22:18,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:22:18,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141294007] [2021-12-06 20:22:18,501 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:22:18,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347014262] [2021-12-06 20:22:18,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347014262] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:22:18,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:22:18,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 20:22:18,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619016200] [2021-12-06 20:22:18,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:22:18,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 20:22:18,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:22:18,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 20:22:18,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-06 20:22:18,502 INFO L87 Difference]: Start difference. First operand 240 states and 298 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2021-12-06 20:22:18,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:22:18,686 INFO L93 Difference]: Finished difference Result 292 states and 339 transitions. [2021-12-06 20:22:18,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 20:22:18,687 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 136 [2021-12-06 20:22:18,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:22:18,688 INFO L225 Difference]: With dead ends: 292 [2021-12-06 20:22:18,688 INFO L226 Difference]: Without dead ends: 170 [2021-12-06 20:22:18,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-12-06 20:22:18,689 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 40 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:22:18,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 131 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:22:18,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-12-06 20:22:18,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2021-12-06 20:22:18,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 110 states have (on average 1.0636363636363637) internal successors, (117), 113 states have internal predecessors, (117), 38 states have call successors, (38), 21 states have call predecessors, (38), 21 states have return successors, (37), 35 states have call predecessors, (37), 37 states have call successors, (37) [2021-12-06 20:22:18,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 192 transitions. [2021-12-06 20:22:18,722 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 192 transitions. Word has length 136 [2021-12-06 20:22:18,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:22:18,723 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 192 transitions. [2021-12-06 20:22:18,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2021-12-06 20:22:18,723 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 192 transitions. [2021-12-06 20:22:18,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-06 20:22:18,724 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:22:18,724 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 23, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:22:18,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-06 20:22:18,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:22:18,924 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:22:18,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:22:18,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1145564436, now seen corresponding path program 3 times [2021-12-06 20:22:18,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:22:18,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13786249] [2021-12-06 20:22:18,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:22:18,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:22:18,930 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:22:18,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [77115210] [2021-12-06 20:22:18,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:22:18,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:22:18,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:22:18,931 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:22:18,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 20:22:18,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 20:22:18,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:22:18,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 20:22:18,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:22:19,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 112 proven. 4 refuted. 0 times theorem prover too weak. 1018 trivial. 0 not checked. [2021-12-06 20:22:19,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:22:19,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 112 proven. 4 refuted. 0 times theorem prover too weak. 1018 trivial. 0 not checked. [2021-12-06 20:22:19,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:22:19,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13786249] [2021-12-06 20:22:19,234 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:22:19,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77115210] [2021-12-06 20:22:19,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77115210] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:22:19,234 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:22:19,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-12-06 20:22:19,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268199449] [2021-12-06 20:22:19,234 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:22:19,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 20:22:19,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:22:19,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 20:22:19,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-12-06 20:22:19,235 INFO L87 Difference]: Start difference. First operand 170 states and 192 transitions. Second operand has 12 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) [2021-12-06 20:22:19,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:22:19,349 INFO L93 Difference]: Finished difference Result 176 states and 197 transitions. [2021-12-06 20:22:19,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 20:22:19,349 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) Word has length 145 [2021-12-06 20:22:19,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:22:19,350 INFO L225 Difference]: With dead ends: 176 [2021-12-06 20:22:19,350 INFO L226 Difference]: Without dead ends: 164 [2021-12-06 20:22:19,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 278 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-12-06 20:22:19,351 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 22 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:22:19,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 88 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:22:19,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-12-06 20:22:19,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 160. [2021-12-06 20:22:19,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 105 states have (on average 1.0285714285714285) internal successors, (108), 107 states have internal predecessors, (108), 34 states have call successors, (34), 20 states have call predecessors, (34), 20 states have return successors, (34), 32 states have call predecessors, (34), 34 states have call successors, (34) [2021-12-06 20:22:19,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 176 transitions. [2021-12-06 20:22:19,378 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 176 transitions. Word has length 145 [2021-12-06 20:22:19,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:22:19,379 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 176 transitions. [2021-12-06 20:22:19,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) [2021-12-06 20:22:19,379 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 176 transitions. [2021-12-06 20:22:19,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-12-06 20:22:19,379 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:22:19,380 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 24, 7, 7, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:22:19,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-06 20:22:19,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:22:19,582 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:22:19,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:22:19,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1211479279, now seen corresponding path program 4 times [2021-12-06 20:22:19,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:22:19,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352610415] [2021-12-06 20:22:19,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:22:19,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:22:19,607 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:22:19,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1875604420] [2021-12-06 20:22:19,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:22:19,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:22:19,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:22:19,610 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:22:19,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 20:22:19,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:22:19,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:22:19,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 20:22:19,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:22:19,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1269 backedges. 409 proven. 57 refuted. 0 times theorem prover too weak. 803 trivial. 0 not checked. [2021-12-06 20:22:19,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:22:20,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1269 backedges. 97 proven. 57 refuted. 0 times theorem prover too weak. 1115 trivial. 0 not checked. [2021-12-06 20:22:20,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:22:20,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352610415] [2021-12-06 20:22:20,104 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:22:20,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875604420] [2021-12-06 20:22:20,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875604420] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:22:20,104 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:22:20,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-12-06 20:22:20,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573702389] [2021-12-06 20:22:20,104 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:22:20,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 20:22:20,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:22:20,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 20:22:20,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-06 20:22:20,105 INFO L87 Difference]: Start difference. First operand 160 states and 176 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 8 states have call successors, (39), 2 states have call predecessors, (39), 2 states have return successors, (39), 8 states have call predecessors, (39), 8 states have call successors, (39) [2021-12-06 20:22:20,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:22:20,196 INFO L93 Difference]: Finished difference Result 176 states and 191 transitions. [2021-12-06 20:22:20,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 20:22:20,197 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 8 states have call successors, (39), 2 states have call predecessors, (39), 2 states have return successors, (39), 8 states have call predecessors, (39), 8 states have call successors, (39) Word has length 155 [2021-12-06 20:22:20,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:22:20,197 INFO L225 Difference]: With dead ends: 176 [2021-12-06 20:22:20,197 INFO L226 Difference]: Without dead ends: 0 [2021-12-06 20:22:20,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 300 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-06 20:22:20,198 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 2 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:22:20,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 291 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:22:20,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-06 20:22:20,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-06 20:22:20,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:22:20,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-06 20:22:20,199 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 155 [2021-12-06 20:22:20,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:22:20,199 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-06 20:22:20,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 8 states have call successors, (39), 2 states have call predecessors, (39), 2 states have return successors, (39), 8 states have call predecessors, (39), 8 states have call successors, (39) [2021-12-06 20:22:20,199 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-06 20:22:20,199 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-06 20:22:20,201 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-06 20:22:20,221 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-06 20:22:20,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-06 20:22:20,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-06 20:22:41,879 WARN L227 SmtUtils]: Spent 18.13s on a formula simplification. DAG size of input: 381 DAG size of output: 370 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-12-06 20:22:53,322 WARN L227 SmtUtils]: Spent 5.03s on a formula simplification. DAG size of input: 409 DAG size of output: 103 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-12-06 20:22:54,264 INFO L861 garLoopResultBuilder]: At program point L60(lines 22 61) the Hoare annotation is: true [2021-12-06 20:22:54,264 INFO L858 garLoopResultBuilder]: For program point L52(lines 52 55) no Hoare annotation was computed. [2021-12-06 20:22:54,264 INFO L858 garLoopResultBuilder]: For program point L52-2(lines 22 61) no Hoare annotation was computed. [2021-12-06 20:22:54,264 INFO L858 garLoopResultBuilder]: For program point L11(lines 11 13) no Hoare annotation was computed. [2021-12-06 20:22:54,264 INFO L854 garLoopResultBuilder]: At program point L44-1(lines 44 56) the Hoare annotation is: (and (= (* |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~B~0#1|) |ULTIMATE.start_main_~d~0#1|) (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) (= (+ |ULTIMATE.start_main_~r~0#1| (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~d~0#1|)) |ULTIMATE.start_main_~A~0#1|) (= |ULTIMATE.start_main_~B~0#1| 1)) [2021-12-06 20:22:54,264 INFO L854 garLoopResultBuilder]: At program point L36(line 36) the Hoare annotation is: (let ((.cse7 (div |ULTIMATE.start_main_~d~0#1| 2))) (let ((.cse2 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse6 (<= .cse7 |ULTIMATE.start_main_~r~0#1|)) (.cse0 (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1)) (.cse1 (= (* |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~B~0#1|) |ULTIMATE.start_main_~d~0#1|)) (.cse3 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse8 (= (+ |ULTIMATE.start_main_~r~0#1| (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~d~0#1|)) |ULTIMATE.start_main_~A~0#1|)) (.cse4 (<= |ULTIMATE.start_main_~A~0#1| 5)) (.cse5 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (and .cse0 .cse1 .cse2 .cse3 (= |ULTIMATE.start_main_~d~0#1| 4) .cse4 .cse5 .cse6) (and .cse0 (= |ULTIMATE.start_main_~p~0#1| 8) (= (+ .cse7 |ULTIMATE.start_main_~A~0#1|) (+ (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~B~0#1|) |ULTIMATE.start_main_~r~0#1| (* (div |ULTIMATE.start_main_~p~0#1| 2) |ULTIMATE.start_main_~B~0#1|))) .cse2 .cse3 .cse4 .cse5 (= (mod |ULTIMATE.start_main_~d~0#1| 2) 0) .cse6) (and .cse0 (= 2 |ULTIMATE.start_main_~p~0#1|) .cse3 .cse8 (<= (+ .cse7 (div (+ (- 1) (* (div .cse7 2) (- 1))) (- 2))) (+ |ULTIMATE.start_main_~r~0#1| 1)) .cse4 .cse5 (= 2 |ULTIMATE.start_main_~d~0#1|)) (and .cse0 .cse1 (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) .cse3 .cse8 .cse4 .cse5 (<= 0 |ULTIMATE.start_main_~A~0#1|))))) [2021-12-06 20:22:54,264 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-12-06 20:22:54,264 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-12-06 20:22:54,264 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-12-06 20:22:54,264 INFO L854 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (let ((.cse27 (* |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~B~0#1|)) (.cse18 (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~B~0#1|)) (.cse7 (* |ULTIMATE.start_main_~r~0#1| (- 1))) (.cse13 (* 4 |ULTIMATE.start_main_~B~0#1|)) (.cse22 (div |ULTIMATE.start_main_~p~0#1| 2)) (.cse17 (div |ULTIMATE.start_main_~d~0#1| 2))) (let ((.cse2 (< |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~d~0#1|)) (.cse5 (<= .cse17 |ULTIMATE.start_main_~r~0#1|)) (.cse19 (* .cse22 |ULTIMATE.start_main_~B~0#1|)) (.cse1 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse6 (= |ULTIMATE.start_main_~p~0#1| 1)) (.cse21 (< |ULTIMATE.start_main_~A~0#1| .cse13)) (.cse11 (= (div (+ |ULTIMATE.start_main_~A~0#1| .cse7) 2) |ULTIMATE.start_main_~d~0#1|)) (.cse20 (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|)) (.cse14 (= |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~q~0#1|)) (.cse23 (= (+ .cse18 |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~A~0#1|)) (.cse15 (= (+ |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~d~0#1|) (+ .cse18 .cse27 |ULTIMATE.start_main_~r~0#1|))) (.cse8 (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1)) (.cse0 (= .cse27 |ULTIMATE.start_main_~d~0#1|)) (.cse10 (<= 0 |ULTIMATE.start_main_~r~0#1|)) (.cse12 (<= |ULTIMATE.start_main_~A~0#1| 5)) (.cse16 (exists ((|aux_mod_v_ULTIMATE.start_main_~p~0#1_62_41| Int) (|ULTIMATE.start_main_~p~0#1| Int)) (let ((.cse25 (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~B~0#1|)) (.cse24 (* |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~B~0#1|)) (.cse26 (* |aux_mod_v_ULTIMATE.start_main_~p~0#1_62_41| |ULTIMATE.start_main_~B~0#1|))) (and (< |aux_mod_v_ULTIMATE.start_main_~p~0#1_62_41| 2) (= (+ .cse24 |ULTIMATE.start_main_~A~0#1|) (+ .cse25 |ULTIMATE.start_main_~r~0#1| (div (+ (* 2 |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~B~0#1|) .cse26) 2))) (<= 0 |aux_mod_v_ULTIMATE.start_main_~p~0#1_62_41|) (< |ULTIMATE.start_main_~A~0#1| (+ .cse25 .cse24 .cse26)))))) (.cse9 (= 2 |ULTIMATE.start_main_~p~0#1|)) (.cse3 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse4 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (and .cse0 .cse1 .cse2 .cse3 (= |ULTIMATE.start_main_~d~0#1| 4) .cse4 .cse5) (and .cse6 .cse2 .cse4 (= |ULTIMATE.start_main_~d~0#1| (div (+ (* |ULTIMATE.start_main_~B~0#1| (- 4)) |ULTIMATE.start_main_~A~0#1| .cse7) 2)) (= |ULTIMATE.start_main_~A~0#1| (+ |ULTIMATE.start_main_~r~0#1| (* 6 |ULTIMATE.start_main_~B~0#1|))) (= 6 |ULTIMATE.start_main_~q~0#1|)) (and .cse8 .cse9 .cse10 .cse11 (= |ULTIMATE.start_main_~q~0#1| 4) .cse12 .cse4 (= (+ .cse13 |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~A~0#1|)) (and .cse8 (= .cse13 |ULTIMATE.start_main_~d~0#1|) .cse14 (<= .cse13 (+ |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~r~0#1|)) .cse15 .cse12 .cse4 .cse16) (and .cse8 (= |ULTIMATE.start_main_~p~0#1| 8) (= (+ .cse17 |ULTIMATE.start_main_~A~0#1|) (+ .cse18 |ULTIMATE.start_main_~r~0#1| .cse19)) .cse1 .cse3 .cse12 .cse4 (= (mod |ULTIMATE.start_main_~d~0#1| 2) 0) .cse5) (and .cse0 .cse20 .cse21 .cse10 (= |ULTIMATE.start_main_~A~0#1| (+ (* 3 |ULTIMATE.start_main_~B~0#1|) |ULTIMATE.start_main_~r~0#1|)) (= (+ .cse17 (div .cse17 2) |ULTIMATE.start_main_~A~0#1|) (+ .cse18 |ULTIMATE.start_main_~r~0#1| .cse19 (* (div .cse22 2) |ULTIMATE.start_main_~B~0#1|)))) (and .cse6 .cse20 .cse1 .cse3 .cse4) (and .cse6 .cse21 .cse11 .cse23 (= 2 |ULTIMATE.start_main_~q~0#1|) .cse4) (and .cse20 .cse23 (= |ULTIMATE.start_main_~q~0#1| 1) .cse15 .cse4) (and (<= 0 (+ |ULTIMATE.start_main_~r~0#1| 1)) .cse9 .cse14 .cse23 .cse15 (< |ULTIMATE.start_main_~r~0#1| 2) .cse4) (and .cse8 (<= 1 |ULTIMATE.start_main_~p~0#1|) .cse0 .cse10 (<= (div (+ (- 1) (* |ULTIMATE.start_main_~d~0#1| (- 2))) (- 2)) (+ |ULTIMATE.start_main_~B~0#1| 1)) .cse12 .cse4 (<= 0 |ULTIMATE.start_main_~A~0#1|) .cse16) (and (= |ULTIMATE.start_main_~d~0#1| (* 2 |ULTIMATE.start_main_~B~0#1|)) .cse9 .cse3 (= (+ |ULTIMATE.start_main_~r~0#1| (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~d~0#1|)) |ULTIMATE.start_main_~A~0#1|) .cse4)))) [2021-12-06 20:22:54,265 INFO L858 garLoopResultBuilder]: For program point L12(line 12) no Hoare annotation was computed. [2021-12-06 20:22:54,265 INFO L854 garLoopResultBuilder]: At program point L45-1(line 45) the Hoare annotation is: (let ((.cse24 (* |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~B~0#1|))) (let ((.cse10 (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~B~0#1|)) (.cse17 (= |ULTIMATE.start_main_~p~0#1| 1)) (.cse0 (= .cse24 |ULTIMATE.start_main_~d~0#1|)) (.cse23 (= (+ |ULTIMATE.start_main_~r~0#1| (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~d~0#1|)) |ULTIMATE.start_main_~A~0#1|)) (.cse7 (* |ULTIMATE.start_main_~r~0#1| (- 1))) (.cse21 (* 4 |ULTIMATE.start_main_~B~0#1|)) (.cse9 (div |ULTIMATE.start_main_~d~0#1| 2))) (let ((.cse2 (< |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~d~0#1|)) (.cse5 (<= .cse9 |ULTIMATE.start_main_~r~0#1|)) (.cse1 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse14 (< |ULTIMATE.start_main_~A~0#1| .cse21)) (.cse20 (= (div (+ |ULTIMATE.start_main_~A~0#1| .cse7) 2) |ULTIMATE.start_main_~d~0#1|)) (.cse18 (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|)) (.cse8 (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1)) (.cse12 (<= 1 |ULTIMATE.start_main_~p~0#1|)) (.cse13 (or (not .cse17) (not .cse0) .cse23)) (.cse15 (<= 0 |ULTIMATE.start_main_~r~0#1|)) (.cse11 (<= |ULTIMATE.start_main_~A~0#1| 5)) (.cse22 (= |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~q~0#1|)) (.cse6 (= (+ .cse10 |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~A~0#1|)) (.cse16 (= (+ |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~d~0#1|) (+ .cse10 .cse24 |ULTIMATE.start_main_~r~0#1|))) (.cse19 (= 2 |ULTIMATE.start_main_~p~0#1|)) (.cse3 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse4 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (and .cse0 .cse1 .cse2 .cse3 (= |ULTIMATE.start_main_~d~0#1| 4) .cse4 .cse5) (and .cse0 .cse6 .cse2 .cse4 (= |ULTIMATE.start_main_~d~0#1| (div (+ (* |ULTIMATE.start_main_~B~0#1| (- 4)) |ULTIMATE.start_main_~A~0#1| .cse7) 2)) (= 6 |ULTIMATE.start_main_~q~0#1|)) (and .cse8 (= |ULTIMATE.start_main_~p~0#1| 8) (= (+ .cse9 |ULTIMATE.start_main_~A~0#1|) (+ .cse10 |ULTIMATE.start_main_~r~0#1| (* (div |ULTIMATE.start_main_~p~0#1| 2) |ULTIMATE.start_main_~B~0#1|))) .cse1 .cse3 .cse11 .cse4 (= (mod |ULTIMATE.start_main_~d~0#1| 2) 0) .cse5) (and .cse12 .cse13 .cse14 .cse15 (= 3 |ULTIMATE.start_main_~q~0#1|) (< |ULTIMATE.start_main_~d~0#1| 2) .cse16 .cse4) (and .cse17 .cse18 .cse1 .cse3 .cse4) (and .cse8 .cse12 .cse19 .cse15 .cse20 .cse6 .cse11 .cse4 (= (+ .cse21 |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~A~0#1|)) (and .cse12 .cse17 .cse14 .cse20 .cse6 (= 2 |ULTIMATE.start_main_~q~0#1|) .cse4) (and .cse8 (= .cse21 |ULTIMATE.start_main_~d~0#1|) .cse22 .cse6 (<= .cse21 (+ |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~r~0#1|)) .cse16 .cse11 .cse4) (and .cse18 .cse6 (= |ULTIMATE.start_main_~q~0#1| 1) .cse16 .cse4) (and .cse8 .cse12 .cse0 .cse13 .cse15 (<= (div (+ (- 1) (* |ULTIMATE.start_main_~d~0#1| (- 2))) (- 2)) (+ |ULTIMATE.start_main_~B~0#1| 1)) .cse11 .cse4 (<= 0 |ULTIMATE.start_main_~A~0#1|)) (and (<= 0 (+ |ULTIMATE.start_main_~r~0#1| 1)) .cse19 .cse22 .cse6 .cse16 (< |ULTIMATE.start_main_~r~0#1| 2) .cse4) (and (= |ULTIMATE.start_main_~d~0#1| (* 2 |ULTIMATE.start_main_~B~0#1|)) .cse19 .cse3 .cse23 .cse4))))) [2021-12-06 20:22:54,265 INFO L858 garLoopResultBuilder]: For program point L37(lines 34 42) no Hoare annotation was computed. [2021-12-06 20:22:54,265 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-12-06 20:22:54,265 INFO L854 garLoopResultBuilder]: At program point L58(line 58) the Hoare annotation is: (and (= |ULTIMATE.start_main_~p~0#1| 1) (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) (= |ULTIMATE.start_main_~B~0#1| 1)) [2021-12-06 20:22:54,265 INFO L858 garLoopResultBuilder]: For program point L46(lines 44 56) no Hoare annotation was computed. [2021-12-06 20:22:54,265 INFO L854 garLoopResultBuilder]: At program point L34-2(lines 34 42) the Hoare annotation is: (let ((.cse7 (div |ULTIMATE.start_main_~d~0#1| 2))) (let ((.cse2 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse6 (<= .cse7 |ULTIMATE.start_main_~r~0#1|)) (.cse0 (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1)) (.cse1 (= (* |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~B~0#1|) |ULTIMATE.start_main_~d~0#1|)) (.cse3 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse8 (= (+ |ULTIMATE.start_main_~r~0#1| (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~d~0#1|)) |ULTIMATE.start_main_~A~0#1|)) (.cse4 (<= |ULTIMATE.start_main_~A~0#1| 5)) (.cse5 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (and .cse0 .cse1 .cse2 .cse3 (= |ULTIMATE.start_main_~d~0#1| 4) .cse4 .cse5 .cse6) (and .cse0 (= |ULTIMATE.start_main_~p~0#1| 8) (= (+ .cse7 |ULTIMATE.start_main_~A~0#1|) (+ (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~B~0#1|) |ULTIMATE.start_main_~r~0#1| (* (div |ULTIMATE.start_main_~p~0#1| 2) |ULTIMATE.start_main_~B~0#1|))) .cse2 .cse3 .cse4 .cse5 (= (mod |ULTIMATE.start_main_~d~0#1| 2) 0) .cse6) (and .cse0 (= 2 |ULTIMATE.start_main_~p~0#1|) .cse3 .cse8 (<= (+ .cse7 (div (+ (- 1) (* (div .cse7 2) (- 1))) (- 2))) (+ |ULTIMATE.start_main_~r~0#1| 1)) .cse4 .cse5 (= 2 |ULTIMATE.start_main_~d~0#1|)) (and .cse0 .cse1 (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) .cse3 .cse8 .cse4 .cse5 (<= 0 |ULTIMATE.start_main_~A~0#1|))))) [2021-12-06 20:22:54,265 INFO L858 garLoopResultBuilder]: For program point L59(line 59) no Hoare annotation was computed. [2021-12-06 20:22:54,265 INFO L854 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse7 (div |ULTIMATE.start_main_~d~0#1| 2))) (let ((.cse2 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse6 (<= .cse7 |ULTIMATE.start_main_~r~0#1|)) (.cse0 (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1)) (.cse1 (= (* |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~B~0#1|) |ULTIMATE.start_main_~d~0#1|)) (.cse3 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse8 (= (+ |ULTIMATE.start_main_~r~0#1| (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~d~0#1|)) |ULTIMATE.start_main_~A~0#1|)) (.cse4 (<= |ULTIMATE.start_main_~A~0#1| 5)) (.cse5 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (and .cse0 .cse1 .cse2 .cse3 (= |ULTIMATE.start_main_~d~0#1| 4) .cse4 .cse5 .cse6) (and .cse0 (= |ULTIMATE.start_main_~p~0#1| 8) (= (+ .cse7 |ULTIMATE.start_main_~A~0#1|) (+ (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~B~0#1|) |ULTIMATE.start_main_~r~0#1| (* (div |ULTIMATE.start_main_~p~0#1| 2) |ULTIMATE.start_main_~B~0#1|))) .cse2 .cse3 .cse4 .cse5 (= (mod |ULTIMATE.start_main_~d~0#1| 2) 0) .cse6) (and .cse0 (= 2 |ULTIMATE.start_main_~p~0#1|) .cse3 .cse8 (<= (+ .cse7 (div (+ (- 1) (* (div .cse7 2) (- 1))) (- 2))) (+ |ULTIMATE.start_main_~r~0#1| 1)) .cse4 .cse5 (= 2 |ULTIMATE.start_main_~d~0#1|)) (and .cse0 .cse1 (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) .cse3 .cse8 .cse4 .cse5 (<= 0 |ULTIMATE.start_main_~A~0#1|))))) [2021-12-06 20:22:54,265 INFO L854 garLoopResultBuilder]: At program point L35-1(line 35) the Hoare annotation is: (let ((.cse7 (div |ULTIMATE.start_main_~d~0#1| 2))) (let ((.cse2 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse6 (<= .cse7 |ULTIMATE.start_main_~r~0#1|)) (.cse0 (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1)) (.cse1 (= (* |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~B~0#1|) |ULTIMATE.start_main_~d~0#1|)) (.cse3 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse8 (= (+ |ULTIMATE.start_main_~r~0#1| (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~d~0#1|)) |ULTIMATE.start_main_~A~0#1|)) (.cse4 (<= |ULTIMATE.start_main_~A~0#1| 5)) (.cse5 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (and .cse0 .cse1 .cse2 .cse3 (= |ULTIMATE.start_main_~d~0#1| 4) .cse4 .cse5 .cse6) (and .cse0 (= |ULTIMATE.start_main_~p~0#1| 8) (= (+ .cse7 |ULTIMATE.start_main_~A~0#1|) (+ (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~B~0#1|) |ULTIMATE.start_main_~r~0#1| (* (div |ULTIMATE.start_main_~p~0#1| 2) |ULTIMATE.start_main_~B~0#1|))) .cse2 .cse3 .cse4 .cse5 (= (mod |ULTIMATE.start_main_~d~0#1| 2) 0) .cse6) (and .cse0 (= 2 |ULTIMATE.start_main_~p~0#1|) .cse3 .cse8 (<= (+ .cse7 (div (+ (- 1) (* (div .cse7 2) (- 1))) (- 2))) (+ |ULTIMATE.start_main_~r~0#1| 1)) .cse4 .cse5 (= 2 |ULTIMATE.start_main_~d~0#1|)) (and .cse0 .cse1 (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) .cse3 .cse8 .cse4 .cse5 (<= 0 |ULTIMATE.start_main_~A~0#1|))))) [2021-12-06 20:22:54,265 INFO L858 garLoopResultBuilder]: For program point L16(lines 16 17) no Hoare annotation was computed. [2021-12-06 20:22:54,265 INFO L858 garLoopResultBuilder]: For program point L15(lines 15 18) no Hoare annotation was computed. [2021-12-06 20:22:54,266 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2021-12-06 20:22:54,266 INFO L858 garLoopResultBuilder]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2021-12-06 20:22:54,266 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2021-12-06 20:22:54,266 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-12-06 20:22:54,268 INFO L732 BasicCegarLoop]: Path program histogram: [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:22:54,269 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-06 20:22:54,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.12 08:22:54 BoogieIcfgContainer [2021-12-06 20:22:54,280 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-06 20:22:54,281 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-06 20:22:54,281 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-06 20:22:54,281 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-06 20:22:54,281 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:11:03" (3/4) ... [2021-12-06 20:22:54,283 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-06 20:22:54,288 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-12-06 20:22:54,290 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-12-06 20:22:54,290 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-12-06 20:22:54,291 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-06 20:22:54,291 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-06 20:22:54,313 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/witness.graphml [2021-12-06 20:22:54,313 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-06 20:22:54,313 INFO L158 Benchmark]: Toolchain (without parser) took 711468.05ms. Allocated memory was 83.9MB in the beginning and 465.6MB in the end (delta: 381.7MB). Free memory was 63.6MB in the beginning and 201.9MB in the end (delta: -138.3MB). Peak memory consumption was 244.0MB. Max. memory is 16.1GB. [2021-12-06 20:22:54,313 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 83.9MB. Free memory is still 60.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 20:22:54,313 INFO L158 Benchmark]: CACSL2BoogieTranslator took 187.10ms. Allocated memory is still 83.9MB. Free memory was 63.3MB in the beginning and 60.6MB in the end (delta: 2.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-06 20:22:54,313 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.57ms. Allocated memory is still 83.9MB. Free memory was 60.6MB in the beginning and 59.0MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 20:22:54,314 INFO L158 Benchmark]: Boogie Preprocessor took 21.82ms. Allocated memory is still 83.9MB. Free memory was 59.0MB in the beginning and 58.1MB in the end (delta: 915.5kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 20:22:54,314 INFO L158 Benchmark]: RCFGBuilder took 190.87ms. Allocated memory is still 83.9MB. Free memory was 57.9MB in the beginning and 48.6MB in the end (delta: 9.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-06 20:22:54,314 INFO L158 Benchmark]: TraceAbstraction took 710996.79ms. Allocated memory was 83.9MB in the beginning and 465.6MB in the end (delta: 381.7MB). Free memory was 48.2MB in the beginning and 205.0MB in the end (delta: -156.8MB). Peak memory consumption was 273.9MB. Max. memory is 16.1GB. [2021-12-06 20:22:54,314 INFO L158 Benchmark]: Witness Printer took 32.10ms. Allocated memory is still 465.6MB. Free memory was 205.0MB in the beginning and 201.9MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-06 20:22:54,315 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 83.9MB. Free memory is still 60.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 187.10ms. Allocated memory is still 83.9MB. Free memory was 63.3MB in the beginning and 60.6MB in the end (delta: 2.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.57ms. Allocated memory is still 83.9MB. Free memory was 60.6MB in the beginning and 59.0MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 21.82ms. Allocated memory is still 83.9MB. Free memory was 59.0MB in the beginning and 58.1MB in the end (delta: 915.5kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 190.87ms. Allocated memory is still 83.9MB. Free memory was 57.9MB in the beginning and 48.6MB in the end (delta: 9.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 710996.79ms. Allocated memory was 83.9MB in the beginning and 465.6MB in the end (delta: 381.7MB). Free memory was 48.2MB in the beginning and 205.0MB in the end (delta: -156.8MB). Peak memory consumption was 273.9MB. Max. memory is 16.1GB. * Witness Printer took 32.10ms. Allocated memory is still 465.6MB. Free memory was 205.0MB in the beginning and 201.9MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 710.9s, OverallIterations: 21, TraceHistogramMax: 25, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 459.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 33.9s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 14 mSolverCounterUnknown, 645 SdHoareTripleChecker+Valid, 67.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 562 mSDsluCounter, 4229 SdHoareTripleChecker+Invalid, 67.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 35 IncrementalHoareTripleChecker+Unchecked, 3356 mSDsCounter, 1151 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3690 IncrementalHoareTripleChecker+Invalid, 4890 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1151 mSolverCounterUnsat, 873 mSDtfsCounter, 3690 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2869 GetRequests, 2600 SyntacticMatches, 22 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 438.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=253occurred in iteration=17, InterpolantAutomatonStates: 193, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 21 MinimizatonAttempts, 149 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 10 LocationsWithAnnotation, 207 PreInvPairs, 272 NumberOfFragments, 1549 HoareAnnotationTreeSize, 207 FomulaSimplifications, 619165 FormulaSimplificationTreeSizeReduction, 21.7s HoareSimplificationTime, 10 FomulaSimplificationsInter, 546324 FormulaSimplificationTreeSizeReductionInter, 12.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 211.4s InterpolantComputationTime, 1704 NumberOfCodeBlocks, 1517 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 2794 ConstructedInterpolants, 3 QuantifiedInterpolants, 79241 SizeOfPredicates, 46 NumberOfNonLiveVariables, 3480 ConjunctsInSsa, 335 ConjunctsInUnsatCore, 32 InterpolantComputations, 9 PerfectInterpolantSequences, 15568/16165 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (((((((((cond == 1 && p * B == d) && q == 0) && A == r) && d == 4) && A <= 5) && B == 1) && d / 2 <= r) || ((((((((cond == 1 && p == 8) && d / 2 + A == q * B + r + p / 2 * B) && q == 0) && A == r) && A <= 5) && B == 1) && d % 2 == 0) && d / 2 <= r)) || (((((((cond == 1 && 2 == p) && A == r) && r + q * d == A) && d / 2 + (-1 + d / 2 / 2 * -1) / -2 <= r + 1) && A <= 5) && B == 1) && 2 == d)) || (((((((cond == 1 && p * B == d) && B == d) && A == r) && r + q * d == A) && A <= 5) && B == 1) && 0 <= A) RESULT: Ultimate proved your program to be correct! [2021-12-06 20:22:54,523 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-12-06 20:22:54,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8211355-c565-4693-a938-bdb4d1ec3c52/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE