./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec11_productSimulator.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec11_productSimulator.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1c5af94617941f44648ac9498189d5e73562b4cbf6ae0ea00b10262137b50bb0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:38:18,072 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:38:18,081 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:38:18,126 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:38:18,127 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:38:18,128 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:38:18,130 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:38:18,132 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:38:18,135 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:38:18,136 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:38:18,137 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:38:18,139 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:38:18,140 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:38:18,141 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:38:18,143 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:38:18,145 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:38:18,146 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:38:18,147 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:38:18,150 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:38:18,153 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:38:18,155 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:38:18,157 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:38:18,158 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:38:18,159 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:38:18,163 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:38:18,164 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:38:18,164 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:38:18,165 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:38:18,166 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:38:18,167 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:38:18,168 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:38:18,169 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:38:18,170 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:38:18,171 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:38:18,173 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:38:18,173 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:38:18,174 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:38:18,174 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:38:18,175 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:38:18,176 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:38:18,177 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:38:18,178 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:38:18,204 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:38:18,204 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:38:18,205 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:38:18,206 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:38:18,206 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:38:18,206 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:38:18,206 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:38:18,207 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:38:18,207 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:38:18,207 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:38:18,207 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:38:18,208 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:38:18,208 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:38:18,208 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:38:18,208 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:38:18,209 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:38:18,209 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:38:18,210 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:38:18,210 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:38:18,210 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:38:18,210 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:38:18,211 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:38:18,211 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:38:18,211 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:38:18,211 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:38:18,212 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:38:18,212 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:38:18,212 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:38:18,212 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:38:18,213 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:38:18,213 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:38:18,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:38:18,213 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:38:18,214 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:38:18,214 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:38:18,214 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:38:18,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:38:18,215 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:38:18,215 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:38:18,215 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:38:18,215 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c5af94617941f44648ac9498189d5e73562b4cbf6ae0ea00b10262137b50bb0 [2021-11-12 23:38:18,479 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:38:18,512 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:38:18,516 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:38:18,518 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:38:18,519 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:38:18,520 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/email_spec11_productSimulator.cil.c [2021-11-12 23:38:18,585 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/data/fdc6a39de/c191905db7ce4cd5b5c066a2f3def440/FLAG1699626c1 [2021-11-12 23:38:19,481 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:38:19,481 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/sv-benchmarks/c/product-lines/email_spec11_productSimulator.cil.c [2021-11-12 23:38:19,512 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/data/fdc6a39de/c191905db7ce4cd5b5c066a2f3def440/FLAG1699626c1 [2021-11-12 23:38:19,571 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/data/fdc6a39de/c191905db7ce4cd5b5c066a2f3def440 [2021-11-12 23:38:19,574 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:38:19,576 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:38:19,583 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:38:19,583 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:38:19,587 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:38:19,588 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:38:19" (1/1) ... [2021-11-12 23:38:19,589 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69df16a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:19, skipping insertion in model container [2021-11-12 23:38:19,590 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:38:19" (1/1) ... [2021-11-12 23:38:19,598 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:38:19,703 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:38:20,533 WARN L228 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_41716eab-84a2-4527-9e2d-cd51bfad4937/sv-benchmarks/c/product-lines/email_spec11_productSimulator.cil.c[48047,48060] [2021-11-12 23:38:20,587 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:38:20,606 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-12 23:38:20,607 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@a171fee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:20, skipping insertion in model container [2021-11-12 23:38:20,607 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:38:20,607 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:38:20,610 INFO L158 Benchmark]: Toolchain (without parser) took 1032.47ms. Allocated memory is still 102.8MB. Free memory was 70.5MB in the beginning and 63.5MB in the end (delta: 7.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-12 23:38:20,611 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 102.8MB. Free memory is still 62.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:38:20,613 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1024.04ms. Allocated memory is still 102.8MB. Free memory was 70.2MB in the beginning and 63.5MB in the end (delta: 6.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-12 23:38:20,616 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 102.8MB. Free memory is still 62.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1024.04ms. Allocated memory is still 102.8MB. Free memory was 70.2MB in the beginning and 63.5MB in the end (delta: 6.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1155]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec11_productSimulator.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1c5af94617941f44648ac9498189d5e73562b4cbf6ae0ea00b10262137b50bb0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:38:22,929 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:38:22,931 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:38:22,976 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:38:22,977 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:38:22,978 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:38:22,980 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:38:22,982 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:38:22,984 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:38:22,986 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:38:22,987 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:38:22,988 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:38:22,989 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:38:22,990 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:38:22,992 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:38:22,993 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:38:22,995 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:38:22,996 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:38:22,998 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:38:23,001 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:38:23,003 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:38:23,004 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:38:23,006 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:38:23,007 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:38:23,010 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:38:23,011 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:38:23,011 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:38:23,013 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:38:23,013 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:38:23,014 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:38:23,015 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:38:23,016 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:38:23,017 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:38:23,018 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:38:23,019 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:38:23,019 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:38:23,020 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:38:23,021 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:38:23,021 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:38:23,022 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:38:23,023 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:38:23,024 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 23:38:23,064 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:38:23,064 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:38:23,065 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:38:23,065 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:38:23,065 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:38:23,066 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:38:23,066 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:38:23,066 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:38:23,066 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:38:23,066 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:38:23,067 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:38:23,067 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:38:23,067 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:38:23,068 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:38:23,068 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:38:23,068 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:38:23,068 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:38:23,068 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:38:23,068 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:38:23,069 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:38:23,069 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:38:23,069 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:38:23,069 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:38:23,072 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:38:23,072 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:38:23,072 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:38:23,073 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:38:23,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:38:23,074 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:38:23,074 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:38:23,074 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:38:23,074 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:38:23,074 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:38:23,074 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:38:23,075 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:38:23,075 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:38:23,076 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c5af94617941f44648ac9498189d5e73562b4cbf6ae0ea00b10262137b50bb0 [2021-11-12 23:38:23,511 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:38:23,540 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:38:23,543 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:38:23,544 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:38:23,545 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:38:23,547 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/email_spec11_productSimulator.cil.c [2021-11-12 23:38:23,613 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/data/e7cf68e6f/3d42bce48a8e44d1a138431701ad5456/FLAG8982fd1ca [2021-11-12 23:38:24,396 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:38:24,398 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/sv-benchmarks/c/product-lines/email_spec11_productSimulator.cil.c [2021-11-12 23:38:24,432 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/data/e7cf68e6f/3d42bce48a8e44d1a138431701ad5456/FLAG8982fd1ca [2021-11-12 23:38:24,525 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/data/e7cf68e6f/3d42bce48a8e44d1a138431701ad5456 [2021-11-12 23:38:24,530 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:38:24,532 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:38:24,536 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:38:24,536 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:38:24,540 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:38:24,541 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:38:24" (1/1) ... [2021-11-12 23:38:24,543 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a7cf5d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:24, skipping insertion in model container [2021-11-12 23:38:24,543 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:38:24" (1/1) ... [2021-11-12 23:38:24,551 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:38:24,651 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:38:25,557 WARN L228 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_41716eab-84a2-4527-9e2d-cd51bfad4937/sv-benchmarks/c/product-lines/email_spec11_productSimulator.cil.c[48047,48060] [2021-11-12 23:38:25,643 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:38:25,662 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:38:25,689 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:38:25,809 WARN L228 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_41716eab-84a2-4527-9e2d-cd51bfad4937/sv-benchmarks/c/product-lines/email_spec11_productSimulator.cil.c[48047,48060] [2021-11-12 23:38:25,841 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:38:25,847 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:38:25,904 WARN L228 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_41716eab-84a2-4527-9e2d-cd51bfad4937/sv-benchmarks/c/product-lines/email_spec11_productSimulator.cil.c[48047,48060] [2021-11-12 23:38:25,929 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:38:25,971 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:38:25,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:25 WrapperNode [2021-11-12 23:38:25,972 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:38:25,973 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:38:25,973 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:38:25,973 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:38:25,980 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:25" (1/1) ... [2021-11-12 23:38:26,028 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:25" (1/1) ... [2021-11-12 23:38:26,131 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:38:26,132 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:38:26,133 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:38:26,133 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:38:26,142 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:25" (1/1) ... [2021-11-12 23:38:26,142 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:25" (1/1) ... [2021-11-12 23:38:26,162 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:25" (1/1) ... [2021-11-12 23:38:26,163 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:25" (1/1) ... [2021-11-12 23:38:26,219 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:25" (1/1) ... [2021-11-12 23:38:26,245 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:25" (1/1) ... [2021-11-12 23:38:26,253 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:25" (1/1) ... [2021-11-12 23:38:26,265 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:38:26,271 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:38:26,271 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:38:26,272 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:38:26,272 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:25" (1/1) ... [2021-11-12 23:38:26,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:38:26,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:38:26,307 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:38:26,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:38:26,366 INFO L130 BoogieDeclarations]: Found specification of procedure getClientPrivateKey [2021-11-12 23:38:26,366 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientPrivateKey [2021-11-12 23:38:26,366 INFO L130 BoogieDeclarations]: Found specification of procedure setup_chuck__before__Keys [2021-11-12 23:38:26,367 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_chuck__before__Keys [2021-11-12 23:38:26,367 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing__before__Sign [2021-11-12 23:38:26,367 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing__before__Sign [2021-11-12 23:38:26,367 INFO L130 BoogieDeclarations]: Found specification of procedure getClientAddressBookSize [2021-11-12 23:38:26,367 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientAddressBookSize [2021-11-12 23:38:26,367 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailEncryptionKey [2021-11-12 23:38:26,367 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailEncryptionKey [2021-11-12 23:38:26,368 INFO L130 BoogieDeclarations]: Found specification of procedure setClientAddressBookAddress [2021-11-12 23:38:26,368 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientAddressBookAddress [2021-11-12 23:38:26,368 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailEncryptionKey [2021-11-12 23:38:26,368 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailEncryptionKey [2021-11-12 23:38:26,368 INFO L130 BoogieDeclarations]: Found specification of procedure printMail__before__Verify [2021-11-12 23:38:26,368 INFO L138 BoogieDeclarations]: Found implementation of procedure printMail__before__Verify [2021-11-12 23:38:26,368 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2021-11-12 23:38:26,369 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2021-11-12 23:38:26,369 INFO L130 BoogieDeclarations]: Found specification of procedure setup_bob__before__Keys [2021-11-12 23:38:26,369 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_bob__before__Keys [2021-11-12 23:38:26,369 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2021-11-12 23:38:26,369 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2021-11-12 23:38:26,369 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable [2021-11-12 23:38:26,369 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable [2021-11-12 23:38:26,369 INFO L130 BoogieDeclarations]: Found specification of procedure createClientKeyringEntry [2021-11-12 23:38:26,370 INFO L138 BoogieDeclarations]: Found implementation of procedure createClientKeyringEntry [2021-11-12 23:38:26,370 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__Decrypt [2021-11-12 23:38:26,370 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__Decrypt [2021-11-12 23:38:26,370 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing__before__Encrypt [2021-11-12 23:38:26,370 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing__before__Encrypt [2021-11-12 23:38:26,371 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailIsEncrypted [2021-11-12 23:38:26,371 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailIsEncrypted [2021-11-12 23:38:26,371 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailSignKey [2021-11-12 23:38:26,371 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailSignKey [2021-11-12 23:38:26,372 INFO L130 BoogieDeclarations]: Found specification of procedure chuckKeyAdd [2021-11-12 23:38:26,372 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckKeyAdd [2021-11-12 23:38:26,372 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-12 23:38:26,372 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__Forward [2021-11-12 23:38:26,372 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__Forward [2021-11-12 23:38:26,372 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailFrom [2021-11-12 23:38:26,372 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailFrom [2021-11-12 23:38:26,372 INFO L130 BoogieDeclarations]: Found specification of procedure queue [2021-11-12 23:38:26,373 INFO L138 BoogieDeclarations]: Found implementation of procedure queue [2021-11-12 23:38:26,373 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2021-11-12 23:38:26,373 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2021-11-12 23:38:26,373 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable__before__Encrypt [2021-11-12 23:38:26,373 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable__before__Encrypt [2021-11-12 23:38:26,373 INFO L130 BoogieDeclarations]: Found specification of procedure isSigned [2021-11-12 23:38:26,374 INFO L138 BoogieDeclarations]: Found implementation of procedure isSigned [2021-11-12 23:38:26,374 INFO L130 BoogieDeclarations]: Found specification of procedure isKeyPairValid [2021-11-12 23:38:26,375 INFO L138 BoogieDeclarations]: Found implementation of procedure isKeyPairValid [2021-11-12 23:38:26,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:38:26,376 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing__before__AddressBook [2021-11-12 23:38:26,376 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing__before__AddressBook [2021-11-12 23:38:26,376 INFO L130 BoogieDeclarations]: Found specification of procedure printMail__before__Encrypt [2021-11-12 23:38:26,376 INFO L138 BoogieDeclarations]: Found implementation of procedure printMail__before__Encrypt [2021-11-12 23:38:26,377 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__AutoResponder [2021-11-12 23:38:26,377 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__AutoResponder [2021-11-12 23:38:26,377 INFO L130 BoogieDeclarations]: Found specification of procedure setClientAddressBookSize [2021-11-12 23:38:26,377 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientAddressBookSize [2021-11-12 23:38:26,377 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringUser [2021-11-12 23:38:26,377 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringUser [2021-11-12 23:38:26,378 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringPublicKey [2021-11-12 23:38:26,378 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringPublicKey [2021-11-12 23:38:26,378 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2021-11-12 23:38:26,378 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2021-11-12 23:38:26,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:38:26,378 INFO L130 BoogieDeclarations]: Found specification of procedure findPublicKey [2021-11-12 23:38:26,378 INFO L138 BoogieDeclarations]: Found implementation of procedure findPublicKey [2021-11-12 23:38:26,378 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2021-11-12 23:38:26,379 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2021-11-12 23:38:26,379 INFO L130 BoogieDeclarations]: Found specification of procedure isEncrypted [2021-11-12 23:38:26,380 INFO L138 BoogieDeclarations]: Found implementation of procedure isEncrypted [2021-11-12 23:38:26,380 INFO L130 BoogieDeclarations]: Found specification of procedure setup_rjh__before__Keys [2021-11-12 23:38:26,380 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_rjh__before__Keys [2021-11-12 23:38:26,380 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__Verify [2021-11-12 23:38:26,380 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__Verify [2021-11-12 23:38:26,380 INFO L130 BoogieDeclarations]: Found specification of procedure setClientPrivateKey [2021-11-12 23:38:26,380 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientPrivateKey [2021-11-12 23:38:26,381 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailTo [2021-11-12 23:38:26,381 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailTo [2021-11-12 23:38:26,381 INFO L130 BoogieDeclarations]: Found specification of procedure generateKeyPair [2021-11-12 23:38:26,381 INFO L138 BoogieDeclarations]: Found implementation of procedure generateKeyPair [2021-11-12 23:38:26,381 INFO L130 BoogieDeclarations]: Found specification of procedure printMail__before__Sign [2021-11-12 23:38:26,381 INFO L138 BoogieDeclarations]: Found implementation of procedure printMail__before__Sign [2021-11-12 23:38:26,382 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2021-11-12 23:38:26,382 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2021-11-12 23:38:26,382 INFO L130 BoogieDeclarations]: Found specification of procedure getClientAddressBookAddress [2021-11-12 23:38:26,382 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientAddressBookAddress [2021-11-12 23:38:26,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:38:26,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:38:30,680 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:38:30,681 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 23:38:30,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:38:30 BoogieIcfgContainer [2021-11-12 23:38:30,685 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:38:30,687 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:38:30,687 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:38:30,691 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:38:30,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:38:24" (1/3) ... [2021-11-12 23:38:30,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@613d351b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:38:30, skipping insertion in model container [2021-11-12 23:38:30,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:25" (2/3) ... [2021-11-12 23:38:30,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@613d351b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:38:30, skipping insertion in model container [2021-11-12 23:38:30,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:38:30" (3/3) ... [2021-11-12 23:38:30,695 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec11_productSimulator.cil.c [2021-11-12 23:38:30,701 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:38:30,701 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:38:30,763 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:38:30,771 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=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 23:38:30,771 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:38:30,810 INFO L276 IsEmpty]: Start isEmpty. Operand has 600 states, 446 states have (on average 1.515695067264574) internal successors, (676), 466 states have internal predecessors, (676), 109 states have call successors, (109), 43 states have call predecessors, (109), 43 states have return successors, (109), 108 states have call predecessors, (109), 109 states have call successors, (109) [2021-11-12 23:38:30,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-12 23:38:30,869 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:30,871 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:30,871 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:30,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:30,880 INFO L85 PathProgramCache]: Analyzing trace with hash -2015100890, now seen corresponding path program 1 times [2021-11-12 23:38:30,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:30,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1813711150] [2021-11-12 23:38:30,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:30,902 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:30,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:30,916 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:30,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:38:31,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:31,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 23:38:31,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:31,977 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-12 23:38:31,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:32,374 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-12 23:38:32,374 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:32,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1813711150] [2021-11-12 23:38:32,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1813711150] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:38:32,376 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:38:32,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 23:38:32,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897294106] [2021-11-12 23:38:32,378 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:32,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 23:38:32,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:32,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 23:38:32,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:38:32,415 INFO L87 Difference]: Start difference. First operand has 600 states, 446 states have (on average 1.515695067264574) internal successors, (676), 466 states have internal predecessors, (676), 109 states have call successors, (109), 43 states have call predecessors, (109), 43 states have return successors, (109), 108 states have call predecessors, (109), 109 states have call successors, (109) Second operand has 2 states, 2 states have (on average 50.5) internal successors, (101), 2 states have internal predecessors, (101), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-12 23:38:32,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:32,493 INFO L93 Difference]: Finished difference Result 931 states and 1373 transitions. [2021-11-12 23:38:32,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 23:38:32,495 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 50.5) internal successors, (101), 2 states have internal predecessors, (101), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 156 [2021-11-12 23:38:32,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:32,517 INFO L225 Difference]: With dead ends: 931 [2021-11-12 23:38:32,517 INFO L226 Difference]: Without dead ends: 593 [2021-11-12 23:38:32,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:38:32,532 INFO L933 BasicCegarLoop]: 890 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 890 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.30ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:32,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 6.30ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 23:38:32,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-11-12 23:38:32,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 593. [2021-11-12 23:38:32,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 440 states have (on average 1.5113636363636365) internal successors, (665), 459 states have internal predecessors, (665), 109 states have call successors, (109), 43 states have call predecessors, (109), 43 states have return successors, (108), 107 states have call predecessors, (108), 108 states have call successors, (108) [2021-11-12 23:38:32,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 882 transitions. [2021-11-12 23:38:32,670 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 882 transitions. Word has length 156 [2021-11-12 23:38:32,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:32,671 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 882 transitions. [2021-11-12 23:38:32,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 50.5) internal successors, (101), 2 states have internal predecessors, (101), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-12 23:38:32,672 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 882 transitions. [2021-11-12 23:38:32,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-12 23:38:32,683 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:32,683 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:32,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:32,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:38:32,902 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:32,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:32,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1644639793, now seen corresponding path program 1 times [2021-11-12 23:38:32,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:32,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1644890400] [2021-11-12 23:38:32,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:32,905 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:32,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:32,906 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:32,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:38:33,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:33,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:38:33,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:33,925 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-12 23:38:33,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:34,255 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-12 23:38:34,256 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:34,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1644890400] [2021-11-12 23:38:34,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1644890400] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:38:34,258 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:38:34,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-12 23:38:34,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251593170] [2021-11-12 23:38:34,264 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:34,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:38:34,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:34,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:38:34,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:38:34,269 INFO L87 Difference]: Start difference. First operand 593 states and 882 transitions. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 2 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-12 23:38:34,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:34,419 INFO L93 Difference]: Finished difference Result 1150 states and 1708 transitions. [2021-11-12 23:38:34,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:38:34,419 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 2 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) Word has length 157 [2021-11-12 23:38:34,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:34,427 INFO L225 Difference]: With dead ends: 1150 [2021-11-12 23:38:34,427 INFO L226 Difference]: Without dead ends: 593 [2021-11-12 23:38:34,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:38:34,429 INFO L933 BasicCegarLoop]: 880 mSDtfsCounter, 3 mSDsluCounter, 2629 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 3509 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.24ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.61ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:34,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 3509 Invalid, 18 Unknown, 0 Unchecked, 22.24ms Time], IncrementalHoareTripleChecker [6 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 20.61ms Time] [2021-11-12 23:38:34,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-11-12 23:38:34,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 593. [2021-11-12 23:38:34,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 440 states have (on average 1.4954545454545454) internal successors, (658), 459 states have internal predecessors, (658), 109 states have call successors, (109), 43 states have call predecessors, (109), 43 states have return successors, (108), 107 states have call predecessors, (108), 108 states have call successors, (108) [2021-11-12 23:38:34,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 875 transitions. [2021-11-12 23:38:34,476 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 875 transitions. Word has length 157 [2021-11-12 23:38:34,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:34,477 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 875 transitions. [2021-11-12 23:38:34,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 2 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-12 23:38:34,478 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 875 transitions. [2021-11-12 23:38:34,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-12 23:38:34,486 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:34,486 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:34,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:34,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:38:34,705 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:34,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:34,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1683806924, now seen corresponding path program 1 times [2021-11-12 23:38:34,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:34,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [71991355] [2021-11-12 23:38:34,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:34,708 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:34,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:34,710 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:34,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:38:35,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:35,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:38:35,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:35,603 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-11-12 23:38:35,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:36,185 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-12 23:38:36,185 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:36,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [71991355] [2021-11-12 23:38:36,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [71991355] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:38:36,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:38:36,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2021-11-12 23:38:36,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488833167] [2021-11-12 23:38:36,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:36,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:38:36,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:36,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:38:36,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:38:36,189 INFO L87 Difference]: Start difference. First operand 593 states and 875 transitions. Second operand has 7 states, 6 states have (on average 15.833333333333334) internal successors, (95), 7 states have internal predecessors, (95), 4 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (21), 3 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-12 23:38:36,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:36,372 INFO L93 Difference]: Finished difference Result 1132 states and 1678 transitions. [2021-11-12 23:38:36,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:38:36,373 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 15.833333333333334) internal successors, (95), 7 states have internal predecessors, (95), 4 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (21), 3 states have call predecessors, (21), 4 states have call successors, (21) Word has length 162 [2021-11-12 23:38:36,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:36,379 INFO L225 Difference]: With dead ends: 1132 [2021-11-12 23:38:36,379 INFO L226 Difference]: Without dead ends: 597 [2021-11-12 23:38:36,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:38:36,383 INFO L933 BasicCegarLoop]: 863 mSDtfsCounter, 196 mSDsluCounter, 4090 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 78.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 4953 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.16ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 90.82ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:36,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 4953 Invalid, 73 Unknown, 0 Unchecked, 17.16ms Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 90.82ms Time] [2021-11-12 23:38:36,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-11-12 23:38:36,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 597. [2021-11-12 23:38:36,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 442 states have (on average 1.493212669683258) internal successors, (660), 462 states have internal predecessors, (660), 109 states have call successors, (109), 43 states have call predecessors, (109), 45 states have return successors, (112), 108 states have call predecessors, (112), 108 states have call successors, (112) [2021-11-12 23:38:36,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 881 transitions. [2021-11-12 23:38:36,416 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 881 transitions. Word has length 162 [2021-11-12 23:38:36,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:36,416 INFO L470 AbstractCegarLoop]: Abstraction has 597 states and 881 transitions. [2021-11-12 23:38:36,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 15.833333333333334) internal successors, (95), 7 states have internal predecessors, (95), 4 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (21), 3 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-12 23:38:36,417 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 881 transitions. [2021-11-12 23:38:36,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-12 23:38:36,422 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:36,422 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:36,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:36,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:38:36,643 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:36,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:36,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1511105544, now seen corresponding path program 1 times [2021-11-12 23:38:36,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:36,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1862385478] [2021-11-12 23:38:36,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:36,645 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:36,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:36,647 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:36,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:38:37,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:37,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 834 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:38:37,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:37,564 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-12 23:38:37,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:38,085 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-12 23:38:38,085 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:38,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1862385478] [2021-11-12 23:38:38,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1862385478] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:38:38,086 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:38:38,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-12 23:38:38,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068569524] [2021-11-12 23:38:38,086 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:38,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:38:38,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:38,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:38:38,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:38:38,089 INFO L87 Difference]: Start difference. First operand 597 states and 881 transitions. Second operand has 10 states, 8 states have (on average 14.625) internal successors, (117), 10 states have internal predecessors, (117), 6 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (30), 3 states have call predecessors, (30), 6 states have call successors, (30) [2021-11-12 23:38:38,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:38,341 INFO L93 Difference]: Finished difference Result 1118 states and 1658 transitions. [2021-11-12 23:38:38,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:38:38,342 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 14.625) internal successors, (117), 10 states have internal predecessors, (117), 6 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (30), 3 states have call predecessors, (30), 6 states have call successors, (30) Word has length 163 [2021-11-12 23:38:38,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:38,351 INFO L225 Difference]: With dead ends: 1118 [2021-11-12 23:38:38,352 INFO L226 Difference]: Without dead ends: 599 [2021-11-12 23:38:38,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:38:38,362 INFO L933 BasicCegarLoop]: 863 mSDtfsCounter, 384 mSDsluCounter, 3239 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 129.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 4102 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.33ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 152.02ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:38,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [408 Valid, 4102 Invalid, 88 Unknown, 0 Unchecked, 12.33ms Time], IncrementalHoareTripleChecker [24 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 152.02ms Time] [2021-11-12 23:38:38,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-11-12 23:38:38,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 599. [2021-11-12 23:38:38,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 443 states have (on average 1.492099322799097) internal successors, (661), 463 states have internal predecessors, (661), 109 states have call successors, (109), 43 states have call predecessors, (109), 46 states have return successors, (113), 109 states have call predecessors, (113), 108 states have call successors, (113) [2021-11-12 23:38:38,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 883 transitions. [2021-11-12 23:38:38,431 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 883 transitions. Word has length 163 [2021-11-12 23:38:38,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:38,432 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 883 transitions. [2021-11-12 23:38:38,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 14.625) internal successors, (117), 10 states have internal predecessors, (117), 6 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (30), 3 states have call predecessors, (30), 6 states have call successors, (30) [2021-11-12 23:38:38,432 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 883 transitions. [2021-11-12 23:38:38,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-12 23:38:38,438 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:38,438 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:38,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:38,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:38:38,654 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:38,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:38,655 INFO L85 PathProgramCache]: Analyzing trace with hash -123130025, now seen corresponding path program 1 times [2021-11-12 23:38:38,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:38,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [160812294] [2021-11-12 23:38:38,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:38,656 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:38,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:38,658 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:38,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:38:39,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:39,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 831 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:38:39,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:39,626 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-12 23:38:39,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:40,155 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-12 23:38:40,155 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:40,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [160812294] [2021-11-12 23:38:40,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [160812294] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:38:40,155 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:38:40,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-12 23:38:40,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081202321] [2021-11-12 23:38:40,156 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:40,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:38:40,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:40,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:38:40,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:38:40,158 INFO L87 Difference]: Start difference. First operand 599 states and 883 transitions. Second operand has 10 states, 8 states have (on average 14.875) internal successors, (119), 10 states have internal predecessors, (119), 6 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (30), 3 states have call predecessors, (30), 6 states have call successors, (30) [2021-11-12 23:38:40,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:40,402 INFO L93 Difference]: Finished difference Result 1122 states and 1664 transitions. [2021-11-12 23:38:40,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:38:40,403 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 14.875) internal successors, (119), 10 states have internal predecessors, (119), 6 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (30), 3 states have call predecessors, (30), 6 states have call successors, (30) Word has length 164 [2021-11-12 23:38:40,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:40,408 INFO L225 Difference]: With dead ends: 1122 [2021-11-12 23:38:40,408 INFO L226 Difference]: Without dead ends: 603 [2021-11-12 23:38:40,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:38:40,412 INFO L933 BasicCegarLoop]: 865 mSDtfsCounter, 190 mSDsluCounter, 3906 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 115.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 4771 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.35ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 130.35ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:40,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 4771 Invalid, 91 Unknown, 0 Unchecked, 12.35ms Time], IncrementalHoareTripleChecker [1 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 130.35ms Time] [2021-11-12 23:38:40,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2021-11-12 23:38:40,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 601. [2021-11-12 23:38:40,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 444 states have (on average 1.490990990990991) internal successors, (662), 465 states have internal predecessors, (662), 109 states have call successors, (109), 43 states have call predecessors, (109), 47 states have return successors, (116), 109 states have call predecessors, (116), 108 states have call successors, (116) [2021-11-12 23:38:40,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 887 transitions. [2021-11-12 23:38:40,444 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 887 transitions. Word has length 164 [2021-11-12 23:38:40,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:40,446 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 887 transitions. [2021-11-12 23:38:40,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 14.875) internal successors, (119), 10 states have internal predecessors, (119), 6 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (30), 3 states have call predecessors, (30), 6 states have call successors, (30) [2021-11-12 23:38:40,448 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 887 transitions. [2021-11-12 23:38:40,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-12 23:38:40,454 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:40,455 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:40,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:40,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:38:40,675 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:40,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:40,676 INFO L85 PathProgramCache]: Analyzing trace with hash -153684035, now seen corresponding path program 1 times [2021-11-12 23:38:40,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:40,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1791301919] [2021-11-12 23:38:40,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:40,677 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:40,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:40,680 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:40,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:38:41,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:41,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 836 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:38:41,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:41,559 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-12 23:38:41,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:41,867 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-12 23:38:41,868 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:41,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1791301919] [2021-11-12 23:38:41,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1791301919] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:38:41,868 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:38:41,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 23:38:41,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564414998] [2021-11-12 23:38:41,868 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:41,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:38:41,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:41,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:38:41,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:38:41,870 INFO L87 Difference]: Start difference. First operand 601 states and 887 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-12 23:38:41,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:41,997 INFO L93 Difference]: Finished difference Result 1055 states and 1559 transitions. [2021-11-12 23:38:41,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:38:41,999 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 165 [2021-11-12 23:38:41,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:42,005 INFO L225 Difference]: With dead ends: 1055 [2021-11-12 23:38:42,005 INFO L226 Difference]: Without dead ends: 730 [2021-11-12 23:38:42,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:38:42,011 INFO L933 BasicCegarLoop]: 898 mSDtfsCounter, 176 mSDsluCounter, 1751 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 69.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 2649 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.51ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 79.73ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:42,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 2649 Invalid, 27 Unknown, 0 Unchecked, 6.51ms Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 79.73ms Time] [2021-11-12 23:38:42,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2021-11-12 23:38:42,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 722. [2021-11-12 23:38:42,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 548 states have (on average 1.5237226277372262) internal successors, (835), 571 states have internal predecessors, (835), 126 states have call successors, (126), 43 states have call predecessors, (126), 47 states have return successors, (133), 126 states have call predecessors, (133), 125 states have call successors, (133) [2021-11-12 23:38:42,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 1094 transitions. [2021-11-12 23:38:42,067 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 1094 transitions. Word has length 165 [2021-11-12 23:38:42,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:42,067 INFO L470 AbstractCegarLoop]: Abstraction has 722 states and 1094 transitions. [2021-11-12 23:38:42,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-12 23:38:42,068 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 1094 transitions. [2021-11-12 23:38:42,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-12 23:38:42,073 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:42,073 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:42,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:42,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:38:42,292 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:42,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:42,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1880528848, now seen corresponding path program 1 times [2021-11-12 23:38:42,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:42,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [425010763] [2021-11-12 23:38:42,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:42,294 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:42,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:42,295 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:42,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:38:42,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:42,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 844 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:38:42,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:43,167 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-12 23:38:43,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:43,548 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-12 23:38:43,548 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:43,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [425010763] [2021-11-12 23:38:43,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [425010763] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:38:43,548 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:38:43,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:38:43,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159356891] [2021-11-12 23:38:43,549 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:43,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:38:43,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:43,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:38:43,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:38:43,551 INFO L87 Difference]: Start difference. First operand 722 states and 1094 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-12 23:38:43,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:43,647 INFO L93 Difference]: Finished difference Result 1427 states and 2181 transitions. [2021-11-12 23:38:43,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:38:43,647 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 177 [2021-11-12 23:38:43,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:43,655 INFO L225 Difference]: With dead ends: 1427 [2021-11-12 23:38:43,656 INFO L226 Difference]: Without dead ends: 822 [2021-11-12 23:38:43,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:38:43,660 INFO L933 BasicCegarLoop]: 895 mSDtfsCounter, 173 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 1720 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.17ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.23ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:43,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 1720 Invalid, 4 Unknown, 0 Unchecked, 10.17ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 13.23ms Time] [2021-11-12 23:38:43,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2021-11-12 23:38:43,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 814. [2021-11-12 23:38:43,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 626 states have (on average 1.535143769968051) internal successors, (961), 651 states have internal predecessors, (961), 140 states have call successors, (140), 43 states have call predecessors, (140), 47 states have return successors, (147), 140 states have call predecessors, (147), 139 states have call successors, (147) [2021-11-12 23:38:43,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1248 transitions. [2021-11-12 23:38:43,748 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1248 transitions. Word has length 177 [2021-11-12 23:38:43,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:43,750 INFO L470 AbstractCegarLoop]: Abstraction has 814 states and 1248 transitions. [2021-11-12 23:38:43,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-12 23:38:43,750 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1248 transitions. [2021-11-12 23:38:43,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-12 23:38:43,756 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:43,757 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:43,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:43,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:38:43,970 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:43,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:43,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1123450082, now seen corresponding path program 1 times [2021-11-12 23:38:43,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:43,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [525128608] [2021-11-12 23:38:43,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:43,972 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:43,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:43,973 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:43,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:38:44,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:44,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:38:44,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:44,880 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-12 23:38:44,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:45,283 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-12 23:38:45,283 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:45,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [525128608] [2021-11-12 23:38:45,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [525128608] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:38:45,285 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:38:45,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:38:45,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808748451] [2021-11-12 23:38:45,286 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:45,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:38:45,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:45,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:38:45,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:38:45,288 INFO L87 Difference]: Start difference. First operand 814 states and 1248 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-12 23:38:45,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:45,365 INFO L93 Difference]: Finished difference Result 1703 states and 2652 transitions. [2021-11-12 23:38:45,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:38:45,366 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 178 [2021-11-12 23:38:45,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:45,375 INFO L225 Difference]: With dead ends: 1703 [2021-11-12 23:38:45,376 INFO L226 Difference]: Without dead ends: 1017 [2021-11-12 23:38:45,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:38:45,380 INFO L933 BasicCegarLoop]: 895 mSDtfsCounter, 171 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 1755 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.79ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.30ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:45,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 1755 Invalid, 4 Unknown, 0 Unchecked, 5.79ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 5.30ms Time] [2021-11-12 23:38:45,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2021-11-12 23:38:45,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 1009. [2021-11-12 23:38:45,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 790 states have (on average 1.558227848101266) internal successors, (1231), 819 states have internal predecessors, (1231), 171 states have call successors, (171), 43 states have call predecessors, (171), 47 states have return successors, (178), 171 states have call predecessors, (178), 170 states have call successors, (178) [2021-11-12 23:38:45,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 1580 transitions. [2021-11-12 23:38:45,481 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 1580 transitions. Word has length 178 [2021-11-12 23:38:45,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:45,482 INFO L470 AbstractCegarLoop]: Abstraction has 1009 states and 1580 transitions. [2021-11-12 23:38:45,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-12 23:38:45,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 1580 transitions. [2021-11-12 23:38:45,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-12 23:38:45,491 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:45,492 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:45,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:45,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:38:45,706 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:45,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:45,707 INFO L85 PathProgramCache]: Analyzing trace with hash 590542485, now seen corresponding path program 1 times [2021-11-12 23:38:45,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:45,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2129717981] [2021-11-12 23:38:45,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:45,708 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:45,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:45,709 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:45,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:38:46,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:46,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:38:46,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:46,588 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-12 23:38:46,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:46,922 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-12 23:38:46,922 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:46,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2129717981] [2021-11-12 23:38:46,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2129717981] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:38:46,922 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:38:46,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:38:46,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874594370] [2021-11-12 23:38:46,923 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:46,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:38:46,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:46,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:38:46,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:38:46,925 INFO L87 Difference]: Start difference. First operand 1009 states and 1580 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-12 23:38:47,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:47,048 INFO L93 Difference]: Finished difference Result 2274 states and 3630 transitions. [2021-11-12 23:38:47,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:38:47,049 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 179 [2021-11-12 23:38:47,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:47,060 INFO L225 Difference]: With dead ends: 2274 [2021-11-12 23:38:47,061 INFO L226 Difference]: Without dead ends: 1401 [2021-11-12 23:38:47,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:38:47,067 INFO L933 BasicCegarLoop]: 899 mSDtfsCounter, 169 mSDsluCounter, 867 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 1766 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.71ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.90ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:47,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 1766 Invalid, 4 Unknown, 0 Unchecked, 6.71ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 23.90ms Time] [2021-11-12 23:38:47,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2021-11-12 23:38:47,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 1393. [2021-11-12 23:38:47,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1393 states, 1116 states have (on average 1.586021505376344) internal successors, (1770), 1153 states have internal predecessors, (1770), 229 states have call successors, (229), 43 states have call predecessors, (229), 47 states have return successors, (236), 229 states have call predecessors, (236), 228 states have call successors, (236) [2021-11-12 23:38:47,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 2235 transitions. [2021-11-12 23:38:47,176 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 2235 transitions. Word has length 179 [2021-11-12 23:38:47,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:47,177 INFO L470 AbstractCegarLoop]: Abstraction has 1393 states and 2235 transitions. [2021-11-12 23:38:47,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-12 23:38:47,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 2235 transitions. [2021-11-12 23:38:47,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-12 23:38:47,187 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:47,187 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:47,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:47,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:38:47,407 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:47,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:47,408 INFO L85 PathProgramCache]: Analyzing trace with hash 2138147086, now seen corresponding path program 1 times [2021-11-12 23:38:47,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:47,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [487626695] [2021-11-12 23:38:47,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:47,408 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:47,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:47,409 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:47,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 23:38:47,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:47,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:38:47,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:48,205 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-12 23:38:48,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:48,560 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-12 23:38:48,561 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:48,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [487626695] [2021-11-12 23:38:48,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [487626695] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:38:48,561 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:38:48,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 23:38:48,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396572582] [2021-11-12 23:38:48,561 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:48,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:38:48,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:48,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:38:48,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:38:48,563 INFO L87 Difference]: Start difference. First operand 1393 states and 2235 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-12 23:38:48,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:48,703 INFO L93 Difference]: Finished difference Result 2583 states and 4154 transitions. [2021-11-12 23:38:48,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:38:48,704 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 179 [2021-11-12 23:38:48,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:48,715 INFO L225 Difference]: With dead ends: 2583 [2021-11-12 23:38:48,715 INFO L226 Difference]: Without dead ends: 1401 [2021-11-12 23:38:48,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:38:48,721 INFO L933 BasicCegarLoop]: 1026 mSDtfsCounter, 128 mSDsluCounter, 1772 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 2798 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.44ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.56ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:48,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 2798 Invalid, 5 Unknown, 0 Unchecked, 7.44ms Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 19.56ms Time] [2021-11-12 23:38:48,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2021-11-12 23:38:48,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 1393. [2021-11-12 23:38:48,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1393 states, 1116 states have (on average 1.582437275985663) internal successors, (1766), 1153 states have internal predecessors, (1766), 229 states have call successors, (229), 43 states have call predecessors, (229), 47 states have return successors, (236), 229 states have call predecessors, (236), 228 states have call successors, (236) [2021-11-12 23:38:48,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 2231 transitions. [2021-11-12 23:38:48,817 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 2231 transitions. Word has length 179 [2021-11-12 23:38:48,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:48,818 INFO L470 AbstractCegarLoop]: Abstraction has 1393 states and 2231 transitions. [2021-11-12 23:38:48,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-12 23:38:48,818 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 2231 transitions. [2021-11-12 23:38:48,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-12 23:38:48,828 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:48,829 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:48,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:49,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:38:49,050 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:49,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:49,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1986337367, now seen corresponding path program 1 times [2021-11-12 23:38:49,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:49,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1077726717] [2021-11-12 23:38:49,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:49,051 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:49,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:49,053 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:49,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:38:49,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:49,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 850 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:38:49,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:49,911 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-12 23:38:49,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:50,308 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-12 23:38:50,308 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:50,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1077726717] [2021-11-12 23:38:50,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1077726717] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:38:50,308 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:38:50,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:38:50,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589248709] [2021-11-12 23:38:50,309 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:50,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:38:50,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:50,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:38:50,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:38:50,310 INFO L87 Difference]: Start difference. First operand 1393 states and 2231 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-12 23:38:50,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:50,448 INFO L93 Difference]: Finished difference Result 3369 states and 5494 transitions. [2021-11-12 23:38:50,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:38:50,449 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 180 [2021-11-12 23:38:50,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:50,470 INFO L225 Difference]: With dead ends: 3369 [2021-11-12 23:38:50,471 INFO L226 Difference]: Without dead ends: 2123 [2021-11-12 23:38:50,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 357 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:38:50,477 INFO L933 BasicCegarLoop]: 892 mSDtfsCounter, 167 mSDsluCounter, 863 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 1755 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.59ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.63ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:50,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 1755 Invalid, 4 Unknown, 0 Unchecked, 4.59ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 6.63ms Time] [2021-11-12 23:38:50,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2021-11-12 23:38:50,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 2115. [2021-11-12 23:38:50,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2115 states, 1742 states have (on average 1.6090700344431688) internal successors, (2803), 1795 states have internal predecessors, (2803), 325 states have call successors, (325), 43 states have call predecessors, (325), 47 states have return successors, (332), 325 states have call predecessors, (332), 324 states have call successors, (332) [2021-11-12 23:38:50,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2115 states to 2115 states and 3460 transitions. [2021-11-12 23:38:50,622 INFO L78 Accepts]: Start accepts. Automaton has 2115 states and 3460 transitions. Word has length 180 [2021-11-12 23:38:50,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:50,626 INFO L470 AbstractCegarLoop]: Abstraction has 2115 states and 3460 transitions. [2021-11-12 23:38:50,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-12 23:38:50,626 INFO L276 IsEmpty]: Start isEmpty. Operand 2115 states and 3460 transitions. [2021-11-12 23:38:50,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-12 23:38:50,640 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:50,640 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:50,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:50,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:38:50,860 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:50,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:50,861 INFO L85 PathProgramCache]: Analyzing trace with hash -516442741, now seen corresponding path program 1 times [2021-11-12 23:38:50,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:50,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [767506480] [2021-11-12 23:38:50,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:50,862 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:50,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:50,863 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:50,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:38:51,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:51,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:38:51,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:51,814 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-12 23:38:51,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:52,205 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-12 23:38:52,205 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:52,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [767506480] [2021-11-12 23:38:52,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [767506480] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:38:52,206 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:38:52,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 23:38:52,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801092432] [2021-11-12 23:38:52,206 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:52,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:38:52,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:52,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:38:52,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:38:52,208 INFO L87 Difference]: Start difference. First operand 2115 states and 3460 transitions. Second operand has 4 states, 4 states have (on average 43.25) internal successors, (173), 4 states have internal predecessors, (173), 4 states have call successors, (47), 3 states have call predecessors, (47), 3 states have return successors, (39), 4 states have call predecessors, (39), 4 states have call successors, (39) [2021-11-12 23:38:54,242 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:38:54,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:54,749 INFO L93 Difference]: Finished difference Result 4022 states and 6613 transitions. [2021-11-12 23:38:54,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:38:54,750 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.25) internal successors, (173), 4 states have internal predecessors, (173), 4 states have call successors, (47), 3 states have call predecessors, (47), 3 states have return successors, (39), 4 states have call predecessors, (39), 4 states have call successors, (39) Word has length 180 [2021-11-12 23:38:54,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:54,766 INFO L225 Difference]: With dead ends: 4022 [2021-11-12 23:38:54,767 INFO L226 Difference]: Without dead ends: 2117 [2021-11-12 23:38:54,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 356 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:38:54,775 INFO L933 BasicCegarLoop]: 871 mSDtfsCounter, 1406 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 202 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2297.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1406 SdHoareTripleChecker+Valid, 883 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.03ms SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2370.43ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:54,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1406 Valid, 883 Invalid, 205 Unknown, 0 Unchecked, 7.03ms Time], IncrementalHoareTripleChecker [202 Valid, 2 Invalid, 1 Unknown, 0 Unchecked, 2370.43ms Time] [2021-11-12 23:38:54,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2117 states. [2021-11-12 23:38:54,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2117 to 2117. [2021-11-12 23:38:54,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2117 states, 1744 states have (on average 1.602637614678899) internal successors, (2795), 1796 states have internal predecessors, (2795), 324 states have call successors, (324), 44 states have call predecessors, (324), 48 states have return successors, (331), 324 states have call predecessors, (331), 323 states have call successors, (331) [2021-11-12 23:38:54,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2117 states to 2117 states and 3450 transitions. [2021-11-12 23:38:54,953 INFO L78 Accepts]: Start accepts. Automaton has 2117 states and 3450 transitions. Word has length 180 [2021-11-12 23:38:54,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:54,956 INFO L470 AbstractCegarLoop]: Abstraction has 2117 states and 3450 transitions. [2021-11-12 23:38:54,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.25) internal successors, (173), 4 states have internal predecessors, (173), 4 states have call successors, (47), 3 states have call predecessors, (47), 3 states have return successors, (39), 4 states have call predecessors, (39), 4 states have call successors, (39) [2021-11-12 23:38:54,957 INFO L276 IsEmpty]: Start isEmpty. Operand 2117 states and 3450 transitions. [2021-11-12 23:38:54,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-11-12 23:38:54,971 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:54,972 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:54,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:55,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:38:55,192 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:55,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:55,192 INFO L85 PathProgramCache]: Analyzing trace with hash -2049043650, now seen corresponding path program 1 times [2021-11-12 23:38:55,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:55,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1957346459] [2021-11-12 23:38:55,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:55,194 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:55,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:55,195 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:55,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 23:38:55,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:55,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:38:55,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:56,030 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-12 23:38:56,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:56,403 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-12 23:38:56,404 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:56,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1957346459] [2021-11-12 23:38:56,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1957346459] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:38:56,404 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:38:56,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:38:56,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266042174] [2021-11-12 23:38:56,405 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:56,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:38:56,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:56,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:38:56,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:38:56,407 INFO L87 Difference]: Start difference. First operand 2117 states and 3450 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-12 23:38:56,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:56,610 INFO L93 Difference]: Finished difference Result 5459 states and 9031 transitions. [2021-11-12 23:38:56,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:38:56,611 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 181 [2021-11-12 23:38:56,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:56,638 INFO L225 Difference]: With dead ends: 5459 [2021-11-12 23:38:56,638 INFO L226 Difference]: Without dead ends: 3503 [2021-11-12 23:38:56,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:38:56,650 INFO L933 BasicCegarLoop]: 887 mSDtfsCounter, 164 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 1745 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.36ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.65ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:56,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 1745 Invalid, 4 Unknown, 0 Unchecked, 5.36ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 4.65ms Time] [2021-11-12 23:38:56,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3503 states. [2021-11-12 23:38:56,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3503 to 3495. [2021-11-12 23:38:56,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3495 states, 2954 states have (on average 1.6235612728503723) internal successors, (4796), 3038 states have internal predecessors, (4796), 492 states have call successors, (492), 44 states have call predecessors, (492), 48 states have return successors, (499), 492 states have call predecessors, (499), 491 states have call successors, (499) [2021-11-12 23:38:56,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3495 states to 3495 states and 5787 transitions. [2021-11-12 23:38:56,945 INFO L78 Accepts]: Start accepts. Automaton has 3495 states and 5787 transitions. Word has length 181 [2021-11-12 23:38:56,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:56,946 INFO L470 AbstractCegarLoop]: Abstraction has 3495 states and 5787 transitions. [2021-11-12 23:38:56,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-12 23:38:56,947 INFO L276 IsEmpty]: Start isEmpty. Operand 3495 states and 5787 transitions. [2021-11-12 23:38:56,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-12 23:38:56,967 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:56,968 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:56,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:57,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:38:57,182 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:57,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:57,182 INFO L85 PathProgramCache]: Analyzing trace with hash -878352478, now seen corresponding path program 1 times [2021-11-12 23:38:57,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:57,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1923683984] [2021-11-12 23:38:57,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:57,183 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:57,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:57,184 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:57,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 23:38:57,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:57,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 854 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:38:57,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:57,894 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-12 23:38:57,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:58,193 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-12 23:38:58,194 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:58,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1923683984] [2021-11-12 23:38:58,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1923683984] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:38:58,194 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:38:58,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:38:58,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385981235] [2021-11-12 23:38:58,194 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:58,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:38:58,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:58,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:38:58,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:38:58,196 INFO L87 Difference]: Start difference. First operand 3495 states and 5787 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-12 23:38:58,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:58,505 INFO L93 Difference]: Finished difference Result 9452 states and 15817 transitions. [2021-11-12 23:38:58,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:38:58,506 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 182 [2021-11-12 23:38:58,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:58,583 INFO L225 Difference]: With dead ends: 9452 [2021-11-12 23:38:58,584 INFO L226 Difference]: Without dead ends: 6129 [2021-11-12 23:38:58,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:38:58,598 INFO L933 BasicCegarLoop]: 900 mSDtfsCounter, 162 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 1758 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.77ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.06ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:58,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 1758 Invalid, 4 Unknown, 0 Unchecked, 4.77ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 16.06ms Time] [2021-11-12 23:38:58,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6129 states. [2021-11-12 23:38:59,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6129 to 6121. [2021-11-12 23:38:59,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6121 states, 5196 states have (on average 1.6314472671285605) internal successors, (8477), 5344 states have internal predecessors, (8477), 876 states have call successors, (876), 44 states have call predecessors, (876), 48 states have return successors, (883), 876 states have call predecessors, (883), 875 states have call successors, (883) [2021-11-12 23:38:59,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6121 states to 6121 states and 10236 transitions. [2021-11-12 23:38:59,069 INFO L78 Accepts]: Start accepts. Automaton has 6121 states and 10236 transitions. Word has length 182 [2021-11-12 23:38:59,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:59,070 INFO L470 AbstractCegarLoop]: Abstraction has 6121 states and 10236 transitions. [2021-11-12 23:38:59,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-12 23:38:59,070 INFO L276 IsEmpty]: Start isEmpty. Operand 6121 states and 10236 transitions. [2021-11-12 23:38:59,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-12 23:38:59,108 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:59,108 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:59,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:59,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:38:59,327 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:59,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:59,327 INFO L85 PathProgramCache]: Analyzing trace with hash 475611706, now seen corresponding path program 1 times [2021-11-12 23:38:59,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:59,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1569560053] [2021-11-12 23:38:59,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:59,329 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:59,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:59,330 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:59,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 23:38:59,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:59,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 856 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:38:59,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:00,079 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-12 23:39:00,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:00,467 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-12 23:39:00,467 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:39:00,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1569560053] [2021-11-12 23:39:00,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1569560053] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:39:00,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [421695826] [2021-11-12 23:39:00,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:39:00,468 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:39:00,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:39:00,469 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:39:00,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-12 23:39:00,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:00,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 856 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-12 23:39:00,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:01,899 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-12 23:39:01,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:03,247 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:39:03,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [421695826] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:39:03,248 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:39:03,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22, 20] imperfect sequences [5, 5] total 46 [2021-11-12 23:39:03,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757899611] [2021-11-12 23:39:03,249 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:39:03,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-12 23:39:03,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:39:03,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-12 23:39:03,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1946, Unknown=0, NotChecked=0, Total=2070 [2021-11-12 23:39:03,251 INFO L87 Difference]: Start difference. First operand 6121 states and 10236 transitions. Second operand has 40 states, 35 states have (on average 5.0285714285714285) internal successors, (176), 30 states have internal predecessors, (176), 18 states have call successors, (48), 13 states have call predecessors, (48), 8 states have return successors, (32), 12 states have call predecessors, (32), 12 states have call successors, (32) [2021-11-12 23:39:05,285 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:39:07,297 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:39:09,302 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:39:11,307 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:39:13,315 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:39:26,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:39:26,948 INFO L93 Difference]: Finished difference Result 7604 states and 12438 transitions. [2021-11-12 23:39:26,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-11-12 23:39:26,949 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 35 states have (on average 5.0285714285714285) internal successors, (176), 30 states have internal predecessors, (176), 18 states have call successors, (48), 13 states have call predecessors, (48), 8 states have return successors, (32), 12 states have call predecessors, (32), 12 states have call successors, (32) Word has length 182 [2021-11-12 23:39:26,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:39:27,019 INFO L225 Difference]: With dead ends: 7604 [2021-11-12 23:39:27,019 INFO L226 Difference]: Without dead ends: 7288 [2021-11-12 23:39:27,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 797 GetRequests, 683 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2680 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1050, Invalid=12290, Unknown=0, NotChecked=0, Total=13340 [2021-11-12 23:39:27,032 INFO L933 BasicCegarLoop]: 1059 mSDtfsCounter, 5959 mSDsluCounter, 23341 mSDsCounter, 0 mSdLazyCounter, 6501 mSolverCounterSat, 2890 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18476.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5970 SdHoareTripleChecker+Valid, 24400 SdHoareTripleChecker+Invalid, 9396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 107.23ms SdHoareTripleChecker+Time, 2890 IncrementalHoareTripleChecker+Valid, 6501 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19781.56ms IncrementalHoareTripleChecker+Time [2021-11-12 23:39:27,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5970 Valid, 24400 Invalid, 9396 Unknown, 0 Unchecked, 107.23ms Time], IncrementalHoareTripleChecker [2890 Valid, 6501 Invalid, 5 Unknown, 0 Unchecked, 19781.56ms Time] [2021-11-12 23:39:27,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7288 states. [2021-11-12 23:39:27,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7288 to 7114. [2021-11-12 23:39:27,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7114 states, 5888 states have (on average 1.6032608695652173) internal successors, (9440), 6081 states have internal predecessors, (9440), 1094 states have call successors, (1094), 113 states have call predecessors, (1094), 131 states have return successors, (1182), 1105 states have call predecessors, (1182), 1087 states have call successors, (1182) [2021-11-12 23:39:27,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7114 states to 7114 states and 11716 transitions. [2021-11-12 23:39:27,587 INFO L78 Accepts]: Start accepts. Automaton has 7114 states and 11716 transitions. Word has length 182 [2021-11-12 23:39:27,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:39:27,587 INFO L470 AbstractCegarLoop]: Abstraction has 7114 states and 11716 transitions. [2021-11-12 23:39:27,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 35 states have (on average 5.0285714285714285) internal successors, (176), 30 states have internal predecessors, (176), 18 states have call successors, (48), 13 states have call predecessors, (48), 8 states have return successors, (32), 12 states have call predecessors, (32), 12 states have call successors, (32) [2021-11-12 23:39:27,588 INFO L276 IsEmpty]: Start isEmpty. Operand 7114 states and 11716 transitions. [2021-11-12 23:39:27,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-12 23:39:27,650 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:39:27,651 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:39:27,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:39:27,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:39:28,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:39:28,071 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:39:28,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:39:28,071 INFO L85 PathProgramCache]: Analyzing trace with hash 289713937, now seen corresponding path program 1 times [2021-11-12 23:39:28,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:39:28,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1822821748] [2021-11-12 23:39:28,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:39:28,072 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:39:28,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:39:28,073 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:39:28,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 23:39:28,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:28,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 857 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:39:28,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:28,800 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-12 23:39:28,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:29,152 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-12 23:39:29,153 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:39:29,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1822821748] [2021-11-12 23:39:29,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1822821748] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:39:29,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [514809905] [2021-11-12 23:39:29,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:39:29,153 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:39:29,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:39:29,154 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:39:29,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-12 23:39:29,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:29,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 857 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:39:29,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:30,158 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:39:30,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:30,601 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:39:30,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [514809905] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:39:30,601 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:39:30,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [5, 5] total 11 [2021-11-12 23:39:30,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947175431] [2021-11-12 23:39:30,602 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:39:30,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:39:30,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:39:30,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:39:30,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:39:30,604 INFO L87 Difference]: Start difference. First operand 7114 states and 11716 transitions. Second operand has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 3 states have call successors, (50), 3 states have call predecessors, (50), 3 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) [2021-11-12 23:39:31,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:39:31,360 INFO L93 Difference]: Finished difference Result 15332 states and 25149 transitions. [2021-11-12 23:39:31,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:39:31,360 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 3 states have call successors, (50), 3 states have call predecessors, (50), 3 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) Word has length 183 [2021-11-12 23:39:31,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:39:31,423 INFO L225 Difference]: With dead ends: 15332 [2021-11-12 23:39:31,424 INFO L226 Difference]: Without dead ends: 14038 [2021-11-12 23:39:31,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 731 GetRequests, 719 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:39:31,437 INFO L933 BasicCegarLoop]: 970 mSDtfsCounter, 744 mSDsluCounter, 2705 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 748 SdHoareTripleChecker+Valid, 3675 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.57ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.66ms IncrementalHoareTripleChecker+Time [2021-11-12 23:39:31,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [748 Valid, 3675 Invalid, 19 Unknown, 0 Unchecked, 7.57ms Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 23.66ms Time] [2021-11-12 23:39:31,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14038 states. [2021-11-12 23:39:32,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14038 to 13994. [2021-11-12 23:39:32,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13994 states, 11597 states have (on average 1.6051565059929291) internal successors, (18615), 11978 states have internal predecessors, (18615), 2145 states have call successors, (2145), 218 states have call predecessors, (2145), 251 states have return successors, (2315), 2163 states have call predecessors, (2315), 2131 states have call successors, (2315) [2021-11-12 23:39:32,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13994 states to 13994 states and 23075 transitions. [2021-11-12 23:39:32,522 INFO L78 Accepts]: Start accepts. Automaton has 13994 states and 23075 transitions. Word has length 183 [2021-11-12 23:39:32,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:39:32,523 INFO L470 AbstractCegarLoop]: Abstraction has 13994 states and 23075 transitions. [2021-11-12 23:39:32,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 3 states have call successors, (50), 3 states have call predecessors, (50), 3 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) [2021-11-12 23:39:32,523 INFO L276 IsEmpty]: Start isEmpty. Operand 13994 states and 23075 transitions. [2021-11-12 23:39:32,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-12 23:39:32,623 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:39:32,623 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:39:32,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 23:39:32,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-12 23:39:33,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:39:33,038 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:39:33,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:39:33,039 INFO L85 PathProgramCache]: Analyzing trace with hash 244301683, now seen corresponding path program 1 times [2021-11-12 23:39:33,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:39:33,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [24959297] [2021-11-12 23:39:33,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:39:33,040 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:39:33,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:39:33,040 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:39:33,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 23:39:33,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:33,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 853 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:39:33,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:33,795 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-12 23:39:33,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:34,122 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-12 23:39:34,123 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:39:34,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [24959297] [2021-11-12 23:39:34,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [24959297] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:39:34,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1203127159] [2021-11-12 23:39:34,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:39:34,124 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:39:34,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:39:34,127 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:39:34,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-12 23:39:34,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:34,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 853 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 23:39:34,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:35,171 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:39:35,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:35,549 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:39:35,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1203127159] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:39:35,549 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:39:35,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16, 16] imperfect sequences [5, 5] total 23 [2021-11-12 23:39:35,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996866454] [2021-11-12 23:39:35,550 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:39:35,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-12 23:39:35,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:39:35,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-12 23:39:35,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-11-12 23:39:35,551 INFO L87 Difference]: Start difference. First operand 13994 states and 23075 transitions. Second operand has 17 states, 15 states have (on average 7.866666666666666) internal successors, (118), 13 states have internal predecessors, (118), 9 states have call successors, (32), 6 states have call predecessors, (32), 3 states have return successors, (24), 4 states have call predecessors, (24), 5 states have call successors, (24) [2021-11-12 23:39:36,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:39:36,868 INFO L93 Difference]: Finished difference Result 16959 states and 27532 transitions. [2021-11-12 23:39:36,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 23:39:36,869 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 7.866666666666666) internal successors, (118), 13 states have internal predecessors, (118), 9 states have call successors, (32), 6 states have call predecessors, (32), 3 states have return successors, (24), 4 states have call predecessors, (24), 5 states have call successors, (24) Word has length 183 [2021-11-12 23:39:36,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:39:36,974 INFO L225 Difference]: With dead ends: 16959 [2021-11-12 23:39:36,975 INFO L226 Difference]: Without dead ends: 14360 [2021-11-12 23:39:36,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 736 GetRequests, 707 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-11-12 23:39:36,993 INFO L933 BasicCegarLoop]: 887 mSDtfsCounter, 156 mSDsluCounter, 12316 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 483.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 13203 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.28ms SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 567.29ms IncrementalHoareTripleChecker+Time [2021-11-12 23:39:36,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 13203 Invalid, 531 Unknown, 0 Unchecked, 14.28ms Time], IncrementalHoareTripleChecker [69 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 567.29ms Time] [2021-11-12 23:39:37,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14360 states. [2021-11-12 23:39:37,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14360 to 14356. [2021-11-12 23:39:37,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14356 states, 11813 states have (on average 1.5998476254973335) internal successors, (18899), 12224 states have internal predecessors, (18899), 2269 states have call successors, (2269), 234 states have call predecessors, (2269), 273 states have return successors, (2503), 2291 states have call predecessors, (2503), 2247 states have call successors, (2503) [2021-11-12 23:39:37,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14356 states to 14356 states and 23671 transitions. [2021-11-12 23:39:37,958 INFO L78 Accepts]: Start accepts. Automaton has 14356 states and 23671 transitions. Word has length 183 [2021-11-12 23:39:37,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:39:37,960 INFO L470 AbstractCegarLoop]: Abstraction has 14356 states and 23671 transitions. [2021-11-12 23:39:37,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 7.866666666666666) internal successors, (118), 13 states have internal predecessors, (118), 9 states have call successors, (32), 6 states have call predecessors, (32), 3 states have return successors, (24), 4 states have call predecessors, (24), 5 states have call successors, (24) [2021-11-12 23:39:37,960 INFO L276 IsEmpty]: Start isEmpty. Operand 14356 states and 23671 transitions. [2021-11-12 23:39:38,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-12 23:39:38,021 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:39:38,021 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:39:38,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-12 23:39:38,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 23:39:38,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:39:38,425 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:39:38,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:39:38,426 INFO L85 PathProgramCache]: Analyzing trace with hash -934831442, now seen corresponding path program 1 times [2021-11-12 23:39:38,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:39:38,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1890726551] [2021-11-12 23:39:38,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:39:38,427 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:39:38,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:39:38,428 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:39:38,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 23:39:38,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:38,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:39:38,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:39,336 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-12 23:39:39,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:39,702 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-12 23:39:39,702 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:39:39,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1890726551] [2021-11-12 23:39:39,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1890726551] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:39:39,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [718526354] [2021-11-12 23:39:39,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:39:39,703 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:39:39,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:39:39,727 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:39:39,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-12 23:39:40,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:40,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:39:40,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:40,472 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-12 23:39:40,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:40,847 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:39:40,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [718526354] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:39:40,847 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:39:40,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 12 [2021-11-12 23:39:40,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081473259] [2021-11-12 23:39:40,848 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:39:40,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:39:40,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:39:40,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:39:40,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:39:40,849 INFO L87 Difference]: Start difference. First operand 14356 states and 23671 transitions. Second operand has 6 states, 5 states have (on average 25.2) internal successors, (126), 6 states have internal predecessors, (126), 3 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-12 23:39:41,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:39:41,477 INFO L93 Difference]: Finished difference Result 15110 states and 24702 transitions. [2021-11-12 23:39:41,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:39:41,478 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 25.2) internal successors, (126), 6 states have internal predecessors, (126), 3 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) Word has length 185 [2021-11-12 23:39:41,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:39:41,537 INFO L225 Difference]: With dead ends: 15110 [2021-11-12 23:39:41,537 INFO L226 Difference]: Without dead ends: 13374 [2021-11-12 23:39:41,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 737 GetRequests, 726 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:39:41,551 INFO L933 BasicCegarLoop]: 862 mSDtfsCounter, 9 mSDsluCounter, 3420 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 71.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 4282 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.58ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 82.21ms IncrementalHoareTripleChecker+Time [2021-11-12 23:39:41,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 4282 Invalid, 68 Unknown, 0 Unchecked, 4.58ms Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 82.21ms Time] [2021-11-12 23:39:41,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13374 states. [2021-11-12 23:39:42,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13374 to 13336. [2021-11-12 23:39:42,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13336 states, 11125 states have (on average 1.6130337078651686) internal successors, (17945), 11478 states have internal predecessors, (17945), 2015 states have call successors, (2015), 166 states have call predecessors, (2015), 195 states have return successors, (2139), 2039 states have call predecessors, (2139), 1999 states have call successors, (2139) [2021-11-12 23:39:42,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13336 states to 13336 states and 22099 transitions. [2021-11-12 23:39:42,509 INFO L78 Accepts]: Start accepts. Automaton has 13336 states and 22099 transitions. Word has length 185 [2021-11-12 23:39:42,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:39:42,510 INFO L470 AbstractCegarLoop]: Abstraction has 13336 states and 22099 transitions. [2021-11-12 23:39:42,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 25.2) internal successors, (126), 6 states have internal predecessors, (126), 3 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-12 23:39:42,510 INFO L276 IsEmpty]: Start isEmpty. Operand 13336 states and 22099 transitions. [2021-11-12 23:39:42,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-12 23:39:42,566 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:39:42,566 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:39:42,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-12 23:39:42,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 23:39:42,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:39:42,978 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:39:42,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:39:42,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1847348143, now seen corresponding path program 1 times [2021-11-12 23:39:42,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:39:42,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [697199483] [2021-11-12 23:39:42,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:39:42,980 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:39:42,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:39:42,981 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:39:43,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 23:39:43,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:43,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:39:43,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:43,908 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-12 23:39:43,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:44,307 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-12 23:39:44,308 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:39:44,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [697199483] [2021-11-12 23:39:44,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [697199483] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:39:44,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1433149655] [2021-11-12 23:39:44,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:39:44,309 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:39:44,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:39:44,311 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:39:44,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-12 23:39:44,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:44,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:39:44,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:45,101 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:39:45,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:45,510 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:39:45,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1433149655] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:39:45,511 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:39:45,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [5, 5] total 18 [2021-11-12 23:39:45,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197911913] [2021-11-12 23:39:45,511 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:39:45,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:39:45,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:39:45,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:39:45,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:39:45,513 INFO L87 Difference]: Start difference. First operand 13336 states and 22099 transitions. Second operand has 12 states, 12 states have (on average 9.583333333333334) internal successors, (115), 8 states have internal predecessors, (115), 1 states have call successors, (29), 1 states have call predecessors, (29), 5 states have return successors, (23), 5 states have call predecessors, (23), 1 states have call successors, (23) [2021-11-12 23:39:45,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:39:45,957 INFO L93 Difference]: Finished difference Result 13453 states and 22287 transitions. [2021-11-12 23:39:45,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:39:45,958 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 9.583333333333334) internal successors, (115), 8 states have internal predecessors, (115), 1 states have call successors, (29), 1 states have call predecessors, (29), 5 states have return successors, (23), 5 states have call predecessors, (23), 1 states have call successors, (23) Word has length 185 [2021-11-12 23:39:45,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:39:46,017 INFO L225 Difference]: With dead ends: 13453 [2021-11-12 23:39:46,017 INFO L226 Difference]: Without dead ends: 13451 [2021-11-12 23:39:46,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 736 GetRequests, 720 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:39:46,027 INFO L933 BasicCegarLoop]: 875 mSDtfsCounter, 11 mSDsluCounter, 5224 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 6099 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.42ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.27ms IncrementalHoareTripleChecker+Time [2021-11-12 23:39:46,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 6099 Invalid, 29 Unknown, 0 Unchecked, 5.42ms Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 37.27ms Time] [2021-11-12 23:39:46,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13451 states. [2021-11-12 23:39:46,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13451 to 13358. [2021-11-12 23:39:46,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13358 states, 11143 states have (on average 1.6120434353405726) internal successors, (17963), 11493 states have internal predecessors, (17963), 2015 states have call successors, (2015), 166 states have call predecessors, (2015), 199 states have return successors, (2158), 2046 states have call predecessors, (2158), 1999 states have call successors, (2158) [2021-11-12 23:39:46,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13358 states to 13358 states and 22136 transitions. [2021-11-12 23:39:46,991 INFO L78 Accepts]: Start accepts. Automaton has 13358 states and 22136 transitions. Word has length 185 [2021-11-12 23:39:46,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:39:46,991 INFO L470 AbstractCegarLoop]: Abstraction has 13358 states and 22136 transitions. [2021-11-12 23:39:46,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.583333333333334) internal successors, (115), 8 states have internal predecessors, (115), 1 states have call successors, (29), 1 states have call predecessors, (29), 5 states have return successors, (23), 5 states have call predecessors, (23), 1 states have call successors, (23) [2021-11-12 23:39:46,992 INFO L276 IsEmpty]: Start isEmpty. Operand 13358 states and 22136 transitions. [2021-11-12 23:39:47,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-12 23:39:47,043 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:39:47,044 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:39:47,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-12 23:39:47,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-12 23:39:47,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:39:47,461 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:39:47,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:39:47,462 INFO L85 PathProgramCache]: Analyzing trace with hash -155169327, now seen corresponding path program 1 times [2021-11-12 23:39:47,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:39:47,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1560169180] [2021-11-12 23:39:47,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:39:47,463 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:39:47,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:39:47,464 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:39:47,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-12 23:39:47,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:47,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 866 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:39:47,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:48,359 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-12 23:39:48,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:48,819 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-12 23:39:48,820 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:39:48,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1560169180] [2021-11-12 23:39:48,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1560169180] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:39:48,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [552555088] [2021-11-12 23:39:48,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:39:48,821 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:39:48,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:39:48,822 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:39:48,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-12 23:39:49,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:49,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 866 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:39:49,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:49,652 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-12 23:39:49,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:49,999 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:39:50,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [552555088] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:39:50,000 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:39:50,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [5, 5] total 10 [2021-11-12 23:39:50,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539319926] [2021-11-12 23:39:50,001 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:39:50,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:39:50,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:39:50,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:39:50,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:39:50,003 INFO L87 Difference]: Start difference. First operand 13358 states and 22136 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 4 states have call successors, (34), 3 states have call predecessors, (34), 4 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-12 23:39:52,039 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:39:53,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:39:53,964 INFO L93 Difference]: Finished difference Result 39777 states and 66338 transitions. [2021-11-12 23:39:53,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:39:53,965 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 4 states have call successors, (34), 3 states have call predecessors, (34), 4 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 188 [2021-11-12 23:39:53,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:39:54,025 INFO L225 Difference]: With dead ends: 39777 [2021-11-12 23:39:54,025 INFO L226 Difference]: Without dead ends: 13248 [2021-11-12 23:39:54,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 748 GetRequests, 740 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:39:54,104 INFO L933 BasicCegarLoop]: 1648 mSDtfsCounter, 1592 mSDsluCounter, 1284 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2627.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1592 SdHoareTripleChecker+Valid, 2932 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.34ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2749.12ms IncrementalHoareTripleChecker+Time [2021-11-12 23:39:54,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1592 Valid, 2932 Invalid, 412 Unknown, 0 Unchecked, 7.34ms Time], IncrementalHoareTripleChecker [11 Valid, 400 Invalid, 1 Unknown, 0 Unchecked, 2749.12ms Time] [2021-11-12 23:39:54,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13248 states. [2021-11-12 23:39:55,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13248 to 13248. [2021-11-12 23:39:55,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13248 states, 11075 states have (on average 1.6130925507900677) internal successors, (17865), 11414 states have internal predecessors, (17865), 1981 states have call successors, (1981), 164 states have call predecessors, (1981), 191 states have return successors, (2095), 1999 states have call predecessors, (2095), 1965 states have call successors, (2095) [2021-11-12 23:39:55,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13248 states to 13248 states and 21941 transitions. [2021-11-12 23:39:55,129 INFO L78 Accepts]: Start accepts. Automaton has 13248 states and 21941 transitions. Word has length 188 [2021-11-12 23:39:55,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:39:55,130 INFO L470 AbstractCegarLoop]: Abstraction has 13248 states and 21941 transitions. [2021-11-12 23:39:55,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 4 states have call successors, (34), 3 states have call predecessors, (34), 4 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-12 23:39:55,130 INFO L276 IsEmpty]: Start isEmpty. Operand 13248 states and 21941 transitions. [2021-11-12 23:39:55,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-12 23:39:55,184 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:39:55,185 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:39:55,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-12 23:39:55,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-12 23:39:55,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:39:55,590 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:39:55,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:39:55,590 INFO L85 PathProgramCache]: Analyzing trace with hash 54603369, now seen corresponding path program 1 times [2021-11-12 23:39:55,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:39:55,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [613803633] [2021-11-12 23:39:55,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:39:55,592 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:39:55,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:39:55,593 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:39:55,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-12 23:39:56,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:56,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 917 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:39:56,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:56,369 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-12 23:39:56,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:56,703 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-12 23:39:56,704 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:39:56,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [613803633] [2021-11-12 23:39:56,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [613803633] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:39:56,704 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:39:56,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:39:56,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849433030] [2021-11-12 23:39:56,704 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:39:56,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:39:56,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:39:56,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:39:56,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:39:56,706 INFO L87 Difference]: Start difference. First operand 13248 states and 21941 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 2 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) [2021-11-12 23:39:58,762 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:39:59,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:39:59,345 INFO L93 Difference]: Finished difference Result 26063 states and 43313 transitions. [2021-11-12 23:39:59,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:39:59,346 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 2 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) Word has length 210 [2021-11-12 23:39:59,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:39:59,391 INFO L225 Difference]: With dead ends: 26063 [2021-11-12 23:39:59,391 INFO L226 Difference]: Without dead ends: 12845 [2021-11-12 23:39:59,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 417 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:39:59,422 INFO L933 BasicCegarLoop]: 853 mSDtfsCounter, 823 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2058.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 823 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.89ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2070.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:39:59,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [823 Valid, 882 Invalid, 5 Unknown, 0 Unchecked, 1.89ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 1 Unknown, 0 Unchecked, 2070.00ms Time] [2021-11-12 23:39:59,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12845 states. [2021-11-12 23:40:00,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12845 to 12837. [2021-11-12 23:40:00,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12837 states, 10787 states have (on average 1.619912858069899) internal successors, (17474), 11102 states have internal predecessors, (17474), 1883 states have call successors, (1883), 152 states have call predecessors, (1883), 166 states have return successors, (1955), 1883 states have call predecessors, (1955), 1867 states have call successors, (1955) [2021-11-12 23:40:00,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12837 states to 12837 states and 21312 transitions. [2021-11-12 23:40:00,246 INFO L78 Accepts]: Start accepts. Automaton has 12837 states and 21312 transitions. Word has length 210 [2021-11-12 23:40:00,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:40:00,247 INFO L470 AbstractCegarLoop]: Abstraction has 12837 states and 21312 transitions. [2021-11-12 23:40:00,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 2 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) [2021-11-12 23:40:00,248 INFO L276 IsEmpty]: Start isEmpty. Operand 12837 states and 21312 transitions. [2021-11-12 23:40:00,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-11-12 23:40:00,298 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:00,298 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:40:00,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-12 23:40:00,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:40:00,514 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:00,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:00,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1284689971, now seen corresponding path program 1 times [2021-11-12 23:40:00,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:40:00,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [437999322] [2021-11-12 23:40:00,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:00,516 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:40:00,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:40:00,517 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:40:00,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-12 23:40:00,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:00,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 912 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:40:00,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:01,331 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-12 23:40:01,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:01,721 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-12 23:40:01,721 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:40:01,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [437999322] [2021-11-12 23:40:01,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [437999322] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:40:01,721 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:40:01,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:40:01,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703353465] [2021-11-12 23:40:01,722 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:40:01,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:40:01,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:40:01,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:40:01,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:40:01,723 INFO L87 Difference]: Start difference. First operand 12837 states and 21312 transitions. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 3 states have call successors, (48), 3 states have call predecessors, (48), 3 states have return successors, (40), 3 states have call predecessors, (40), 3 states have call successors, (40) [2021-11-12 23:40:03,745 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:40:04,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:40:04,342 INFO L93 Difference]: Finished difference Result 25619 states and 42552 transitions. [2021-11-12 23:40:04,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:40:04,344 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 3 states have call successors, (48), 3 states have call predecessors, (48), 3 states have return successors, (40), 3 states have call predecessors, (40), 3 states have call successors, (40) Word has length 209 [2021-11-12 23:40:04,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:40:04,383 INFO L225 Difference]: With dead ends: 25619 [2021-11-12 23:40:04,383 INFO L226 Difference]: Without dead ends: 12834 [2021-11-12 23:40:04,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 415 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:40:04,417 INFO L933 BasicCegarLoop]: 826 mSDtfsCounter, 787 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2037.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 859 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.65ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2051.95ms IncrementalHoareTripleChecker+Time [2021-11-12 23:40:04,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [787 Valid, 859 Invalid, 24 Unknown, 0 Unchecked, 1.65ms Time], IncrementalHoareTripleChecker [10 Valid, 13 Invalid, 1 Unknown, 0 Unchecked, 2051.95ms Time] [2021-11-12 23:40:04,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12834 states. [2021-11-12 23:40:05,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12834 to 12826. [2021-11-12 23:40:05,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12826 states, 10783 states have (on average 1.5478994713901513) internal successors, (16691), 10835 states have internal predecessors, (16691), 1880 states have call successors, (1880), 152 states have call predecessors, (1880), 162 states have return successors, (1946), 1878 states have call predecessors, (1946), 1864 states have call successors, (1946) [2021-11-12 23:40:05,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12826 states to 12826 states and 20517 transitions. [2021-11-12 23:40:05,591 INFO L78 Accepts]: Start accepts. Automaton has 12826 states and 20517 transitions. Word has length 209 [2021-11-12 23:40:05,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:40:05,592 INFO L470 AbstractCegarLoop]: Abstraction has 12826 states and 20517 transitions. [2021-11-12 23:40:05,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 3 states have call successors, (48), 3 states have call predecessors, (48), 3 states have return successors, (40), 3 states have call predecessors, (40), 3 states have call successors, (40) [2021-11-12 23:40:05,592 INFO L276 IsEmpty]: Start isEmpty. Operand 12826 states and 20517 transitions. [2021-11-12 23:40:05,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-11-12 23:40:05,622 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:05,622 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:40:05,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-12 23:40:05,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:40:05,823 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:05,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:05,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1163184999, now seen corresponding path program 1 times [2021-11-12 23:40:05,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:40:05,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1877260775] [2021-11-12 23:40:05,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:05,825 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:40:05,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:40:05,826 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:40:05,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-12 23:40:06,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:06,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 964 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:40:06,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:06,694 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-12 23:40:06,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:07,213 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-12 23:40:07,213 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:40:07,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1877260775] [2021-11-12 23:40:07,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1877260775] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:40:07,213 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:40:07,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 12 [2021-11-12 23:40:07,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586137823] [2021-11-12 23:40:07,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:40:07,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:40:07,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:40:07,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:40:07,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:40:07,216 INFO L87 Difference]: Start difference. First operand 12826 states and 20517 transitions. Second operand has 8 states, 6 states have (on average 23.333333333333332) internal successors, (140), 8 states have internal predecessors, (140), 4 states have call successors, (35), 2 states have call predecessors, (35), 4 states have return successors, (27), 3 states have call predecessors, (27), 4 states have call successors, (27) [2021-11-12 23:40:08,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:40:08,026 INFO L93 Difference]: Finished difference Result 25589 states and 40956 transitions. [2021-11-12 23:40:08,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:40:08,027 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 23.333333333333332) internal successors, (140), 8 states have internal predecessors, (140), 4 states have call successors, (35), 2 states have call predecessors, (35), 4 states have return successors, (27), 3 states have call predecessors, (27), 4 states have call successors, (27) Word has length 225 [2021-11-12 23:40:08,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:40:08,065 INFO L225 Difference]: With dead ends: 25589 [2021-11-12 23:40:08,065 INFO L226 Difference]: Without dead ends: 12830 [2021-11-12 23:40:08,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 438 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:40:08,095 INFO L933 BasicCegarLoop]: 827 mSDtfsCounter, 361 mSDsluCounter, 4555 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 97.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 5382 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.04ms SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 114.44ms IncrementalHoareTripleChecker+Time [2021-11-12 23:40:08,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 5382 Invalid, 119 Unknown, 0 Unchecked, 6.04ms Time], IncrementalHoareTripleChecker [44 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 114.44ms Time] [2021-11-12 23:40:08,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12830 states. [2021-11-12 23:40:08,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12830 to 12828. [2021-11-12 23:40:08,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12828 states, 10784 states have (on average 1.5478486646884273) internal successors, (16692), 10837 states have internal predecessors, (16692), 1880 states have call successors, (1880), 152 states have call predecessors, (1880), 163 states have return successors, (1947), 1878 states have call predecessors, (1947), 1864 states have call successors, (1947) [2021-11-12 23:40:08,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12828 states to 12828 states and 20519 transitions. [2021-11-12 23:40:08,876 INFO L78 Accepts]: Start accepts. Automaton has 12828 states and 20519 transitions. Word has length 225 [2021-11-12 23:40:08,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:40:08,876 INFO L470 AbstractCegarLoop]: Abstraction has 12828 states and 20519 transitions. [2021-11-12 23:40:08,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 23.333333333333332) internal successors, (140), 8 states have internal predecessors, (140), 4 states have call successors, (35), 2 states have call predecessors, (35), 4 states have return successors, (27), 3 states have call predecessors, (27), 4 states have call successors, (27) [2021-11-12 23:40:08,876 INFO L276 IsEmpty]: Start isEmpty. Operand 12828 states and 20519 transitions. [2021-11-12 23:40:08,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-11-12 23:40:08,894 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:08,894 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:40:08,919 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-11-12 23:40:09,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:40:09,119 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:09,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:09,119 INFO L85 PathProgramCache]: Analyzing trace with hash -2103220780, now seen corresponding path program 1 times [2021-11-12 23:40:09,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:40:09,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [149408432] [2021-11-12 23:40:09,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:09,120 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:40:09,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:40:09,121 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:40:09,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-12 23:40:09,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:09,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 982 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:40:09,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:09,923 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-12 23:40:09,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:10,337 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-12 23:40:10,338 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:40:10,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [149408432] [2021-11-12 23:40:10,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [149408432] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:40:10,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:40:10,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2021-11-12 23:40:10,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230907150] [2021-11-12 23:40:10,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:40:10,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:40:10,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:40:10,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:40:10,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:40:10,340 INFO L87 Difference]: Start difference. First operand 12828 states and 20519 transitions. Second operand has 6 states, 5 states have (on average 29.0) internal successors, (145), 6 states have internal predecessors, (145), 3 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-12 23:40:11,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:40:11,068 INFO L93 Difference]: Finished difference Result 25592 states and 41024 transitions. [2021-11-12 23:40:11,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:40:11,069 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 29.0) internal successors, (145), 6 states have internal predecessors, (145), 3 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 234 [2021-11-12 23:40:11,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:40:11,094 INFO L225 Difference]: With dead ends: 25592 [2021-11-12 23:40:11,095 INFO L226 Difference]: Without dead ends: 12834 [2021-11-12 23:40:11,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 459 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:40:11,109 INFO L933 BasicCegarLoop]: 826 mSDtfsCounter, 359 mSDsluCounter, 2902 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 83.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 3728 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.67ms SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 99.46ms IncrementalHoareTripleChecker+Time [2021-11-12 23:40:11,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 3728 Invalid, 103 Unknown, 0 Unchecked, 3.67ms Time], IncrementalHoareTripleChecker [47 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 99.46ms Time] [2021-11-12 23:40:11,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12834 states. [2021-11-12 23:40:11,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12834 to 12830. [2021-11-12 23:40:11,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12830 states, 10785 states have (on average 1.5477978674084376) internal successors, (16693), 10839 states have internal predecessors, (16693), 1880 states have call successors, (1880), 152 states have call predecessors, (1880), 164 states have return successors, (1982), 1878 states have call predecessors, (1982), 1864 states have call successors, (1982) [2021-11-12 23:40:11,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12830 states to 12830 states and 20555 transitions. [2021-11-12 23:40:11,786 INFO L78 Accepts]: Start accepts. Automaton has 12830 states and 20555 transitions. Word has length 234 [2021-11-12 23:40:11,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:40:11,786 INFO L470 AbstractCegarLoop]: Abstraction has 12830 states and 20555 transitions. [2021-11-12 23:40:11,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 29.0) internal successors, (145), 6 states have internal predecessors, (145), 3 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-12 23:40:11,786 INFO L276 IsEmpty]: Start isEmpty. Operand 12830 states and 20555 transitions. [2021-11-12 23:40:11,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-11-12 23:40:11,804 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:11,805 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:40:11,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-11-12 23:40:12,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:40:12,006 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:12,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:12,006 INFO L85 PathProgramCache]: Analyzing trace with hash 853941939, now seen corresponding path program 1 times [2021-11-12 23:40:12,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:40:12,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [807708754] [2021-11-12 23:40:12,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:12,007 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:40:12,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:40:12,008 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:40:12,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-12 23:40:12,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:12,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 966 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:40:12,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:12,899 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-12 23:40:12,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:13,389 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-12 23:40:13,390 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:40:13,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [807708754] [2021-11-12 23:40:13,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [807708754] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:40:13,390 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:40:13,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-12 23:40:13,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281891075] [2021-11-12 23:40:13,390 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:40:13,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:40:13,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:40:13,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:40:13,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:40:13,391 INFO L87 Difference]: Start difference. First operand 12830 states and 20555 transitions. Second operand has 12 states, 8 states have (on average 21.75) internal successors, (174), 12 states have internal predecessors, (174), 6 states have call successors, (48), 2 states have call predecessors, (48), 4 states have return successors, (40), 3 states have call predecessors, (40), 6 states have call successors, (40) [2021-11-12 23:40:14,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:40:14,265 INFO L93 Difference]: Finished difference Result 25578 states and 41008 transitions. [2021-11-12 23:40:14,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:40:14,266 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 8 states have (on average 21.75) internal successors, (174), 12 states have internal predecessors, (174), 6 states have call successors, (48), 2 states have call predecessors, (48), 4 states have return successors, (40), 3 states have call predecessors, (40), 6 states have call successors, (40) Word has length 227 [2021-11-12 23:40:14,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:40:14,295 INFO L225 Difference]: With dead ends: 25578 [2021-11-12 23:40:14,295 INFO L226 Difference]: Without dead ends: 12830 [2021-11-12 23:40:14,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 442 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:40:14,311 INFO L933 BasicCegarLoop]: 827 mSDtfsCounter, 357 mSDsluCounter, 5834 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 106.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 6661 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.98ms SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 123.57ms IncrementalHoareTripleChecker+Time [2021-11-12 23:40:14,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 6661 Invalid, 132 Unknown, 0 Unchecked, 5.98ms Time], IncrementalHoareTripleChecker [42 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 123.57ms Time] [2021-11-12 23:40:14,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12830 states. [2021-11-12 23:40:14,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12830 to 12828. [2021-11-12 23:40:14,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12828 states, 10784 states have (on average 1.547755934718101) internal successors, (16691), 10837 states have internal predecessors, (16691), 1880 states have call successors, (1880), 152 states have call predecessors, (1880), 163 states have return successors, (1981), 1878 states have call predecessors, (1981), 1864 states have call successors, (1981) [2021-11-12 23:40:14,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12828 states to 12828 states and 20552 transitions. [2021-11-12 23:40:14,983 INFO L78 Accepts]: Start accepts. Automaton has 12828 states and 20552 transitions. Word has length 227 [2021-11-12 23:40:14,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:40:14,984 INFO L470 AbstractCegarLoop]: Abstraction has 12828 states and 20552 transitions. [2021-11-12 23:40:14,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 8 states have (on average 21.75) internal successors, (174), 12 states have internal predecessors, (174), 6 states have call successors, (48), 2 states have call predecessors, (48), 4 states have return successors, (40), 3 states have call predecessors, (40), 6 states have call successors, (40) [2021-11-12 23:40:14,984 INFO L276 IsEmpty]: Start isEmpty. Operand 12828 states and 20552 transitions. [2021-11-12 23:40:15,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-11-12 23:40:15,003 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:15,004 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:40:15,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-12 23:40:15,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:40:15,204 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:15,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:15,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1386457937, now seen corresponding path program 1 times [2021-11-12 23:40:15,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:40:15,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1543471691] [2021-11-12 23:40:15,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:15,206 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:40:15,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:40:15,207 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:40:15,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-12 23:40:15,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:15,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 983 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:40:15,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:16,068 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-12 23:40:16,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:16,581 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-12 23:40:16,582 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:40:16,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1543471691] [2021-11-12 23:40:16,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1543471691] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:40:16,582 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:40:16,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-12 23:40:16,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664444607] [2021-11-12 23:40:16,583 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:40:16,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:40:16,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:40:16,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:40:16,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:40:16,584 INFO L87 Difference]: Start difference. First operand 12828 states and 20552 transitions. Second operand has 12 states, 8 states have (on average 23.0) internal successors, (184), 12 states have internal predecessors, (184), 6 states have call successors, (50), 2 states have call predecessors, (50), 4 states have return successors, (42), 3 states have call predecessors, (42), 6 states have call successors, (42) [2021-11-12 23:40:17,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:40:17,640 INFO L93 Difference]: Finished difference Result 25578 states and 41008 transitions. [2021-11-12 23:40:17,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:40:17,641 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 8 states have (on average 23.0) internal successors, (184), 12 states have internal predecessors, (184), 6 states have call successors, (50), 2 states have call predecessors, (50), 4 states have return successors, (42), 3 states have call predecessors, (42), 6 states have call successors, (42) Word has length 235 [2021-11-12 23:40:17,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:40:17,685 INFO L225 Difference]: With dead ends: 25578 [2021-11-12 23:40:17,685 INFO L226 Difference]: Without dead ends: 12832 [2021-11-12 23:40:17,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 458 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:40:17,709 INFO L933 BasicCegarLoop]: 828 mSDtfsCounter, 533 mSDsluCounter, 4380 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 141.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 5208 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.44ms SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 160.23ms IncrementalHoareTripleChecker+Time [2021-11-12 23:40:17,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [535 Valid, 5208 Invalid, 142 Unknown, 0 Unchecked, 5.44ms Time], IncrementalHoareTripleChecker [62 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 160.23ms Time] [2021-11-12 23:40:17,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12832 states. [2021-11-12 23:40:18,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12832 to 12830. [2021-11-12 23:40:18,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12830 states, 10785 states have (on average 1.5477051460361613) internal successors, (16692), 10839 states have internal predecessors, (16692), 1880 states have call successors, (1880), 152 states have call predecessors, (1880), 164 states have return successors, (1982), 1878 states have call predecessors, (1982), 1864 states have call successors, (1982) [2021-11-12 23:40:18,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12830 states to 12830 states and 20554 transitions. [2021-11-12 23:40:18,449 INFO L78 Accepts]: Start accepts. Automaton has 12830 states and 20554 transitions. Word has length 235 [2021-11-12 23:40:18,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:40:18,449 INFO L470 AbstractCegarLoop]: Abstraction has 12830 states and 20554 transitions. [2021-11-12 23:40:18,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 8 states have (on average 23.0) internal successors, (184), 12 states have internal predecessors, (184), 6 states have call successors, (50), 2 states have call predecessors, (50), 4 states have return successors, (42), 3 states have call predecessors, (42), 6 states have call successors, (42) [2021-11-12 23:40:18,450 INFO L276 IsEmpty]: Start isEmpty. Operand 12830 states and 20554 transitions. [2021-11-12 23:40:18,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-11-12 23:40:18,470 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:18,471 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:40:18,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-12 23:40:18,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:40:18,672 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:18,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:18,672 INFO L85 PathProgramCache]: Analyzing trace with hash 720062328, now seen corresponding path program 1 times [2021-11-12 23:40:18,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:40:18,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1875549864] [2021-11-12 23:40:18,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:18,674 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:40:18,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:40:18,675 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:40:18,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-12 23:40:19,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:19,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 968 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:40:19,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:19,446 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-12 23:40:19,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:19,849 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-12 23:40:19,849 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:40:19,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1875549864] [2021-11-12 23:40:19,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1875549864] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:40:19,850 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:40:19,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-11-12 23:40:19,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280674195] [2021-11-12 23:40:19,850 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:40:19,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 23:40:19,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:40:19,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 23:40:19,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:40:19,851 INFO L87 Difference]: Start difference. First operand 12830 states and 20554 transitions. Second operand has 9 states, 7 states have (on average 24.571428571428573) internal successors, (172), 9 states have internal predecessors, (172), 4 states have call successors, (47), 2 states have call predecessors, (47), 3 states have return successors, (39), 4 states have call predecessors, (39), 4 states have call successors, (39) [2021-11-12 23:40:20,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:40:20,620 INFO L93 Difference]: Finished difference Result 25577 states and 41036 transitions. [2021-11-12 23:40:20,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:40:20,621 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 24.571428571428573) internal successors, (172), 9 states have internal predecessors, (172), 4 states have call successors, (47), 2 states have call predecessors, (47), 3 states have return successors, (39), 4 states have call predecessors, (39), 4 states have call successors, (39) Word has length 229 [2021-11-12 23:40:20,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:40:20,649 INFO L225 Difference]: With dead ends: 25577 [2021-11-12 23:40:20,649 INFO L226 Difference]: Without dead ends: 12834 [2021-11-12 23:40:20,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 449 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:40:20,666 INFO L933 BasicCegarLoop]: 826 mSDtfsCounter, 698 mSDsluCounter, 3729 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 92.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 698 SdHoareTripleChecker+Valid, 4555 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.11ms SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 111.87ms IncrementalHoareTripleChecker+Time [2021-11-12 23:40:20,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [698 Valid, 4555 Invalid, 151 Unknown, 0 Unchecked, 4.11ms Time], IncrementalHoareTripleChecker [82 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 111.87ms Time] [2021-11-12 23:40:20,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12834 states. [2021-11-12 23:40:21,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12834 to 12830. [2021-11-12 23:40:21,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12830 states, 10785 states have (on average 1.5477051460361613) internal successors, (16692), 10839 states have internal predecessors, (16692), 1880 states have call successors, (1880), 152 states have call predecessors, (1880), 164 states have return successors, (1981), 1878 states have call predecessors, (1981), 1864 states have call successors, (1981) [2021-11-12 23:40:21,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12830 states to 12830 states and 20553 transitions. [2021-11-12 23:40:21,332 INFO L78 Accepts]: Start accepts. Automaton has 12830 states and 20553 transitions. Word has length 229 [2021-11-12 23:40:21,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:40:21,332 INFO L470 AbstractCegarLoop]: Abstraction has 12830 states and 20553 transitions. [2021-11-12 23:40:21,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 24.571428571428573) internal successors, (172), 9 states have internal predecessors, (172), 4 states have call successors, (47), 2 states have call predecessors, (47), 3 states have return successors, (39), 4 states have call predecessors, (39), 4 states have call successors, (39) [2021-11-12 23:40:21,333 INFO L276 IsEmpty]: Start isEmpty. Operand 12830 states and 20553 transitions. [2021-11-12 23:40:21,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2021-11-12 23:40:21,355 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:21,356 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:40:21,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-12 23:40:21,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:40:21,561 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:21,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:21,561 INFO L85 PathProgramCache]: Analyzing trace with hash -109749209, now seen corresponding path program 1 times [2021-11-12 23:40:21,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:40:21,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1340300634] [2021-11-12 23:40:21,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:21,562 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:40:21,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:40:21,563 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:40:21,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-12 23:40:22,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:22,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 1002 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:40:22,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:22,426 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-11-12 23:40:22,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:22,874 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-11-12 23:40:22,874 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:40:22,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1340300634] [2021-11-12 23:40:22,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1340300634] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:40:22,874 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:40:22,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-11-12 23:40:22,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625167249] [2021-11-12 23:40:22,874 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:40:22,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 23:40:22,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:40:22,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 23:40:22,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:40:22,876 INFO L87 Difference]: Start difference. First operand 12830 states and 20553 transitions. Second operand has 9 states, 7 states have (on average 26.428571428571427) internal successors, (185), 9 states have internal predecessors, (185), 4 states have call successors, (51), 2 states have call predecessors, (51), 3 states have return successors, (43), 4 states have call predecessors, (43), 4 states have call successors, (43) [2021-11-12 23:40:23,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:40:23,676 INFO L93 Difference]: Finished difference Result 25579 states and 41072 transitions. [2021-11-12 23:40:23,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:40:23,677 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 26.428571428571427) internal successors, (185), 9 states have internal predecessors, (185), 4 states have call successors, (51), 2 states have call predecessors, (51), 3 states have return successors, (43), 4 states have call predecessors, (43), 4 states have call successors, (43) Word has length 245 [2021-11-12 23:40:23,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:40:23,705 INFO L225 Difference]: With dead ends: 25579 [2021-11-12 23:40:23,705 INFO L226 Difference]: Without dead ends: 12836 [2021-11-12 23:40:23,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:40:23,722 INFO L933 BasicCegarLoop]: 827 mSDtfsCounter, 529 mSDsluCounter, 3548 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 108.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 4375 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.17ms SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 128.94ms IncrementalHoareTripleChecker+Time [2021-11-12 23:40:23,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [529 Valid, 4375 Invalid, 140 Unknown, 0 Unchecked, 4.17ms Time], IncrementalHoareTripleChecker [58 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 128.94ms Time] [2021-11-12 23:40:23,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12836 states. [2021-11-12 23:40:24,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12836 to 12832. [2021-11-12 23:40:24,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12832 states, 10786 states have (on average 1.547654366771741) internal successors, (16693), 10841 states have internal predecessors, (16693), 1880 states have call successors, (1880), 152 states have call predecessors, (1880), 165 states have return successors, (2016), 1878 states have call predecessors, (2016), 1864 states have call successors, (2016) [2021-11-12 23:40:24,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12832 states to 12832 states and 20589 transitions. [2021-11-12 23:40:24,364 INFO L78 Accepts]: Start accepts. Automaton has 12832 states and 20589 transitions. Word has length 245 [2021-11-12 23:40:24,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:40:24,365 INFO L470 AbstractCegarLoop]: Abstraction has 12832 states and 20589 transitions. [2021-11-12 23:40:24,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 26.428571428571427) internal successors, (185), 9 states have internal predecessors, (185), 4 states have call successors, (51), 2 states have call predecessors, (51), 3 states have return successors, (43), 4 states have call predecessors, (43), 4 states have call successors, (43) [2021-11-12 23:40:24,365 INFO L276 IsEmpty]: Start isEmpty. Operand 12832 states and 20589 transitions. [2021-11-12 23:40:24,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-11-12 23:40:24,385 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:24,386 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:40:24,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-12 23:40:24,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:40:24,586 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:24,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:24,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1376153069, now seen corresponding path program 1 times [2021-11-12 23:40:24,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:40:24,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1437075492] [2021-11-12 23:40:24,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:24,588 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:40:24,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:40:24,589 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:40:24,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-12 23:40:24,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:25,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 970 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:40:25,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:25,373 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-12 23:40:25,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:25,775 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-12 23:40:25,776 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:40:25,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1437075492] [2021-11-12 23:40:25,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1437075492] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:40:25,776 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:40:25,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:40:25,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697906002] [2021-11-12 23:40:25,776 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:40:25,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:40:25,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:40:25,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:40:25,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:40:25,778 INFO L87 Difference]: Start difference. First operand 12832 states and 20589 transitions. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 2 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2021-11-12 23:40:26,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:40:26,919 INFO L93 Difference]: Finished difference Result 35874 states and 58045 transitions. [2021-11-12 23:40:26,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:40:26,919 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 2 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) Word has length 231 [2021-11-12 23:40:26,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:40:26,981 INFO L225 Difference]: With dead ends: 35874 [2021-11-12 23:40:26,982 INFO L226 Difference]: Without dead ends: 23230 [2021-11-12 23:40:27,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 459 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:40:27,008 INFO L933 BasicCegarLoop]: 856 mSDtfsCounter, 152 mSDsluCounter, 829 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 1685 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.06ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.08ms IncrementalHoareTripleChecker+Time [2021-11-12 23:40:27,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 1685 Invalid, 4 Unknown, 0 Unchecked, 2.06ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 4.08ms Time] [2021-11-12 23:40:27,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23230 states. [2021-11-12 23:40:28,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23230 to 23202. [2021-11-12 23:40:28,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23202 states, 19748 states have (on average 1.5583350212679765) internal successors, (30774), 19803 states have internal predecessors, (30774), 3288 states have call successors, (3288), 152 states have call predecessors, (3288), 165 states have return successors, (3488), 3286 states have call predecessors, (3488), 3272 states have call successors, (3488) [2021-11-12 23:40:28,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23202 states to 23202 states and 37550 transitions. [2021-11-12 23:40:28,415 INFO L78 Accepts]: Start accepts. Automaton has 23202 states and 37550 transitions. Word has length 231 [2021-11-12 23:40:28,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:40:28,416 INFO L470 AbstractCegarLoop]: Abstraction has 23202 states and 37550 transitions. [2021-11-12 23:40:28,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 2 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2021-11-12 23:40:28,417 INFO L276 IsEmpty]: Start isEmpty. Operand 23202 states and 37550 transitions. [2021-11-12 23:40:28,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-11-12 23:40:28,450 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:28,450 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:40:28,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-12 23:40:28,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:40:28,651 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:28,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:28,652 INFO L85 PathProgramCache]: Analyzing trace with hash -284226869, now seen corresponding path program 1 times [2021-11-12 23:40:28,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:40:28,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [103921153] [2021-11-12 23:40:28,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:28,654 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:40:28,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:40:28,655 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:40:28,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-12 23:40:29,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:29,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 972 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:40:29,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:29,436 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-12 23:40:29,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:29,800 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-12 23:40:29,801 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:40:29,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [103921153] [2021-11-12 23:40:29,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [103921153] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:40:29,801 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:40:29,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:40:29,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454980979] [2021-11-12 23:40:29,801 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:40:29,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:40:29,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:40:29,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:40:29,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:40:29,802 INFO L87 Difference]: Start difference. First operand 23202 states and 37550 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2021-11-12 23:40:31,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:40:31,743 INFO L93 Difference]: Finished difference Result 62222 states and 100054 transitions. [2021-11-12 23:40:31,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:40:31,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) Word has length 232 [2021-11-12 23:40:31,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:40:31,856 INFO L225 Difference]: With dead ends: 62222 [2021-11-12 23:40:31,856 INFO L226 Difference]: Without dead ends: 39232 [2021-11-12 23:40:31,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:40:31,902 INFO L933 BasicCegarLoop]: 867 mSDtfsCounter, 150 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 1670 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.83ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.92ms IncrementalHoareTripleChecker+Time [2021-11-12 23:40:31,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 1670 Invalid, 4 Unknown, 0 Unchecked, 1.83ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 3.92ms Time] [2021-11-12 23:40:31,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39232 states. [2021-11-12 23:40:34,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39232 to 39204. [2021-11-12 23:40:34,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39204 states, 33574 states have (on average 1.5266277476618813) internal successors, (51255), 33629 states have internal predecessors, (51255), 5464 states have call successors, (5464), 152 states have call predecessors, (5464), 165 states have return successors, (5792), 5462 states have call predecessors, (5792), 5448 states have call successors, (5792) [2021-11-12 23:40:34,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39204 states to 39204 states and 62511 transitions. [2021-11-12 23:40:34,939 INFO L78 Accepts]: Start accepts. Automaton has 39204 states and 62511 transitions. Word has length 232 [2021-11-12 23:40:34,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:40:34,940 INFO L470 AbstractCegarLoop]: Abstraction has 39204 states and 62511 transitions. [2021-11-12 23:40:34,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2021-11-12 23:40:34,940 INFO L276 IsEmpty]: Start isEmpty. Operand 39204 states and 62511 transitions. [2021-11-12 23:40:34,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-11-12 23:40:34,988 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:34,989 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:40:35,006 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2021-11-12 23:40:35,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:40:35,189 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:35,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:35,190 INFO L85 PathProgramCache]: Analyzing trace with hash -941345254, now seen corresponding path program 1 times [2021-11-12 23:40:35,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:40:35,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [674368697] [2021-11-12 23:40:35,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:35,191 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:40:35,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:40:35,192 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:40:35,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-12 23:40:35,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:35,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 970 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:40:35,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:35,999 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-12 23:40:35,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:36,389 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-12 23:40:36,390 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:40:36,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [674368697] [2021-11-12 23:40:36,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [674368697] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:40:36,390 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:40:36,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:40:36,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897097209] [2021-11-12 23:40:36,390 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:40:36,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:40:36,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:40:36,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:40:36,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:40:36,392 INFO L87 Difference]: Start difference. First operand 39204 states and 62511 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 2 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2021-11-12 23:40:41,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:40:41,082 INFO L93 Difference]: Finished difference Result 113547 states and 181583 transitions. [2021-11-12 23:40:41,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:40:41,082 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 2 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) Word has length 233 [2021-11-12 23:40:41,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:40:41,302 INFO L225 Difference]: With dead ends: 113547 [2021-11-12 23:40:41,302 INFO L226 Difference]: Without dead ends: 74562 [2021-11-12 23:40:41,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:40:41,374 INFO L933 BasicCegarLoop]: 854 mSDtfsCounter, 148 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 1684 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.15ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.04ms IncrementalHoareTripleChecker+Time [2021-11-12 23:40:41,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 1684 Invalid, 4 Unknown, 0 Unchecked, 2.15ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 4.04ms Time] [2021-11-12 23:40:41,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74562 states. [2021-11-12 23:40:47,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74562 to 74534. [2021-11-12 23:40:47,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74534 states, 64296 states have (on average 1.5258180913276098) internal successors, (98104), 64351 states have internal predecessors, (98104), 10072 states have call successors, (10072), 152 states have call predecessors, (10072), 165 states have return successors, (10656), 10070 states have call predecessors, (10656), 10056 states have call successors, (10656) [2021-11-12 23:40:47,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74534 states to 74534 states and 118832 transitions. [2021-11-12 23:40:47,227 INFO L78 Accepts]: Start accepts. Automaton has 74534 states and 118832 transitions. Word has length 233 [2021-11-12 23:40:47,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:40:47,228 INFO L470 AbstractCegarLoop]: Abstraction has 74534 states and 118832 transitions. [2021-11-12 23:40:47,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 2 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2021-11-12 23:40:47,228 INFO L276 IsEmpty]: Start isEmpty. Operand 74534 states and 118832 transitions. [2021-11-12 23:40:47,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-11-12 23:40:47,328 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:47,328 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:40:47,347 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2021-11-12 23:40:47,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:40:47,542 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:47,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:47,543 INFO L85 PathProgramCache]: Analyzing trace with hash 950310247, now seen corresponding path program 1 times [2021-11-12 23:40:47,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:40:47,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [462940396] [2021-11-12 23:40:47,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:47,544 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:40:47,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:40:47,545 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:40:47,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41716eab-84a2-4527-9e2d-cd51bfad4937/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-12 23:40:48,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:48,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 972 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:40:48,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:48,621 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-12 23:40:48,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:49,010 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-12 23:40:49,010 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:40:49,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [462940396] [2021-11-12 23:40:49,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [462940396] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:40:49,010 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:40:49,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:40:49,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816209527] [2021-11-12 23:40:49,011 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:40:49,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:40:49,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:40:49,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:40:49,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:40:49,012 INFO L87 Difference]: Start difference. First operand 74534 states and 118832 transitions. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 2 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37)