./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-programs/partial_mod_count_limited_3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-programs/partial_mod_count_limited_3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e98c2efe8dc7dfa25efbae5d9b3e7693444730d8a672856a92fef54f1a5fbcae --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:18:58,977 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:18:58,981 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:18:59,057 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:18:59,058 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:18:59,065 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:18:59,068 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:18:59,074 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:18:59,078 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:18:59,087 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:18:59,089 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:18:59,092 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:18:59,093 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:18:59,096 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:18:59,099 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:18:59,106 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:18:59,108 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:18:59,110 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:18:59,113 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:18:59,123 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:18:59,127 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:18:59,129 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:18:59,133 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:18:59,135 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:18:59,142 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:18:59,143 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:18:59,143 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:18:59,145 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:18:59,146 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:18:59,148 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:18:59,149 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:18:59,150 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:18:59,153 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:18:59,154 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:18:59,156 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:18:59,156 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:18:59,158 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:18:59,158 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:18:59,158 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:18:59,160 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:18:59,160 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:18:59,162 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 22:18:59,217 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:18:59,217 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:18:59,218 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:18:59,226 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:18:59,228 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:18:59,229 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:18:59,229 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:18:59,230 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:18:59,230 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:18:59,230 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:18:59,232 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:18:59,232 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:18:59,233 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:18:59,233 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:18:59,233 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:18:59,234 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:18:59,234 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:18:59,234 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:18:59,235 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:18:59,235 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:18:59,235 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:18:59,236 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:18:59,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:18:59,236 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:18:59,237 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:18:59,237 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:18:59,237 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:18:59,238 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:18:59,238 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:18:59,238 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:18:59,239 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:18:59,239 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:18:59,239 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e98c2efe8dc7dfa25efbae5d9b3e7693444730d8a672856a92fef54f1a5fbcae [2021-11-02 22:18:59,603 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:18:59,648 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:18:59,651 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:18:59,653 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:18:59,654 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:18:59,655 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/array-programs/partial_mod_count_limited_3.c [2021-11-02 22:18:59,758 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/data/a44c584ff/fe51ace8a8234a3aa495eff4718402d6/FLAGb5f57d339 [2021-11-02 22:19:00,427 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:19:00,428 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/sv-benchmarks/c/array-programs/partial_mod_count_limited_3.c [2021-11-02 22:19:00,444 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/data/a44c584ff/fe51ace8a8234a3aa495eff4718402d6/FLAGb5f57d339 [2021-11-02 22:19:00,764 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/data/a44c584ff/fe51ace8a8234a3aa495eff4718402d6 [2021-11-02 22:19:00,767 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:19:00,769 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:19:00,771 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:19:00,772 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:19:00,776 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:19:00,777 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:19:00" (1/1) ... [2021-11-02 22:19:00,779 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56c43122 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:00, skipping insertion in model container [2021-11-02 22:19:00,779 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:19:00" (1/1) ... [2021-11-02 22:19:00,789 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:19:00,804 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:19:01,013 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_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/sv-benchmarks/c/array-programs/partial_mod_count_limited_3.c[331,344] [2021-11-02 22:19:01,055 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:19:01,070 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:19:01,087 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_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/sv-benchmarks/c/array-programs/partial_mod_count_limited_3.c[331,344] [2021-11-02 22:19:01,123 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:19:01,143 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:19:01,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:01 WrapperNode [2021-11-02 22:19:01,144 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:19:01,146 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:19:01,147 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:19:01,147 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:19:01,156 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:01" (1/1) ... [2021-11-02 22:19:01,166 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:01" (1/1) ... [2021-11-02 22:19:01,198 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:19:01,200 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:19:01,200 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:19:01,200 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:19:01,211 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:01" (1/1) ... [2021-11-02 22:19:01,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:01" (1/1) ... [2021-11-02 22:19:01,215 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:01" (1/1) ... [2021-11-02 22:19:01,215 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:01" (1/1) ... [2021-11-02 22:19:01,223 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:01" (1/1) ... [2021-11-02 22:19:01,229 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:01" (1/1) ... [2021-11-02 22:19:01,231 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:01" (1/1) ... [2021-11-02 22:19:01,234 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:19:01,235 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:19:01,235 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:19:01,236 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:19:01,237 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:01" (1/1) ... [2021-11-02 22:19:01,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:19:01,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:19:01,299 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:19:01,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:19:01,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:19:01,349 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:19:01,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 22:19:01,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:19:01,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:19:01,350 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 22:19:01,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 22:19:01,769 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:19:01,770 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-11-02 22:19:01,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:19:01 BoogieIcfgContainer [2021-11-02 22:19:01,785 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:19:01,787 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:19:01,787 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:19:01,792 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:19:01,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:19:00" (1/3) ... [2021-11-02 22:19:01,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54bfc3cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:19:01, skipping insertion in model container [2021-11-02 22:19:01,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:01" (2/3) ... [2021-11-02 22:19:01,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54bfc3cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:19:01, skipping insertion in model container [2021-11-02 22:19:01,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:19:01" (3/3) ... [2021-11-02 22:19:01,796 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_mod_count_limited_3.c [2021-11-02 22:19:01,803 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:19:01,817 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 22:19:01,923 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:19:01,938 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-02 22:19:01,939 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 22:19:01,963 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:01,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-02 22:19:01,970 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:01,971 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:01,972 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:01,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:01,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1939796378, now seen corresponding path program 1 times [2021-11-02 22:19:02,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:02,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535198114] [2021-11-02 22:19:02,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:02,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:02,163 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:19:02,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2027820975] [2021-11-02 22:19:02,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:02,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:02,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:19:02,170 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:19:02,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:19:02,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:19:02,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-02 22:19:02,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:19:02,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:19:02,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:02,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535198114] [2021-11-02 22:19:02,416 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:19:02,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027820975] [2021-11-02 22:19:02,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027820975] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:19:02,419 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:19:02,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:19:02,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548211780] [2021-11-02 22:19:02,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-02 22:19:02,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:02,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-02 22:19:02,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 22:19:02,456 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:02,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:19:02,480 INFO L93 Difference]: Finished difference Result 39 states and 54 transitions. [2021-11-02 22:19:02,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-02 22:19:02,482 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-02 22:19:02,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:19:02,489 INFO L225 Difference]: With dead ends: 39 [2021-11-02 22:19:02,490 INFO L226 Difference]: Without dead ends: 17 [2021-11-02 22:19:02,493 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 22:19:02,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-02 22:19:02,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-02 22:19:02,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:02,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-11-02 22:19:02,540 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2021-11-02 22:19:02,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:19:02,541 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-11-02 22:19:02,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:02,544 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-11-02 22:19:02,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-02 22:19:02,545 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:02,546 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:02,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:19:02,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-02 22:19:02,773 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:02,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:02,774 INFO L85 PathProgramCache]: Analyzing trace with hash -54935082, now seen corresponding path program 1 times [2021-11-02 22:19:02,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:02,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062386459] [2021-11-02 22:19:02,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:02,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:02,804 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:19:02,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2137612566] [2021-11-02 22:19:02,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:02,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:02,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:19:02,814 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:19:02,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 22:19:02,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:19:02,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:19:02,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:19:03,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:19:03,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:03,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062386459] [2021-11-02 22:19:03,043 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:19:03,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137612566] [2021-11-02 22:19:03,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137612566] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:19:03,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:19:03,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:19:03,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758922378] [2021-11-02 22:19:03,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:19:03,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:03,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:19:03,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:19:03,048 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:03,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:19:03,114 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2021-11-02 22:19:03,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:19:03,115 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-02 22:19:03,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:19:03,117 INFO L225 Difference]: With dead ends: 42 [2021-11-02 22:19:03,117 INFO L226 Difference]: Without dead ends: 29 [2021-11-02 22:19:03,118 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:19:03,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-02 22:19:03,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2021-11-02 22:19:03,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:03,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-11-02 22:19:03,124 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2021-11-02 22:19:03,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:19:03,125 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-11-02 22:19:03,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:03,125 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-11-02 22:19:03,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-02 22:19:03,126 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:03,126 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:03,165 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-02 22:19:03,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:03,353 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:03,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:03,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1485448361, now seen corresponding path program 1 times [2021-11-02 22:19:03,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:03,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986148272] [2021-11-02 22:19:03,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:03,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:03,370 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:19:03,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2043184250] [2021-11-02 22:19:03,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:03,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:03,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:19:03,372 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:19:03,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 22:19:03,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:19:03,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:19:03,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:19:03,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:19:03,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:03,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986148272] [2021-11-02 22:19:03,641 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:19:03,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043184250] [2021-11-02 22:19:03,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043184250] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:19:03,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:19:03,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-11-02 22:19:03,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678247695] [2021-11-02 22:19:03,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:19:03,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:03,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:19:03,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:19:03,645 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:03,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:19:03,722 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2021-11-02 22:19:03,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:19:03,724 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-02 22:19:03,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:19:03,725 INFO L225 Difference]: With dead ends: 54 [2021-11-02 22:19:03,725 INFO L226 Difference]: Without dead ends: 41 [2021-11-02 22:19:03,726 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:19:03,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-02 22:19:03,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 24. [2021-11-02 22:19:03,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:03,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-11-02 22:19:03,734 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 16 [2021-11-02 22:19:03,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:19:03,734 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-11-02 22:19:03,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:03,735 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-11-02 22:19:03,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-02 22:19:03,736 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:03,736 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:03,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 22:19:03,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:03,965 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:03,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:03,966 INFO L85 PathProgramCache]: Analyzing trace with hash -2118808138, now seen corresponding path program 2 times [2021-11-02 22:19:03,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:03,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466356686] [2021-11-02 22:19:03,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:03,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:03,987 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:19:03,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1080016871] [2021-11-02 22:19:03,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:19:03,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:03,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:19:03,991 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:19:04,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 22:19:04,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-02 22:19:04,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:19:04,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 22:19:04,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:19:04,572 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-02 22:19:04,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:04,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466356686] [2021-11-02 22:19:04,573 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:19:04,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080016871] [2021-11-02 22:19:04,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080016871] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:19:04,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:19:04,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:19:04,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388283554] [2021-11-02 22:19:04,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:19:04,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:04,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:19:04,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:19:04,576 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:04,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:19:04,721 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2021-11-02 22:19:04,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:19:04,723 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-02 22:19:04,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:19:04,725 INFO L225 Difference]: With dead ends: 35 [2021-11-02 22:19:04,725 INFO L226 Difference]: Without dead ends: 33 [2021-11-02 22:19:04,725 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:19:04,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-02 22:19:04,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2021-11-02 22:19:04,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:04,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-11-02 22:19:04,733 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 21 [2021-11-02 22:19:04,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:19:04,734 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-11-02 22:19:04,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:04,734 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-11-02 22:19:04,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-02 22:19:04,735 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:04,735 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:04,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 22:19:04,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:04,956 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:04,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:04,956 INFO L85 PathProgramCache]: Analyzing trace with hash -2118867720, now seen corresponding path program 1 times [2021-11-02 22:19:04,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:04,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139232563] [2021-11-02 22:19:04,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:04,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:04,972 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:19:04,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [318602245] [2021-11-02 22:19:04,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:04,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:04,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:19:04,974 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:19:04,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 22:19:05,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:19:05,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 22:19:05,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:19:05,370 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:19:05,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:05,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139232563] [2021-11-02 22:19:05,372 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:19:05,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318602245] [2021-11-02 22:19:05,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318602245] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:19:05,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:19:05,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-11-02 22:19:05,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952762575] [2021-11-02 22:19:05,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:19:05,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:05,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:19:05,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:19:05,377 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:05,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:19:05,502 INFO L93 Difference]: Finished difference Result 89 states and 109 transitions. [2021-11-02 22:19:05,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:19:05,503 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-02 22:19:05,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:19:05,508 INFO L225 Difference]: With dead ends: 89 [2021-11-02 22:19:05,509 INFO L226 Difference]: Without dead ends: 71 [2021-11-02 22:19:05,511 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:19:05,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-02 22:19:05,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 34. [2021-11-02 22:19:05,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:05,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-11-02 22:19:05,535 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 21 [2021-11-02 22:19:05,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:19:05,536 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-11-02 22:19:05,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:05,536 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-11-02 22:19:05,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-02 22:19:05,538 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:05,538 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:05,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-02 22:19:05,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:05,739 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:05,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:05,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1636705269, now seen corresponding path program 2 times [2021-11-02 22:19:05,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:05,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369056259] [2021-11-02 22:19:05,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:05,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:05,754 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:19:05,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1694753058] [2021-11-02 22:19:05,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:19:05,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:05,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:19:05,769 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:19:05,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 22:19:05,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-02 22:19:05,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:19:05,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 22:19:05,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:19:06,317 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-02 22:19:06,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:06,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369056259] [2021-11-02 22:19:06,318 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:19:06,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694753058] [2021-11-02 22:19:06,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694753058] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:19:06,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:19:06,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:19:06,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169924548] [2021-11-02 22:19:06,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:19:06,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:06,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:19:06,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:19:06,322 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:08,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:19:08,773 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2021-11-02 22:19:08,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:19:08,774 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-02 22:19:08,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:19:08,775 INFO L225 Difference]: With dead ends: 46 [2021-11-02 22:19:08,775 INFO L226 Difference]: Without dead ends: 44 [2021-11-02 22:19:08,776 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:19:08,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-02 22:19:08,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2021-11-02 22:19:08,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.236842105263158) internal successors, (47), 38 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:08,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2021-11-02 22:19:08,782 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 26 [2021-11-02 22:19:08,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:19:08,782 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2021-11-02 22:19:08,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:08,783 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2021-11-02 22:19:08,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-02 22:19:08,784 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:08,784 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:08,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-02 22:19:09,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:09,029 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:09,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:09,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1380764901, now seen corresponding path program 1 times [2021-11-02 22:19:09,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:09,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314997851] [2021-11-02 22:19:09,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:09,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:09,044 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:19:09,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [949205753] [2021-11-02 22:19:09,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:09,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:09,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:19:09,061 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:19:09,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 22:19:09,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:19:09,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 22:19:09,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:19:09,557 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:19:09,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:09,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314997851] [2021-11-02 22:19:09,557 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:19:09,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949205753] [2021-11-02 22:19:09,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949205753] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:19:09,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:19:09,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-02 22:19:09,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829183468] [2021-11-02 22:19:09,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:19:09,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:09,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:19:09,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:19:09,560 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:09,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:19:09,748 INFO L93 Difference]: Finished difference Result 127 states and 154 transitions. [2021-11-02 22:19:09,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:19:09,749 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-02 22:19:09,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:19:09,751 INFO L225 Difference]: With dead ends: 127 [2021-11-02 22:19:09,751 INFO L226 Difference]: Without dead ends: 104 [2021-11-02 22:19:09,751 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:19:09,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-02 22:19:09,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 44. [2021-11-02 22:19:09,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 43 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:09,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2021-11-02 22:19:09,772 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 31 [2021-11-02 22:19:09,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:19:09,773 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2021-11-02 22:19:09,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:09,773 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2021-11-02 22:19:09,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-02 22:19:09,776 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:09,776 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:09,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-02 22:19:09,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-02 22:19:09,992 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:09,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:09,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1775597512, now seen corresponding path program 2 times [2021-11-02 22:19:09,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:09,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7477566] [2021-11-02 22:19:09,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:09,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:10,015 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:19:10,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [265036400] [2021-11-02 22:19:10,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:19:10,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:10,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:19:10,023 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:19:10,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-02 22:19:10,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:19:10,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:19:10,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 22:19:10,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:19:10,682 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:19:10,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:10,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7477566] [2021-11-02 22:19:10,683 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:19:10,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265036400] [2021-11-02 22:19:10,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265036400] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:19:10,683 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:19:10,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-02 22:19:10,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327303725] [2021-11-02 22:19:10,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:19:10,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:10,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:19:10,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:19:10,686 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:10,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:19:10,883 INFO L93 Difference]: Finished difference Result 149 states and 180 transitions. [2021-11-02 22:19:10,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:19:10,885 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-02 22:19:10,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:19:10,887 INFO L225 Difference]: With dead ends: 149 [2021-11-02 22:19:10,887 INFO L226 Difference]: Without dead ends: 126 [2021-11-02 22:19:10,888 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:19:10,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-02 22:19:10,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 49. [2021-11-02 22:19:10,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 48 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:10,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2021-11-02 22:19:10,899 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 36 [2021-11-02 22:19:10,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:19:10,900 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2021-11-02 22:19:10,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:10,901 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2021-11-02 22:19:10,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-02 22:19:10,902 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:10,902 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:10,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-02 22:19:11,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-02 22:19:11,117 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:11,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:11,117 INFO L85 PathProgramCache]: Analyzing trace with hash -599004987, now seen corresponding path program 3 times [2021-11-02 22:19:11,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:11,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656597664] [2021-11-02 22:19:11,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:11,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:11,133 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:19:11,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [364209918] [2021-11-02 22:19:11,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:19:11,134 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:11,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:19:11,135 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:19:11,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-02 22:19:11,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-02 22:19:11,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:19:11,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-02 22:19:11,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:19:14,328 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-02 22:19:14,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:14,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656597664] [2021-11-02 22:19:14,328 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:19:14,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364209918] [2021-11-02 22:19:14,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364209918] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:19:14,329 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:19:14,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-02 22:19:14,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478444053] [2021-11-02 22:19:14,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:19:14,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:14,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:19:14,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:19:14,331 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:14,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:19:14,613 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2021-11-02 22:19:14,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:19:14,614 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-02 22:19:14,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:19:14,615 INFO L225 Difference]: With dead ends: 62 [2021-11-02 22:19:14,615 INFO L226 Difference]: Without dead ends: 60 [2021-11-02 22:19:14,615 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:19:14,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-02 22:19:14,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2021-11-02 22:19:14,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.2264150943396226) internal successors, (65), 53 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:14,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2021-11-02 22:19:14,638 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 41 [2021-11-02 22:19:14,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:19:14,638 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2021-11-02 22:19:14,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:14,639 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2021-11-02 22:19:14,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-02 22:19:14,643 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:14,643 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:14,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-02 22:19:14,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:14,861 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:14,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:14,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1681892459, now seen corresponding path program 4 times [2021-11-02 22:19:14,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:14,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441797229] [2021-11-02 22:19:14,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:14,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:14,877 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:19:14,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1338692627] [2021-11-02 22:19:14,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:19:14,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:14,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:19:14,880 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:19:14,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-02 22:19:15,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:19:15,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:19:15,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 22:19:15,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:19:15,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-02 22:19:15,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-02 22:19:15,364 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-02 22:19:15,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:15,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441797229] [2021-11-02 22:19:15,365 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:19:15,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338692627] [2021-11-02 22:19:15,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338692627] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:19:15,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:19:15,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-02 22:19:15,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937309679] [2021-11-02 22:19:15,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:19:15,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:15,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:19:15,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:19:15,367 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:15,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:19:15,488 INFO L93 Difference]: Finished difference Result 116 states and 139 transitions. [2021-11-02 22:19:15,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:19:15,490 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-02 22:19:15,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:19:15,491 INFO L225 Difference]: With dead ends: 116 [2021-11-02 22:19:15,491 INFO L226 Difference]: Without dead ends: 75 [2021-11-02 22:19:15,492 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:19:15,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-02 22:19:15,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2021-11-02 22:19:15,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 53 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:15,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2021-11-02 22:19:15,501 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 46 [2021-11-02 22:19:15,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:19:15,501 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2021-11-02 22:19:15,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:15,502 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2021-11-02 22:19:15,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-02 22:19:15,503 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:15,503 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:15,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-02 22:19:15,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-02 22:19:15,725 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:15,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:15,726 INFO L85 PathProgramCache]: Analyzing trace with hash -562090839, now seen corresponding path program 1 times [2021-11-02 22:19:15,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:15,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322942125] [2021-11-02 22:19:15,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:15,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:15,737 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:19:15,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [335033933] [2021-11-02 22:19:15,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:15,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:15,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:19:15,739 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:19:15,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-02 22:19:16,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:19:16,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-02 22:19:16,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:19:16,462 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-02 22:19:16,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:16,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322942125] [2021-11-02 22:19:16,463 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:19:16,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335033933] [2021-11-02 22:19:16,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335033933] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:19:16,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:19:16,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-02 22:19:16,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954765364] [2021-11-02 22:19:16,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:19:16,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:16,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:19:16,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:19:16,466 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:18,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:19:18,829 INFO L93 Difference]: Finished difference Result 197 states and 236 transitions. [2021-11-02 22:19:18,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:19:18,830 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-02 22:19:18,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:19:18,832 INFO L225 Difference]: With dead ends: 197 [2021-11-02 22:19:18,832 INFO L226 Difference]: Without dead ends: 169 [2021-11-02 22:19:18,833 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:19:18,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-11-02 22:19:18,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 59. [2021-11-02 22:19:18,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.206896551724138) internal successors, (70), 58 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:18,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2021-11-02 22:19:18,842 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 46 [2021-11-02 22:19:18,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:19:18,843 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2021-11-02 22:19:18,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:18,843 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2021-11-02 22:19:18,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-02 22:19:18,844 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:18,844 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:18,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-02 22:19:19,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:19,045 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:19,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:19,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1943967942, now seen corresponding path program 2 times [2021-11-02 22:19:19,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:19,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473468722] [2021-11-02 22:19:19,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:19,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:19,058 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:19:19,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1035544749] [2021-11-02 22:19:19,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:19:19,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:19,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:19:19,063 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:19:19,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-02 22:19:19,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:19:19,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:19:19,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 22:19:19,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:19:19,928 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-02 22:19:19,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:19,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473468722] [2021-11-02 22:19:19,929 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:19:19,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035544749] [2021-11-02 22:19:19,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035544749] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:19:19,929 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:19:19,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-02 22:19:19,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818102394] [2021-11-02 22:19:19,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:19:19,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:19,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:19:19,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:19:19,931 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:22,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:19:22,302 INFO L93 Difference]: Finished difference Result 224 states and 268 transitions. [2021-11-02 22:19:22,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:19:22,303 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-02 22:19:22,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:19:22,305 INFO L225 Difference]: With dead ends: 224 [2021-11-02 22:19:22,305 INFO L226 Difference]: Without dead ends: 196 [2021-11-02 22:19:22,306 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:19:22,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-02 22:19:22,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 64. [2021-11-02 22:19:22,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 63 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:22,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2021-11-02 22:19:22,315 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 51 [2021-11-02 22:19:22,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:19:22,315 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2021-11-02 22:19:22,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:22,315 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2021-11-02 22:19:22,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-02 22:19:22,317 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:22,317 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:22,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-02 22:19:22,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:22,525 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:22,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:22,526 INFO L85 PathProgramCache]: Analyzing trace with hash 71442249, now seen corresponding path program 3 times [2021-11-02 22:19:22,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:22,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90549054] [2021-11-02 22:19:22,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:22,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:22,538 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:19:22,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [758318416] [2021-11-02 22:19:22,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:19:22,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:22,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:19:22,545 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:19:22,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-02 22:19:22,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-02 22:19:22,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:19:22,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 22:19:22,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:19:23,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-02 22:19:23,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-11-02 22:19:23,242 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-02 22:19:23,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:23,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90549054] [2021-11-02 22:19:23,242 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:19:23,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758318416] [2021-11-02 22:19:23,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758318416] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:19:23,243 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:19:23,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 22:19:23,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84659372] [2021-11-02 22:19:23,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:19:23,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:23,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:19:23,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:19:23,245 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:25,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:19:25,627 INFO L93 Difference]: Finished difference Result 136 states and 163 transitions. [2021-11-02 22:19:25,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:19:25,628 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-02 22:19:25,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:19:25,629 INFO L225 Difference]: With dead ends: 136 [2021-11-02 22:19:25,629 INFO L226 Difference]: Without dead ends: 108 [2021-11-02 22:19:25,630 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:19:25,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-02 22:19:25,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 66. [2021-11-02 22:19:25,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 65 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:25,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2021-11-02 22:19:25,639 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 56 [2021-11-02 22:19:25,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:19:25,639 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2021-11-02 22:19:25,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:25,640 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2021-11-02 22:19:25,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-02 22:19:25,641 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:25,641 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:25,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-02 22:19:25,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-02 22:19:25,857 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:25,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:25,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1617501493, now seen corresponding path program 4 times [2021-11-02 22:19:25,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:25,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825070712] [2021-11-02 22:19:25,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:25,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:25,883 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:19:25,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [520028263] [2021-11-02 22:19:25,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:19:25,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:25,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:19:25,889 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:19:25,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-02 22:19:26,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:19:26,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:19:26,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 22:19:26,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:19:26,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-02 22:19:26,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-02 22:19:26,507 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-02 22:19:26,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:26,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825070712] [2021-11-02 22:19:26,508 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:19:26,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520028263] [2021-11-02 22:19:26,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520028263] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:19:26,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:19:26,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:19:26,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641262294] [2021-11-02 22:19:26,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:19:26,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:26,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:19:26,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:19:26,510 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:26,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:19:26,604 INFO L93 Difference]: Finished difference Result 132 states and 158 transitions. [2021-11-02 22:19:26,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:19:26,604 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-02 22:19:26,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:19:26,605 INFO L225 Difference]: With dead ends: 132 [2021-11-02 22:19:26,605 INFO L226 Difference]: Without dead ends: 74 [2021-11-02 22:19:26,606 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:19:26,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-02 22:19:26,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 66. [2021-11-02 22:19:26,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.2) internal successors, (78), 65 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:26,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2021-11-02 22:19:26,613 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 56 [2021-11-02 22:19:26,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:19:26,614 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2021-11-02 22:19:26,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:26,614 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2021-11-02 22:19:26,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-02 22:19:26,615 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:26,615 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:26,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-02 22:19:26,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-02 22:19:26,821 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:26,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:26,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1633020211, now seen corresponding path program 5 times [2021-11-02 22:19:26,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:26,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868926851] [2021-11-02 22:19:26,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:26,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:26,846 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:19:26,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1881850557] [2021-11-02 22:19:26,847 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:19:26,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:26,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:19:26,849 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:19:26,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-02 22:19:27,115 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-02 22:19:27,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:19:27,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 22:19:27,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:19:27,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-02 22:19:27,331 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-11-02 22:19:27,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 38 [2021-11-02 22:19:29,458 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-02 22:19:29,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 18 [2021-11-02 22:19:29,584 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 83 proven. 1 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-02 22:19:29,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:29,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868926851] [2021-11-02 22:19:29,584 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:19:29,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881850557] [2021-11-02 22:19:29,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881850557] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:19:29,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:19:29,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-02 22:19:29,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305719395] [2021-11-02 22:19:29,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:19:29,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:29,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:19:29,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=38, Unknown=1, NotChecked=0, Total=56 [2021-11-02 22:19:29,587 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:37,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:19:37,377 INFO L93 Difference]: Finished difference Result 140 states and 169 transitions. [2021-11-02 22:19:37,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:19:37,378 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-02 22:19:37,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:19:37,379 INFO L225 Difference]: With dead ends: 140 [2021-11-02 22:19:37,379 INFO L226 Difference]: Without dead ends: 97 [2021-11-02 22:19:37,380 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=32, Invalid=56, Unknown=2, NotChecked=0, Total=90 [2021-11-02 22:19:37,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-02 22:19:37,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 91. [2021-11-02 22:19:37,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:37,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2021-11-02 22:19:37,389 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 56 [2021-11-02 22:19:37,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:19:37,389 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2021-11-02 22:19:37,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:37,390 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2021-11-02 22:19:37,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-02 22:19:37,391 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:37,391 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:37,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-02 22:19:37,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-02 22:19:37,617 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:37,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:37,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1670153675, now seen corresponding path program 6 times [2021-11-02 22:19:37,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:37,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301268816] [2021-11-02 22:19:37,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:37,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:37,635 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:19:37,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1903711173] [2021-11-02 22:19:37,636 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:19:37,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:37,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:19:37,638 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:19:37,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-02 22:19:38,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-02 22:19:38,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:19:38,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 22:19:38,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:19:39,015 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-02 22:19:39,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:39,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301268816] [2021-11-02 22:19:39,015 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:19:39,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903711173] [2021-11-02 22:19:39,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903711173] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:19:39,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:19:39,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-02 22:19:39,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224669517] [2021-11-02 22:19:39,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:19:39,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:39,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:19:39,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:19:39,018 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:39,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:19:39,342 INFO L93 Difference]: Finished difference Result 104 states and 121 transitions. [2021-11-02 22:19:39,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 22:19:39,343 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-02 22:19:39,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:19:39,343 INFO L225 Difference]: With dead ends: 104 [2021-11-02 22:19:39,343 INFO L226 Difference]: Without dead ends: 102 [2021-11-02 22:19:39,344 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:19:39,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-02 22:19:39,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 96. [2021-11-02 22:19:39,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.1789473684210525) internal successors, (112), 95 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:39,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 112 transitions. [2021-11-02 22:19:39,353 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 112 transitions. Word has length 56 [2021-11-02 22:19:39,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:19:39,353 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 112 transitions. [2021-11-02 22:19:39,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:39,360 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 112 transitions. [2021-11-02 22:19:39,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-02 22:19:39,361 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:39,361 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:39,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-02 22:19:39,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-02 22:19:39,585 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:39,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:39,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1477851941, now seen corresponding path program 7 times [2021-11-02 22:19:39,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:39,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464550651] [2021-11-02 22:19:39,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:39,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:39,603 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:19:39,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [420704801] [2021-11-02 22:19:39,617 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:19:39,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:39,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:19:39,619 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:19:39,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-02 22:19:40,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:19:40,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-02 22:19:40,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:19:40,534 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-02 22:19:40,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:40,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464550651] [2021-11-02 22:19:40,534 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:19:40,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420704801] [2021-11-02 22:19:40,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420704801] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:19:40,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:19:40,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-02 22:19:40,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948649862] [2021-11-02 22:19:40,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 22:19:40,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:40,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 22:19:40,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:19:40,537 INFO L87 Difference]: Start difference. First operand 96 states and 112 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:45,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:19:45,153 INFO L93 Difference]: Finished difference Result 336 states and 400 transitions. [2021-11-02 22:19:45,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 22:19:45,155 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-02 22:19:45,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:19:45,157 INFO L225 Difference]: With dead ends: 336 [2021-11-02 22:19:45,157 INFO L226 Difference]: Without dead ends: 291 [2021-11-02 22:19:45,158 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:19:45,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-11-02 22:19:45,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 106. [2021-11-02 22:19:45,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.1714285714285715) internal successors, (123), 105 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:45,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 123 transitions. [2021-11-02 22:19:45,168 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 123 transitions. Word has length 61 [2021-11-02 22:19:45,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:19:45,168 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 123 transitions. [2021-11-02 22:19:45,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:45,169 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 123 transitions. [2021-11-02 22:19:45,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-02 22:19:45,169 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:45,170 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:45,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-02 22:19:45,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-02 22:19:45,385 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:45,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:45,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1255875722, now seen corresponding path program 8 times [2021-11-02 22:19:45,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:45,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331907995] [2021-11-02 22:19:45,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:45,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:45,409 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:19:45,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [34960826] [2021-11-02 22:19:45,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:19:45,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:45,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:19:45,417 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:19:45,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-02 22:19:45,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:19:45,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:19:45,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 22:19:45,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:19:46,595 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-02 22:19:46,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:46,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331907995] [2021-11-02 22:19:46,595 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:19:46,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34960826] [2021-11-02 22:19:46,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34960826] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:19:46,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:19:46,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-02 22:19:46,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257631612] [2021-11-02 22:19:46,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 22:19:46,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:46,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 22:19:46,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:19:46,597 INFO L87 Difference]: Start difference. First operand 106 states and 123 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:48,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:19:48,987 INFO L93 Difference]: Finished difference Result 373 states and 443 transitions. [2021-11-02 22:19:48,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 22:19:48,988 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-02 22:19:48,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:19:48,991 INFO L225 Difference]: With dead ends: 373 [2021-11-02 22:19:48,991 INFO L226 Difference]: Without dead ends: 328 [2021-11-02 22:19:48,992 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:19:48,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-11-02 22:19:49,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 116. [2021-11-02 22:19:49,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.1652173913043478) internal successors, (134), 115 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:49,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 134 transitions. [2021-11-02 22:19:49,008 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 134 transitions. Word has length 66 [2021-11-02 22:19:49,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:19:49,008 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 134 transitions. [2021-11-02 22:19:49,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:49,009 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 134 transitions. [2021-11-02 22:19:49,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-02 22:19:49,010 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:49,010 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:49,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-02 22:19:49,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-02 22:19:49,218 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:49,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:49,218 INFO L85 PathProgramCache]: Analyzing trace with hash -495794747, now seen corresponding path program 9 times [2021-11-02 22:19:49,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:49,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980223437] [2021-11-02 22:19:49,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:49,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:49,249 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:19:49,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [476828835] [2021-11-02 22:19:49,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:19:49,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:49,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:19:49,265 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:19:49,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-02 22:19:50,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-02 22:19:50,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:19:50,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-02 22:19:50,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:19:51,254 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2021-11-02 22:19:51,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:51,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980223437] [2021-11-02 22:19:51,255 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:19:51,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476828835] [2021-11-02 22:19:51,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476828835] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:19:51,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:19:51,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-02 22:19:51,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886142959] [2021-11-02 22:19:51,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:19:51,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:51,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:19:51,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:19:51,258 INFO L87 Difference]: Start difference. First operand 116 states and 134 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:53,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:19:53,792 INFO L93 Difference]: Finished difference Result 128 states and 148 transitions. [2021-11-02 22:19:53,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 22:19:53,793 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-02 22:19:53,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:19:53,794 INFO L225 Difference]: With dead ends: 128 [2021-11-02 22:19:53,794 INFO L226 Difference]: Without dead ends: 126 [2021-11-02 22:19:53,794 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:19:53,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-02 22:19:53,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 121. [2021-11-02 22:19:53,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.1666666666666667) internal successors, (140), 120 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:53,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 140 transitions. [2021-11-02 22:19:53,804 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 140 transitions. Word has length 71 [2021-11-02 22:19:53,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:19:53,804 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 140 transitions. [2021-11-02 22:19:53,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:53,805 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 140 transitions. [2021-11-02 22:19:53,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-02 22:19:53,806 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:53,806 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:53,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-02 22:19:54,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:54,013 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:54,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:54,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1692067691, now seen corresponding path program 10 times [2021-11-02 22:19:54,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:54,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739963009] [2021-11-02 22:19:54,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:54,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:54,030 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:19:54,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1269259241] [2021-11-02 22:19:54,030 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:19:54,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:54,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:19:54,032 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:19:54,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-02 22:19:54,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:19:54,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:19:54,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 22:19:54,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:19:54,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-02 22:19:54,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-11-02 22:19:54,884 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 100 proven. 2 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-11-02 22:19:54,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:54,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739963009] [2021-11-02 22:19:54,885 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:19:54,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269259241] [2021-11-02 22:19:54,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269259241] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:19:54,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:19:54,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-02 22:19:54,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967323754] [2021-11-02 22:19:54,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:19:54,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:54,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:19:54,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:19:54,888 INFO L87 Difference]: Start difference. First operand 121 states and 140 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:55,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:19:55,007 INFO L93 Difference]: Finished difference Result 176 states and 204 transitions. [2021-11-02 22:19:55,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:19:55,008 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-02 22:19:55,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:19:55,010 INFO L225 Difference]: With dead ends: 176 [2021-11-02 22:19:55,010 INFO L226 Difference]: Without dead ends: 108 [2021-11-02 22:19:55,010 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:19:55,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-02 22:19:55,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 86. [2021-11-02 22:19:55,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.1176470588235294) internal successors, (95), 85 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:55,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2021-11-02 22:19:55,018 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 76 [2021-11-02 22:19:55,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:19:55,018 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2021-11-02 22:19:55,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:55,019 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2021-11-02 22:19:55,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-02 22:19:55,020 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:55,020 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:55,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-11-02 22:19:55,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:55,241 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:55,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:55,241 INFO L85 PathProgramCache]: Analyzing trace with hash -2042199827, now seen corresponding path program 1 times [2021-11-02 22:19:55,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:55,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859890923] [2021-11-02 22:19:55,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:55,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:55,266 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:19:55,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1908750400] [2021-11-02 22:19:55,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:55,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:55,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:19:55,277 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:19:55,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-02 22:19:55,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:19:55,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-02 22:19:55,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:19:56,445 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-02 22:19:56,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:56,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859890923] [2021-11-02 22:19:56,446 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:19:56,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908750400] [2021-11-02 22:19:56,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908750400] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:19:56,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:19:56,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-02 22:19:56,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283997322] [2021-11-02 22:19:56,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 22:19:56,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:56,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 22:19:56,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:19:56,449 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:58,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:19:58,865 INFO L93 Difference]: Finished difference Result 386 states and 451 transitions. [2021-11-02 22:19:58,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 22:19:58,866 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-02 22:19:58,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:19:58,867 INFO L225 Difference]: With dead ends: 386 [2021-11-02 22:19:58,867 INFO L226 Difference]: Without dead ends: 346 [2021-11-02 22:19:58,868 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:19:58,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-11-02 22:19:58,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 91. [2021-11-02 22:19:58,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1111111111111112) internal successors, (100), 90 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:58,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2021-11-02 22:19:58,876 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 76 [2021-11-02 22:19:58,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:19:58,876 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2021-11-02 22:19:58,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:58,876 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2021-11-02 22:19:58,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-02 22:19:58,877 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:58,877 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:58,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-02 22:19:59,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:59,093 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:59,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:59,093 INFO L85 PathProgramCache]: Analyzing trace with hash 279020216, now seen corresponding path program 2 times [2021-11-02 22:19:59,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:59,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032599181] [2021-11-02 22:19:59,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:59,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:59,108 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:19:59,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [675961448] [2021-11-02 22:19:59,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:19:59,108 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:59,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:19:59,118 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:19:59,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-02 22:19:59,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:19:59,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:19:59,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-02 22:19:59,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:20:00,243 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-02 22:20:00,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:00,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032599181] [2021-11-02 22:20:00,244 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:20:00,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675961448] [2021-11-02 22:20:00,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675961448] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:20:00,244 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:20:00,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-02 22:20:00,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643887830] [2021-11-02 22:20:00,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 22:20:00,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:00,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 22:20:00,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:20:00,245 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:00,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:00,452 INFO L93 Difference]: Finished difference Result 423 states and 494 transitions. [2021-11-02 22:20:00,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 22:20:00,455 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-02 22:20:00,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:00,457 INFO L225 Difference]: With dead ends: 423 [2021-11-02 22:20:00,457 INFO L226 Difference]: Without dead ends: 383 [2021-11-02 22:20:00,458 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:20:00,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-11-02 22:20:00,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 96. [2021-11-02 22:20:00,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.105263157894737) internal successors, (105), 95 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:00,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2021-11-02 22:20:00,466 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 81 [2021-11-02 22:20:00,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:00,467 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2021-11-02 22:20:00,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:00,467 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2021-11-02 22:20:00,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-02 22:20:00,468 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:00,468 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:20:00,485 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-11-02 22:20:00,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-02 22:20:00,675 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:20:00,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:00,675 INFO L85 PathProgramCache]: Analyzing trace with hash -697899059, now seen corresponding path program 3 times [2021-11-02 22:20:00,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:00,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580667385] [2021-11-02 22:20:00,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:00,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:00,684 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:20:00,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1838290358] [2021-11-02 22:20:00,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:20:00,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:20:00,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:20:00,685 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:20:00,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-02 22:20:01,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-02 22:20:01,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:20:01,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-02 22:20:01,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:20:09,967 WARN L207 SmtUtils]: Spent 8.59 s on a formula simplification that was a NOOP. DAG size: 29 [2021-11-02 22:20:16,078 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2021-11-02 22:20:16,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:16,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580667385] [2021-11-02 22:20:16,079 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:20:16,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838290358] [2021-11-02 22:20:16,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838290358] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:20:16,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:20:16,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-02 22:20:16,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948404688] [2021-11-02 22:20:16,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:20:16,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:16,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:20:16,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:20:16,081 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:27,354 WARN L207 SmtUtils]: Spent 11.22 s on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-11-02 22:20:43,960 WARN L207 SmtUtils]: Spent 14.38 s on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-11-02 22:21:00,345 WARN L207 SmtUtils]: Spent 16.26 s on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-11-02 22:21:02,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:02,632 INFO L93 Difference]: Finished difference Result 197 states and 227 transitions. [2021-11-02 22:21:02,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:21:02,634 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-02 22:21:02,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:02,637 INFO L225 Difference]: With dead ends: 197 [2021-11-02 22:21:02,637 INFO L226 Difference]: Without dead ends: 164 [2021-11-02 22:21:02,637 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 57.0s TimeCoverageRelationStatistics Valid=37, Invalid=52, Unknown=1, NotChecked=0, Total=90 [2021-11-02 22:21:02,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-02 22:21:02,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 105. [2021-11-02 22:21:02,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.125) internal successors, (117), 104 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:21:02,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2021-11-02 22:21:02,653 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 86 [2021-11-02 22:21:02,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:02,653 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2021-11-02 22:21:02,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:21:02,654 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2021-11-02 22:21:02,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-02 22:21:02,655 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:02,655 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:21:02,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-02 22:21:02,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-02 22:21:02,868 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:21:02,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:02,868 INFO L85 PathProgramCache]: Analyzing trace with hash -459469228, now seen corresponding path program 1 times [2021-11-02 22:21:02,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:02,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27015765] [2021-11-02 22:21:02,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:02,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:02,888 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:21:02,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [478566926] [2021-11-02 22:21:02,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:02,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:21:02,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:21:02,890 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:21:02,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-02 22:21:03,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:03,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-02 22:21:03,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:21:04,531 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-02 22:21:04,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:04,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27015765] [2021-11-02 22:21:04,532 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:21:04,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478566926] [2021-11-02 22:21:04,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478566926] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:21:04,532 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:21:04,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-02 22:21:04,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244141151] [2021-11-02 22:21:04,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 22:21:04,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:04,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 22:21:04,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-02 22:21:04,534 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand has 16 states, 16 states have (on average 4.5625) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:21:04,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:04,915 INFO L93 Difference]: Finished difference Result 515 states and 604 transitions. [2021-11-02 22:21:04,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 22:21:04,916 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.5625) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-11-02 22:21:04,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:04,919 INFO L225 Difference]: With dead ends: 515 [2021-11-02 22:21:04,919 INFO L226 Difference]: Without dead ends: 466 [2021-11-02 22:21:04,920 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-02 22:21:04,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-11-02 22:21:04,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 115. [2021-11-02 22:21:04,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.1140350877192982) internal successors, (127), 114 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:21:04,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 127 transitions. [2021-11-02 22:21:04,935 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 127 transitions. Word has length 91 [2021-11-02 22:21:04,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:04,935 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 127 transitions. [2021-11-02 22:21:04,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.5625) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:21:04,936 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 127 transitions. [2021-11-02 22:21:04,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-02 22:21:04,937 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:04,937 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:21:04,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-02 22:21:05,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:21:05,161 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:21:05,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:05,161 INFO L85 PathProgramCache]: Analyzing trace with hash -830076044, now seen corresponding path program 2 times [2021-11-02 22:21:05,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:05,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049807640] [2021-11-02 22:21:05,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:05,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:05,177 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:21:05,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1712809223] [2021-11-02 22:21:05,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:21:05,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:21:05,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:21:05,178 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:21:05,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-02 22:21:05,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:21:05,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:21:05,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-02 22:21:05,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:21:07,025 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-02 22:21:07,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:07,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049807640] [2021-11-02 22:21:07,025 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:21:07,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712809223] [2021-11-02 22:21:07,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712809223] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:21:07,026 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:21:07,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-11-02 22:21:07,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515531950] [2021-11-02 22:21:07,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 22:21:07,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:07,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 22:21:07,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-02 22:21:07,028 INFO L87 Difference]: Start difference. First operand 115 states and 127 transitions. Second operand has 18 states, 18 states have (on average 4.611111111111111) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:21:07,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:07,459 INFO L93 Difference]: Finished difference Result 589 states and 690 transitions. [2021-11-02 22:21:07,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 22:21:07,460 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.611111111111111) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-11-02 22:21:07,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:07,464 INFO L225 Difference]: With dead ends: 589 [2021-11-02 22:21:07,464 INFO L226 Difference]: Without dead ends: 540 [2021-11-02 22:21:07,465 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-02 22:21:07,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-11-02 22:21:07,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 125. [2021-11-02 22:21:07,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.1048387096774193) internal successors, (137), 124 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:21:07,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 137 transitions. [2021-11-02 22:21:07,486 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 137 transitions. Word has length 101 [2021-11-02 22:21:07,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:07,486 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 137 transitions. [2021-11-02 22:21:07,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.611111111111111) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:21:07,487 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 137 transitions. [2021-11-02 22:21:07,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-02 22:21:07,488 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:07,488 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:21:07,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-02 22:21:07,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-02 22:21:07,702 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:21:07,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:07,703 INFO L85 PathProgramCache]: Analyzing trace with hash 397222036, now seen corresponding path program 3 times [2021-11-02 22:21:07,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:07,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834650299] [2021-11-02 22:21:07,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:07,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:07,721 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:21:07,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1127776120] [2021-11-02 22:21:07,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:21:07,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:21:07,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:21:07,723 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:21:07,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-02 22:21:08,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-02 22:21:08,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:21:08,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 22:21:08,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:21:09,464 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 129 proven. 4 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-11-02 22:21:09,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:09,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834650299] [2021-11-02 22:21:09,464 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:21:09,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127776120] [2021-11-02 22:21:09,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127776120] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:21:09,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:21:09,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-02 22:21:09,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117216827] [2021-11-02 22:21:09,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:21:09,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:09,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:21:09,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:21:09,467 INFO L87 Difference]: Start difference. First operand 125 states and 137 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:21:11,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:11,860 INFO L93 Difference]: Finished difference Result 206 states and 238 transitions. [2021-11-02 22:21:11,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:21:11,861 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-11-02 22:21:11,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:11,862 INFO L225 Difference]: With dead ends: 206 [2021-11-02 22:21:11,863 INFO L226 Difference]: Without dead ends: 173 [2021-11-02 22:21:11,863 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:21:11,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-02 22:21:11,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 137. [2021-11-02 22:21:11,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.1323529411764706) internal successors, (154), 136 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:21:11,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 154 transitions. [2021-11-02 22:21:11,881 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 154 transitions. Word has length 111 [2021-11-02 22:21:11,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:11,882 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 154 transitions. [2021-11-02 22:21:11,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:21:11,882 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 154 transitions. [2021-11-02 22:21:11,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-02 22:21:11,884 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:11,884 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 17, 15, 15, 5, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:21:11,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-02 22:21:12,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:21:12,105 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:21:12,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:12,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1645099501, now seen corresponding path program 4 times [2021-11-02 22:21:12,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:12,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014227781] [2021-11-02 22:21:12,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:12,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:12,122 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:21:12,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [946273875] [2021-11-02 22:21:12,123 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:21:12,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:21:12,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:21:12,124 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:21:12,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-02 22:21:13,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:21:13,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:21:13,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 22:21:13,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:21:14,284 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-02 22:21:14,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:14,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014227781] [2021-11-02 22:21:14,285 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:21:14,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946273875] [2021-11-02 22:21:14,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946273875] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:21:14,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:21:14,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-11-02 22:21:14,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56042403] [2021-11-02 22:21:14,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 22:21:14,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:14,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 22:21:14,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-11-02 22:21:14,287 INFO L87 Difference]: Start difference. First operand 137 states and 154 transitions. Second operand has 21 states, 21 states have (on average 4.666666666666667) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:21:14,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:14,820 INFO L93 Difference]: Finished difference Result 724 states and 854 transitions. [2021-11-02 22:21:14,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-02 22:21:14,821 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.666666666666667) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-11-02 22:21:14,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:14,825 INFO L225 Difference]: With dead ends: 724 [2021-11-02 22:21:14,825 INFO L226 Difference]: Without dead ends: 663 [2021-11-02 22:21:14,826 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-11-02 22:21:14,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-11-02 22:21:14,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 152. [2021-11-02 22:21:14,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.119205298013245) internal successors, (169), 151 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:21:14,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 169 transitions. [2021-11-02 22:21:14,842 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 169 transitions. Word has length 116 [2021-11-02 22:21:14,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:14,843 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 169 transitions. [2021-11-02 22:21:14,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.666666666666667) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:21:14,843 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 169 transitions. [2021-11-02 22:21:14,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-02 22:21:14,844 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:14,844 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 20, 18, 18, 5, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:21:14,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-02 22:21:15,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-02 22:21:15,058 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:21:15,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:15,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1484809768, now seen corresponding path program 5 times [2021-11-02 22:21:15,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:15,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030014733] [2021-11-02 22:21:15,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:15,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:15,080 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:21:15,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [843098747] [2021-11-02 22:21:15,081 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:21:15,081 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:21:15,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:21:15,082 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:21:15,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-02 22:21:20,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-11-02 22:21:20,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:21:20,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-02 22:21:20,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:21:21,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1016 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-02 22:21:21,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:21,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030014733] [2021-11-02 22:21:21,958 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:21:21,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843098747] [2021-11-02 22:21:21,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843098747] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:21:21,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:21:21,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-11-02 22:21:21,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240337979] [2021-11-02 22:21:21,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 22:21:21,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:21,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 22:21:21,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-02 22:21:21,962 INFO L87 Difference]: Start difference. First operand 152 states and 169 transitions. Second operand has 24 states, 24 states have (on average 4.708333333333333) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:21:22,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:22,600 INFO L93 Difference]: Finished difference Result 835 states and 983 transitions. [2021-11-02 22:21:22,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-02 22:21:22,601 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.708333333333333) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-11-02 22:21:22,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:22,607 INFO L225 Difference]: With dead ends: 835 [2021-11-02 22:21:22,607 INFO L226 Difference]: Without dead ends: 774 [2021-11-02 22:21:22,608 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-02 22:21:22,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2021-11-02 22:21:22,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 167. [2021-11-02 22:21:22,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.108433734939759) internal successors, (184), 166 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:21:22,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 184 transitions. [2021-11-02 22:21:22,633 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 184 transitions. Word has length 131 [2021-11-02 22:21:22,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:22,634 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 184 transitions. [2021-11-02 22:21:22,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.708333333333333) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:21:22,634 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 184 transitions. [2021-11-02 22:21:22,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-02 22:21:22,635 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:22,635 INFO L513 BasicCegarLoop]: trace histogram [23, 23, 23, 21, 21, 5, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:21:22,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-02 22:21:22,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-02 22:21:22,851 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:21:22,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:22,852 INFO L85 PathProgramCache]: Analyzing trace with hash -466942323, now seen corresponding path program 6 times [2021-11-02 22:21:22,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:22,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849625410] [2021-11-02 22:21:22,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:22,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:22,870 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:21:22,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2143022826] [2021-11-02 22:21:22,871 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:21:22,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:21:22,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:21:22,873 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:21:22,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-02 22:21:24,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-02 22:21:24,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:21:24,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-02 22:21:24,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:21:25,034 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-02 22:21:25,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-02 22:21:25,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-02 22:21:42,543 WARN L860 $PredicateComparison]: unable to prove that (and (= (mod (mod (mod (+ c_ULTIMATE.start_main_~i~0 4294967295) 4294967296) 3) 4294967296) 0) (= c_~N~0 1000)) is different from true [2021-11-02 22:21:46,993 WARN L860 $PredicateComparison]: unable to prove that (and (= (mod (mod (mod (+ c_ULTIMATE.start_main_~i~0 4294967295) 4294967296) 3) 4294967296) 0) (= c_~N~0 1000) (< c_ULTIMATE.start_main_~i~0 c_~N~0)) is different from true [2021-11-02 22:22:06,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1334 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 1138 trivial. 111 not checked. [2021-11-02 22:22:06,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:06,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849625410] [2021-11-02 22:22:06,944 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:22:06,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143022826] [2021-11-02 22:22:06,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143022826] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:22:06,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:22:06,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-02 22:22:06,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68015000] [2021-11-02 22:22:06,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:22:06,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:06,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:22:06,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=33, Unknown=9, NotChecked=26, Total=90 [2021-11-02 22:22:06,946 INFO L87 Difference]: Start difference. First operand 167 states and 184 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:24:37,097 WARN L207 SmtUtils]: Spent 13.17 s on a formula simplification that was a NOOP. DAG size: 29 [2021-11-02 22:24:41,808 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (mod (mod (mod c_ULTIMATE.start_main_~i~0 4294967296) 3) 4294967296))) (and (= (mod (mod (mod (+ c_ULTIMATE.start_main_~i~0 4294967295) 4294967296) 3) 4294967296) 0) (= c_~N~0 1000) (= |c_ULTIMATE.start_main_#t~mem9| .cse0) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0.base|) (+ |c_ULTIMATE.start_main_~#a~0.offset| (* c_ULTIMATE.start_main_~i~0 4))) .cse0) (= c_ULTIMATE.start_main_~R~0 3) (< c_ULTIMATE.start_main_~i~0 c_~N~0))) is different from false [2021-11-02 22:25:15,074 WARN L207 SmtUtils]: Spent 6.72 s on a formula simplification that was a NOOP. DAG size: 19 [2021-11-02 22:25:53,101 WARN L207 SmtUtils]: Spent 10.99 s on a formula simplification that was a NOOP. DAG size: 23 [2021-11-02 22:26:39,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:26:39,516 INFO L93 Difference]: Finished difference Result 269 states and 312 transitions. [2021-11-02 22:26:39,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 22:26:39,757 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2021-11-02 22:26:39,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:26:39,759 INFO L225 Difference]: With dead ends: 269 [2021-11-02 22:26:39,759 INFO L226 Difference]: Without dead ends: 236 [2021-11-02 22:26:39,760 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 195.6s TimeCoverageRelationStatistics Valid=74, Invalid=145, Unknown=65, NotChecked=96, Total=380 [2021-11-02 22:26:39,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-11-02 22:26:39,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 193. [2021-11-02 22:26:39,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.1510416666666667) internal successors, (221), 192 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:39,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 221 transitions. [2021-11-02 22:26:39,795 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 221 transitions. Word has length 146 [2021-11-02 22:26:39,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:26:39,796 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 221 transitions. [2021-11-02 22:26:39,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:39,796 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 221 transitions. [2021-11-02 22:26:39,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-02 22:26:39,798 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:26:39,798 INFO L513 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 21, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:26:39,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-02 22:26:39,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-02 22:26:39,999 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:26:39,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:26:39,999 INFO L85 PathProgramCache]: Analyzing trace with hash 919261071, now seen corresponding path program 7 times [2021-11-02 22:26:39,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:26:39,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809755206] [2021-11-02 22:26:39,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:26:40,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:26:40,024 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:26:40,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [511992091] [2021-11-02 22:26:40,024 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:26:40,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:26:40,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:26:40,026 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:26:40,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-02 22:26:41,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:26:41,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-02 22:26:41,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:26:43,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1334 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-02 22:26:43,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:26:43,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809755206] [2021-11-02 22:26:43,201 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:26:43,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511992091] [2021-11-02 22:26:43,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511992091] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:26:43,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:26:43,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-11-02 22:26:43,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211123546] [2021-11-02 22:26:43,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-02 22:26:43,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:26:43,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-02 22:26:43,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-11-02 22:26:43,204 INFO L87 Difference]: Start difference. First operand 193 states and 221 transitions. Second operand has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:43,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:26:43,990 INFO L93 Difference]: Finished difference Result 998 states and 1186 transitions. [2021-11-02 22:26:43,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-02 22:26:43,991 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2021-11-02 22:26:43,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:26:43,997 INFO L225 Difference]: With dead ends: 998 [2021-11-02 22:26:43,998 INFO L226 Difference]: Without dead ends: 911 [2021-11-02 22:26:43,999 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-11-02 22:26:44,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2021-11-02 22:26:44,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 208. [2021-11-02 22:26:44,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 1.1400966183574879) internal successors, (236), 207 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:44,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 236 transitions. [2021-11-02 22:26:44,031 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 236 transitions. Word has length 146 [2021-11-02 22:26:44,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:26:44,032 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 236 transitions. [2021-11-02 22:26:44,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:44,032 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 236 transitions. [2021-11-02 22:26:44,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-02 22:26:44,034 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:26:44,034 INFO L513 BasicCegarLoop]: trace histogram [26, 26, 26, 25, 24, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:26:44,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-02 22:26:44,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:26:44,253 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:26:44,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:26:44,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1266957766, now seen corresponding path program 8 times [2021-11-02 22:26:44,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:26:44,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556578217] [2021-11-02 22:26:44,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:26:44,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:26:44,292 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:26:44,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [663711719] [2021-11-02 22:26:44,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:26:44,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:26:44,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:26:44,295 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:26:44,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-02 22:26:45,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:26:45,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:26:45,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-02 22:26:45,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:26:47,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1697 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-02 22:26:47,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:26:47,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556578217] [2021-11-02 22:26:47,904 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:26:47,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663711719] [2021-11-02 22:26:47,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663711719] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:26:47,904 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:26:47,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2021-11-02 22:26:47,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860431404] [2021-11-02 22:26:47,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-02 22:26:47,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:26:47,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-02 22:26:47,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-11-02 22:26:47,906 INFO L87 Difference]: Start difference. First operand 208 states and 236 transitions. Second operand has 30 states, 30 states have (on average 4.766666666666667) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:48,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:26:48,813 INFO L93 Difference]: Finished difference Result 1109 states and 1315 transitions. [2021-11-02 22:26:48,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-02 22:26:48,815 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.766666666666667) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 161 [2021-11-02 22:26:48,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:26:48,822 INFO L225 Difference]: With dead ends: 1109 [2021-11-02 22:26:48,822 INFO L226 Difference]: Without dead ends: 1022 [2021-11-02 22:26:48,823 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-11-02 22:26:48,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2021-11-02 22:26:48,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 223. [2021-11-02 22:26:48,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.1306306306306306) internal successors, (251), 222 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:48,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 251 transitions. [2021-11-02 22:26:48,853 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 251 transitions. Word has length 161 [2021-11-02 22:26:48,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:26:48,853 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 251 transitions. [2021-11-02 22:26:48,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.766666666666667) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:48,854 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 251 transitions. [2021-11-02 22:26:48,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-02 22:26:48,855 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:26:48,856 INFO L513 BasicCegarLoop]: trace histogram [29, 29, 29, 28, 27, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:26:48,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-02 22:26:49,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:26:49,069 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:26:49,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:26:49,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1325939665, now seen corresponding path program 9 times [2021-11-02 22:26:49,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:26:49,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367018107] [2021-11-02 22:26:49,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:26:49,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:26:49,097 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:26:49,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [331652678] [2021-11-02 22:26:49,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:26:49,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:26:49,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:26:49,101 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:26:49,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-02 22:26:50,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-02 22:26:50,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:26:50,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 22:26:50,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:26:52,127 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-02 22:26:52,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-02 22:26:54,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-02 22:27:07,604 WARN L838 $PredicateComparison]: unable to prove that (and (= c_~N~0 1000) (not (= (mod (mod (mod c_ULTIMATE.start_main_~i~0 4294967296) 3) 4294967296) 0)) (< c_ULTIMATE.start_main_~i~0 c_~N~0)) is different from false [2021-11-02 22:27:10,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2105 backedges. 28 proven. 85 refuted. 0 times theorem prover too weak. 1964 trivial. 28 not checked. [2021-11-02 22:27:10,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:10,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367018107] [2021-11-02 22:27:10,980 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:27:10,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331652678] [2021-11-02 22:27:10,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331652678] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:27:10,981 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:27:10,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-02 22:27:10,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40251801] [2021-11-02 22:27:10,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:27:10,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:10,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:27:10,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=35, Unknown=2, NotChecked=12, Total=72 [2021-11-02 22:27:10,984 INFO L87 Difference]: Start difference. First operand 223 states and 251 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:28,104 WARN L838 $PredicateComparison]: unable to prove that (and (= c_~N~0 1000) (= c_ULTIMATE.start_main_~R~0 3) (not (= (mod (mod (mod c_ULTIMATE.start_main_~i~0 4294967296) 3) 4294967296) 0)) (< c_ULTIMATE.start_main_~i~0 c_~N~0)) is different from false [2021-11-02 22:27:37,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:27:37,230 INFO L93 Difference]: Finished difference Result 261 states and 296 transitions. [2021-11-02 22:27:37,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:27:37,231 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 176 [2021-11-02 22:27:37,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:27:37,233 INFO L225 Difference]: With dead ends: 261 [2021-11-02 22:27:37,234 INFO L226 Difference]: Without dead ends: 228 [2021-11-02 22:27:37,234 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=41, Invalid=54, Unknown=3, NotChecked=34, Total=132 [2021-11-02 22:27:37,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-11-02 22:27:37,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 216. [2021-11-02 22:27:37,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.1162790697674418) internal successors, (240), 215 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:37,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 240 transitions. [2021-11-02 22:27:37,268 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 240 transitions. Word has length 176 [2021-11-02 22:27:37,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:27:37,269 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 240 transitions. [2021-11-02 22:27:37,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:37,269 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 240 transitions. [2021-11-02 22:27:37,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-02 22:27:37,271 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:37,271 INFO L513 BasicCegarLoop]: trace histogram [29, 29, 29, 28, 28, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:27:37,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-02 22:27:37,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-02 22:27:37,482 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:27:37,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:37,483 INFO L85 PathProgramCache]: Analyzing trace with hash -624339791, now seen corresponding path program 10 times [2021-11-02 22:27:37,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:37,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415050877] [2021-11-02 22:27:37,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:37,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:37,510 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:27:37,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [960057044] [2021-11-02 22:27:37,510 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:27:37,510 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:27:37,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:27:37,511 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:27:37,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-02 22:27:39,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:27:39,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:27:39,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-02 22:27:39,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:27:41,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2105 backedges. 0 proven. 2059 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-02 22:27:41,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:41,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415050877] [2021-11-02 22:27:41,894 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:27:41,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960057044] [2021-11-02 22:27:41,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960057044] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:27:41,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:27:41,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2021-11-02 22:27:41,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572751980] [2021-11-02 22:27:41,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-02 22:27:41,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:41,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-02 22:27:41,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-11-02 22:27:41,896 INFO L87 Difference]: Start difference. First operand 216 states and 240 transitions. Second operand has 33 states, 33 states have (on average 4.787878787878788) internal successors, (158), 32 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:42,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:27:42,745 INFO L93 Difference]: Finished difference Result 1206 states and 1422 transitions. [2021-11-02 22:27:42,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-02 22:27:42,746 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 4.787878787878788) internal successors, (158), 32 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 176 [2021-11-02 22:27:42,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:27:42,753 INFO L225 Difference]: With dead ends: 1206 [2021-11-02 22:27:42,753 INFO L226 Difference]: Without dead ends: 1126 [2021-11-02 22:27:42,755 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-11-02 22:27:42,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1126 states. [2021-11-02 22:27:42,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1126 to 231. [2021-11-02 22:27:42,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.108695652173913) internal successors, (255), 230 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:42,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 255 transitions. [2021-11-02 22:27:42,783 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 255 transitions. Word has length 176 [2021-11-02 22:27:42,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:27:42,784 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 255 transitions. [2021-11-02 22:27:42,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.787878787878788) internal successors, (158), 32 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:42,784 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 255 transitions. [2021-11-02 22:27:42,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-02 22:27:42,785 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:42,786 INFO L513 BasicCegarLoop]: trace histogram [32, 32, 32, 31, 31, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:27:42,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-02 22:27:43,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:27:43,005 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:27:43,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:43,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1229228572, now seen corresponding path program 11 times [2021-11-02 22:27:43,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:43,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984650135] [2021-11-02 22:27:43,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:43,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:43,024 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:27:43,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2073788006] [2021-11-02 22:27:43,025 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:27:43,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:27:43,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:27:43,026 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:27:43,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-02 22:27:49,558 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2021-11-02 22:27:49,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:27:49,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-02 22:27:49,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:27:52,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2558 backedges. 0 proven. 2512 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-02 22:27:52,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:52,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984650135] [2021-11-02 22:27:52,336 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:27:52,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073788006] [2021-11-02 22:27:52,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073788006] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:27:52,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:27:52,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2021-11-02 22:27:52,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981008507] [2021-11-02 22:27:52,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-02 22:27:52,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:52,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-02 22:27:52,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-11-02 22:27:52,339 INFO L87 Difference]: Start difference. First operand 231 states and 255 transitions. Second operand has 36 states, 36 states have (on average 4.805555555555555) internal successors, (173), 35 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:53,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:27:53,578 INFO L93 Difference]: Finished difference Result 1317 states and 1551 transitions. [2021-11-02 22:27:53,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-02 22:27:53,580 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.805555555555555) internal successors, (173), 35 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 191 [2021-11-02 22:27:53,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:27:53,587 INFO L225 Difference]: With dead ends: 1317 [2021-11-02 22:27:53,587 INFO L226 Difference]: Without dead ends: 1237 [2021-11-02 22:27:53,588 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-11-02 22:27:53,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2021-11-02 22:27:53,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 246. [2021-11-02 22:27:53,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 1.1020408163265305) internal successors, (270), 245 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:53,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 270 transitions. [2021-11-02 22:27:53,620 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 270 transitions. Word has length 191 [2021-11-02 22:27:53,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:27:53,621 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 270 transitions. [2021-11-02 22:27:53,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.805555555555555) internal successors, (173), 35 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:53,621 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 270 transitions. [2021-11-02 22:27:53,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-11-02 22:27:53,622 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:53,623 INFO L513 BasicCegarLoop]: trace histogram [35, 35, 35, 34, 34, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:27:53,648 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-11-02 22:27:53,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-02 22:27:53,847 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:27:53,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:53,848 INFO L85 PathProgramCache]: Analyzing trace with hash 810578257, now seen corresponding path program 12 times [2021-11-02 22:27:53,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:53,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558806694] [2021-11-02 22:27:53,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:53,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:53,872 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:27:53,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2049120886] [2021-11-02 22:27:53,873 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:27:53,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:27:53,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:27:53,878 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:27:53,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-02 22:27:55,561 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-02 22:27:55,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:27:55,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-02 22:27:55,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:27:57,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-02 22:27:57,179 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-02 22:27:57,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-02 22:28:10,664 WARN L860 $PredicateComparison]: unable to prove that (and (= (mod (mod (mod (+ c_ULTIMATE.start_main_~i~0 4294967295) 4294967296) 3) 4294967296) 0) (= c_~N~0 1000)) is different from true [2021-11-02 22:28:33,446 INFO L134 CoverageAnalysis]: Checked inductivity of 3056 backedges. 0 proven. 267 refuted. 2 times theorem prover too weak. 2752 trivial. 35 not checked. [2021-11-02 22:28:33,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:28:33,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558806694] [2021-11-02 22:28:33,448 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:28:33,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049120886] [2021-11-02 22:28:33,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049120886] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:28:33,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:28:33,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-02 22:28:33,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310447461] [2021-11-02 22:28:33,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:28:33,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:28:33,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:28:33,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=44, Unknown=8, NotChecked=14, Total=90 [2021-11-02 22:28:33,450 INFO L87 Difference]: Start difference. First operand 246 states and 270 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:28:59,371 WARN L207 SmtUtils]: Spent 11.57 s on a formula simplification that was a NOOP. DAG size: 21 [2021-11-02 22:29:46,505 WARN L860 $PredicateComparison]: unable to prove that (and (= (mod (mod (mod (+ c_ULTIMATE.start_main_~i~0 4294967295) 4294967296) 3) 4294967296) 0) (= c_~N~0 1000) (= c_ULTIMATE.start_main_~R~0 3)) is different from true [2021-11-02 22:30:33,018 WARN L207 SmtUtils]: Spent 17.53 s on a formula simplification that was a NOOP. DAG size: 29 [2021-11-02 22:30:44,014 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (mod (mod (mod c_ULTIMATE.start_main_~i~0 4294967296) 3) 4294967296))) (and (= (mod (mod (mod (+ c_ULTIMATE.start_main_~i~0 4294967295) 4294967296) 3) 4294967296) 0) (= c_~N~0 1000) (= |c_ULTIMATE.start_main_#t~mem9| .cse0) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0.base|) (+ |c_ULTIMATE.start_main_~#a~0.offset| (* c_ULTIMATE.start_main_~i~0 4))) .cse0) (= c_ULTIMATE.start_main_~R~0 3) (< c_ULTIMATE.start_main_~i~0 c_~N~0))) is different from true [2021-11-02 22:31:48,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:31:48,601 INFO L93 Difference]: Finished difference Result 335 states and 376 transitions. [2021-11-02 22:31:48,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-02 22:31:48,826 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 206 [2021-11-02 22:31:48,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:31:48,828 INFO L225 Difference]: With dead ends: 335 [2021-11-02 22:31:48,828 INFO L226 Difference]: Without dead ends: 302 [2021-11-02 22:31:48,829 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 120.6s TimeCoverageRelationStatistics Valid=78, Invalid=141, Unknown=33, NotChecked=90, Total=342 [2021-11-02 22:31:48,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-11-02 22:31:48,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 255. [2021-11-02 22:31:48,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.1023622047244095) internal successors, (280), 254 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:31:48,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 280 transitions. [2021-11-02 22:31:48,856 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 280 transitions. Word has length 206 [2021-11-02 22:31:48,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:31:48,857 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 280 transitions. [2021-11-02 22:31:48,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:31:48,857 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 280 transitions. [2021-11-02 22:31:48,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-11-02 22:31:48,859 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:31:48,859 INFO L513 BasicCegarLoop]: trace histogram [35, 35, 35, 34, 33, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:31:48,877 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-11-02 22:31:49,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:31:49,078 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:31:49,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:31:49,080 INFO L85 PathProgramCache]: Analyzing trace with hash 773758987, now seen corresponding path program 13 times [2021-11-02 22:31:49,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:31:49,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733517389] [2021-11-02 22:31:49,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:31:49,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:31:49,102 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:31:49,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [627648426] [2021-11-02 22:31:49,103 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:31:49,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:31:49,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:31:49,104 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:31:49,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-02 22:31:50,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:50,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-02 22:31:50,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:31:53,735 INFO L134 CoverageAnalysis]: Checked inductivity of 3056 backedges. 0 proven. 3010 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-02 22:31:53,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:31:53,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733517389] [2021-11-02 22:31:53,736 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:31:53,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627648426] [2021-11-02 22:31:53,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627648426] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:31:53,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:31:53,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2021-11-02 22:31:53,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362223212] [2021-11-02 22:31:53,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-02 22:31:53,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:31:53,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-02 22:31:53,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-11-02 22:31:53,739 INFO L87 Difference]: Start difference. First operand 255 states and 280 transitions. Second operand has 39 states, 39 states have (on average 4.82051282051282) internal successors, (188), 38 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:31:55,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:31:55,155 INFO L93 Difference]: Finished difference Result 1446 states and 1700 transitions. [2021-11-02 22:31:55,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-02 22:31:55,157 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.82051282051282) internal successors, (188), 38 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 206 [2021-11-02 22:31:55,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:31:55,163 INFO L225 Difference]: With dead ends: 1446 [2021-11-02 22:31:55,163 INFO L226 Difference]: Without dead ends: 1357 [2021-11-02 22:31:55,164 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-11-02 22:31:55,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1357 states. [2021-11-02 22:31:55,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1357 to 270. [2021-11-02 22:31:55,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 1.096654275092937) internal successors, (295), 269 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:31:55,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 295 transitions. [2021-11-02 22:31:55,197 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 295 transitions. Word has length 206 [2021-11-02 22:31:55,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:31:55,198 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 295 transitions. [2021-11-02 22:31:55,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.82051282051282) internal successors, (188), 38 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:31:55,199 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 295 transitions. [2021-11-02 22:31:55,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-11-02 22:31:55,200 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:31:55,201 INFO L513 BasicCegarLoop]: trace histogram [38, 38, 38, 37, 36, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:31:55,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-02 22:31:55,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-02 22:31:55,429 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:31:55,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:31:55,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1109051446, now seen corresponding path program 14 times [2021-11-02 22:31:55,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:31:55,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397088411] [2021-11-02 22:31:55,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:31:55,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:31:55,473 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:31:55,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [145852956] [2021-11-02 22:31:55,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:31:55,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:31:55,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:31:55,476 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:31:55,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-02 22:31:57,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:31:57,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:31:57,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-02 22:31:57,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:32:00,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3599 backedges. 0 proven. 3553 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-02 22:32:00,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:32:00,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397088411] [2021-11-02 22:32:00,457 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:32:00,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145852956] [2021-11-02 22:32:00,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145852956] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:32:00,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:32:00,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2021-11-02 22:32:00,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749526802] [2021-11-02 22:32:00,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-02 22:32:00,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:32:00,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-02 22:32:00,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-11-02 22:32:00,463 INFO L87 Difference]: Start difference. First operand 270 states and 295 transitions. Second operand has 42 states, 42 states have (on average 4.833333333333333) internal successors, (203), 41 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:32:02,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:32:02,103 INFO L93 Difference]: Finished difference Result 1557 states and 1829 transitions. [2021-11-02 22:32:02,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-02 22:32:02,105 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 4.833333333333333) internal successors, (203), 41 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 221 [2021-11-02 22:32:02,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:32:02,114 INFO L225 Difference]: With dead ends: 1557 [2021-11-02 22:32:02,114 INFO L226 Difference]: Without dead ends: 1468 [2021-11-02 22:32:02,117 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-11-02 22:32:02,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1468 states. [2021-11-02 22:32:02,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1468 to 285. [2021-11-02 22:32:02,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 1.091549295774648) internal successors, (310), 284 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:32:02,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 310 transitions. [2021-11-02 22:32:02,153 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 310 transitions. Word has length 221 [2021-11-02 22:32:02,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:32:02,154 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 310 transitions. [2021-11-02 22:32:02,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 4.833333333333333) internal successors, (203), 41 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:32:02,154 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 310 transitions. [2021-11-02 22:32:02,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-11-02 22:32:02,156 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:32:02,157 INFO L513 BasicCegarLoop]: trace histogram [41, 41, 41, 40, 39, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:32:02,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-02 22:32:02,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-02 22:32:02,379 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:32:02,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:32:02,380 INFO L85 PathProgramCache]: Analyzing trace with hash -456530773, now seen corresponding path program 15 times [2021-11-02 22:32:02,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:32:02,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009366647] [2021-11-02 22:32:02,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:32:02,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:32:02,412 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:32:02,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2031997138] [2021-11-02 22:32:02,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:32:02,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:32:02,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:32:02,414 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:32:02,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-02 22:32:04,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-02 22:32:04,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:32:04,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 22:32:04,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:32:05,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 537 proven. 13 refuted. 0 times theorem prover too weak. 3637 trivial. 0 not checked. [2021-11-02 22:32:05,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:32:05,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009366647] [2021-11-02 22:32:05,926 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:32:05,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031997138] [2021-11-02 22:32:05,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031997138] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:32:05,927 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:32:05,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-02 22:32:05,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009977213] [2021-11-02 22:32:05,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:32:05,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:32:05,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:32:05,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:32:05,928 INFO L87 Difference]: Start difference. First operand 285 states and 310 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:32:06,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:32:06,260 INFO L93 Difference]: Finished difference Result 426 states and 484 transitions. [2021-11-02 22:32:06,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 22:32:06,261 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 236 [2021-11-02 22:32:06,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:32:06,263 INFO L225 Difference]: With dead ends: 426 [2021-11-02 22:32:06,263 INFO L226 Difference]: Without dead ends: 393 [2021-11-02 22:32:06,264 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:32:06,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-11-02 22:32:06,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 300. [2021-11-02 22:32:06,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 1.1070234113712374) internal successors, (331), 299 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:32:06,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 331 transitions. [2021-11-02 22:32:06,299 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 331 transitions. Word has length 236 [2021-11-02 22:32:06,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:32:06,299 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 331 transitions. [2021-11-02 22:32:06,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:32:06,300 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 331 transitions. [2021-11-02 22:32:06,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-11-02 22:32:06,302 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:32:06,302 INFO L513 BasicCegarLoop]: trace histogram [42, 42, 42, 40, 39, 5, 5, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:32:06,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-02 22:32:06,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-02 22:32:06,509 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:32:06,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:32:06,509 INFO L85 PathProgramCache]: Analyzing trace with hash -339147278, now seen corresponding path program 16 times [2021-11-02 22:32:06,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:32:06,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013247909] [2021-11-02 22:32:06,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:32:06,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:32:06,532 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:32:06,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1194674240] [2021-11-02 22:32:06,533 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:32:06,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:32:06,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:32:06,534 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:32:06,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-02 22:32:10,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:32:10,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:32:10,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-02 22:32:10,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:32:13,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4393 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-02 22:32:13,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:32:13,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013247909] [2021-11-02 22:32:13,660 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:32:13,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194674240] [2021-11-02 22:32:13,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194674240] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:32:13,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:32:13,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2021-11-02 22:32:13,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407155315] [2021-11-02 22:32:13,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-02 22:32:13,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:32:13,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-02 22:32:13,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-11-02 22:32:13,664 INFO L87 Difference]: Start difference. First operand 300 states and 331 transitions. Second operand has 46 states, 46 states have (on average 4.8478260869565215) internal successors, (223), 45 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:32:15,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:32:15,326 INFO L93 Difference]: Finished difference Result 1735 states and 2044 transitions. [2021-11-02 22:32:15,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-02 22:32:15,328 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.8478260869565215) internal successors, (223), 45 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 241 [2021-11-02 22:32:15,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:32:15,342 INFO L225 Difference]: With dead ends: 1735 [2021-11-02 22:32:15,342 INFO L226 Difference]: Without dead ends: 1631 [2021-11-02 22:32:15,344 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-11-02 22:32:15,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2021-11-02 22:32:15,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 320. [2021-11-02 22:32:15,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 1.1003134796238245) internal successors, (351), 319 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:32:15,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 351 transitions. [2021-11-02 22:32:15,382 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 351 transitions. Word has length 241 [2021-11-02 22:32:15,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:32:15,382 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 351 transitions. [2021-11-02 22:32:15,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.8478260869565215) internal successors, (223), 45 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:32:15,383 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 351 transitions. [2021-11-02 22:32:15,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2021-11-02 22:32:15,385 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:32:15,385 INFO L513 BasicCegarLoop]: trace histogram [46, 46, 46, 44, 43, 5, 5, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:32:15,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-02 22:32:15,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-02 22:32:15,605 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:32:15,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:32:15,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1000466482, now seen corresponding path program 17 times [2021-11-02 22:32:15,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:32:15,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727770340] [2021-11-02 22:32:15,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:32:15,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:32:15,645 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:32:15,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1964397340] [2021-11-02 22:32:15,646 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:32:15,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:32:15,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:32:15,647 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:32:15,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2a7a49f-32c0-4bbf-b316-5a483e0fb7cb/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process