./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench/egcd2-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench/egcd2-ll.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0 --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 ed6536c9cb0e4b2be9a327fc4a25c6bfba6e98b1dfb78e314dd25bca8cbdb087 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 14:51:14,095 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 14:51:14,098 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 14:51:14,170 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 14:51:14,170 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 14:51:14,176 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 14:51:14,178 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 14:51:14,182 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 14:51:14,185 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 14:51:14,193 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 14:51:14,195 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 14:51:14,197 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 14:51:14,197 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 14:51:14,200 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 14:51:14,202 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 14:51:14,208 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 14:51:14,210 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 14:51:14,212 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 14:51:14,218 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 14:51:14,225 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 14:51:14,227 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 14:51:14,229 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 14:51:14,233 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 14:51:14,234 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 14:51:14,242 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 14:51:14,243 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 14:51:14,243 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 14:51:14,244 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 14:51:14,245 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 14:51:14,246 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 14:51:14,247 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 14:51:14,247 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 14:51:14,248 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 14:51:14,249 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 14:51:14,250 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 14:51:14,251 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 14:51:14,252 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 14:51:14,252 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 14:51:14,252 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 14:51:14,253 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 14:51:14,254 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 14:51:14,255 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 14:51:14,284 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 14:51:14,284 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 14:51:14,285 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 14:51:14,285 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 14:51:14,286 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 14:51:14,286 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 14:51:14,287 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 14:51:14,287 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 14:51:14,287 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 14:51:14,287 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 14:51:14,288 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 14:51:14,288 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 14:51:14,288 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 14:51:14,288 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 14:51:14,289 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 14:51:14,289 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 14:51:14,289 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 14:51:14,289 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 14:51:14,289 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 14:51:14,290 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 14:51:14,290 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 14:51:14,290 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 14:51:14,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 14:51:14,291 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 14:51:14,291 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 14:51:14,291 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 14:51:14,291 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 14:51:14,292 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 14:51:14,292 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 14:51:14,292 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 14:51:14,292 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 14:51:14,292 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 14:51:14,293 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_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ed6536c9cb0e4b2be9a327fc4a25c6bfba6e98b1dfb78e314dd25bca8cbdb087 [2021-11-22 14:51:14,566 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 14:51:14,588 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 14:51:14,591 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 14:51:14,592 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 14:51:14,593 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 14:51:14,595 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/nla-digbench/egcd2-ll.c [2021-11-22 14:51:14,683 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/data/f93b0318d/54af56c02e6e4d06a389725c3afda5d3/FLAGc306531e4 [2021-11-22 14:51:15,187 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 14:51:15,188 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/sv-benchmarks/c/nla-digbench/egcd2-ll.c [2021-11-22 14:51:15,195 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/data/f93b0318d/54af56c02e6e4d06a389725c3afda5d3/FLAGc306531e4 [2021-11-22 14:51:15,533 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/data/f93b0318d/54af56c02e6e4d06a389725c3afda5d3 [2021-11-22 14:51:15,536 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 14:51:15,539 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 14:51:15,542 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 14:51:15,542 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 14:51:15,546 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 14:51:15,547 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:51:15" (1/1) ... [2021-11-22 14:51:15,551 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71fe7ea7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:51:15, skipping insertion in model container [2021-11-22 14:51:15,551 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:51:15" (1/1) ... [2021-11-22 14:51:15,559 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 14:51:15,582 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 14:51:15,774 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/sv-benchmarks/c/nla-digbench/egcd2-ll.c[490,503] [2021-11-22 14:51:15,795 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 14:51:15,804 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 14:51:15,818 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/sv-benchmarks/c/nla-digbench/egcd2-ll.c[490,503] [2021-11-22 14:51:15,828 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 14:51:15,842 INFO L208 MainTranslator]: Completed translation [2021-11-22 14:51:15,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:51:15 WrapperNode [2021-11-22 14:51:15,843 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 14:51:15,845 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 14:51:15,845 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 14:51:15,845 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 14:51:15,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:51:15" (1/1) ... [2021-11-22 14:51:15,861 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:51:15" (1/1) ... [2021-11-22 14:51:15,885 INFO L137 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 117 [2021-11-22 14:51:15,885 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 14:51:15,886 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 14:51:15,886 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 14:51:15,887 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 14:51:15,896 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:51:15" (1/1) ... [2021-11-22 14:51:15,896 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:51:15" (1/1) ... [2021-11-22 14:51:15,898 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:51:15" (1/1) ... [2021-11-22 14:51:15,899 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:51:15" (1/1) ... [2021-11-22 14:51:15,903 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:51:15" (1/1) ... [2021-11-22 14:51:15,908 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:51:15" (1/1) ... [2021-11-22 14:51:15,925 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:51:15" (1/1) ... [2021-11-22 14:51:15,928 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 14:51:15,929 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 14:51:15,929 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 14:51:15,929 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 14:51:15,931 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:51:15" (1/1) ... [2021-11-22 14:51:15,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 14:51:15,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:51:15,962 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 14:51:15,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 14:51:16,017 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 14:51:16,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 14:51:16,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 14:51:16,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 14:51:16,090 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 14:51:16,092 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 14:51:16,285 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 14:51:16,308 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 14:51:16,309 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-22 14:51:16,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:51:16 BoogieIcfgContainer [2021-11-22 14:51:16,311 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 14:51:16,324 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 14:51:16,325 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 14:51:16,328 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 14:51:16,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:51:15" (1/3) ... [2021-11-22 14:51:16,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e563021 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:51:16, skipping insertion in model container [2021-11-22 14:51:16,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:51:15" (2/3) ... [2021-11-22 14:51:16,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e563021 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:51:16, skipping insertion in model container [2021-11-22 14:51:16,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:51:16" (3/3) ... [2021-11-22 14:51:16,332 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll.c [2021-11-22 14:51:16,362 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 14:51:16,362 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-22 14:51:16,413 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 14:51:16,421 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 [2021-11-22 14:51:16,421 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-22 14:51:16,439 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 42 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) [2021-11-22 14:51:16,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-22 14:51:16,446 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:51:16,447 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:51:16,447 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 14:51:16,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:51:16,454 INFO L85 PathProgramCache]: Analyzing trace with hash -174514722, now seen corresponding path program 1 times [2021-11-22 14:51:16,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:51:16,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556237231] [2021-11-22 14:51:16,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:51:16,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:51:16,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:51:16,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:51:16,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:51:16,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556237231] [2021-11-22 14:51:16,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556237231] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:51:16,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:51:16,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 14:51:16,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256195430] [2021-11-22 14:51:16,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:51:16,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-22 14:51:16,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:51:16,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-22 14:51:16,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 14:51:16,657 INFO L87 Difference]: Start difference. First operand has 43 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 42 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) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:51:16,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:51:16,678 INFO L93 Difference]: Finished difference Result 83 states and 112 transitions. [2021-11-22 14:51:16,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-22 14:51:16,683 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-22 14:51:16,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:51:16,693 INFO L225 Difference]: With dead ends: 83 [2021-11-22 14:51:16,694 INFO L226 Difference]: Without dead ends: 39 [2021-11-22 14:51:16,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 14:51:16,717 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:51:16,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:51:16,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-22 14:51:16,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-11-22 14:51:16,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 38 states have internal predecessors, (40), 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) [2021-11-22 14:51:16,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-11-22 14:51:16,773 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 14 [2021-11-22 14:51:16,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:51:16,774 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-11-22 14:51:16,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:51:16,784 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-11-22 14:51:16,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-22 14:51:16,785 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:51:16,786 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:51:16,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 14:51:16,787 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 14:51:16,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:51:16,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1454153634, now seen corresponding path program 1 times [2021-11-22 14:51:16,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:51:16,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875757431] [2021-11-22 14:51:16,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:51:16,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:51:16,825 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 14:51:16,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [699630033] [2021-11-22 14:51:16,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:51:16,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:51:16,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:51:16,832 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:51:16,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 14:51:16,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:51:16,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-22 14:51:16,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:51:17,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:51:17,098 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 14:51:17,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:51:17,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875757431] [2021-11-22 14:51:17,098 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 14:51:17,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699630033] [2021-11-22 14:51:17,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699630033] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:51:17,099 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:51:17,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 14:51:17,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226262160] [2021-11-22 14:51:17,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:51:17,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 14:51:17,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:51:17,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 14:51:17,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:51:17,103 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) [2021-11-22 14:51:17,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:51:17,236 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2021-11-22 14:51:17,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 14:51:17,237 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 15 [2021-11-22 14:51:17,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:51:17,238 INFO L225 Difference]: With dead ends: 68 [2021-11-22 14:51:17,239 INFO L226 Difference]: Without dead ends: 60 [2021-11-22 14:51:17,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:51:17,241 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 76 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:51:17,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 74 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:51:17,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-22 14:51:17,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 41. [2021-11-22 14:51:17,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 35 states have (on average 1.2) internal successors, (42), 40 states have internal predecessors, (42), 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) [2021-11-22 14:51:17,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2021-11-22 14:51:17,253 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 15 [2021-11-22 14:51:17,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:51:17,253 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2021-11-22 14:51:17,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) [2021-11-22 14:51:17,254 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2021-11-22 14:51:17,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-22 14:51:17,254 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:51:17,255 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:51:17,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 14:51:17,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:51:17,475 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 14:51:17,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:51:17,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1454156615, now seen corresponding path program 1 times [2021-11-22 14:51:17,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:51:17,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354984899] [2021-11-22 14:51:17,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:51:17,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:51:17,517 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 14:51:17,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [666187770] [2021-11-22 14:51:17,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:51:17,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:51:17,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:51:17,526 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:51:17,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 14:51:17,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:51:17,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-22 14:51:17,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:51:17,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:51:17,685 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 14:51:17,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:51:17,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354984899] [2021-11-22 14:51:17,686 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 14:51:17,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666187770] [2021-11-22 14:51:17,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666187770] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:51:17,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:51:17,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 14:51:17,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648203786] [2021-11-22 14:51:17,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:51:17,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 14:51:17,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:51:17,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 14:51:17,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:51:17,694 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2021-11-22 14:51:17,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:51:17,796 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2021-11-22 14:51:17,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 14:51:17,797 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 15 [2021-11-22 14:51:17,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:51:17,802 INFO L225 Difference]: With dead ends: 60 [2021-11-22 14:51:17,802 INFO L226 Difference]: Without dead ends: 58 [2021-11-22 14:51:17,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:51:17,809 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 16 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:51:17,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 85 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:51:17,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-22 14:51:17,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 43. [2021-11-22 14:51:17,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 42 states have internal predecessors, (44), 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) [2021-11-22 14:51:17,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-11-22 14:51:17,837 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 15 [2021-11-22 14:51:17,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:51:17,838 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-11-22 14:51:17,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2021-11-22 14:51:17,839 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-11-22 14:51:17,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-22 14:51:17,840 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:51:17,840 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:51:17,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-22 14:51:18,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:51:18,063 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 14:51:18,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:51:18,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1580292682, now seen corresponding path program 1 times [2021-11-22 14:51:18,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:51:18,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394295570] [2021-11-22 14:51:18,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:51:18,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:51:18,078 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 14:51:18,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [230742149] [2021-11-22 14:51:18,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:51:18,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:51:18,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:51:18,081 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:51:18,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 14:51:18,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:51:18,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-22 14:51:18,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:51:18,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:51:18,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 14:51:18,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:51:18,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394295570] [2021-11-22 14:51:18,450 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 14:51:18,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230742149] [2021-11-22 14:51:18,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230742149] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:51:18,451 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:51:18,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-22 14:51:18,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335177276] [2021-11-22 14:51:18,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:51:18,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 14:51:18,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:51:18,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 14:51:18,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:51:18,453 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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) [2021-11-22 14:51:18,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:51:18,577 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2021-11-22 14:51:18,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-22 14:51:18,578 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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 17 [2021-11-22 14:51:18,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:51:18,579 INFO L225 Difference]: With dead ends: 64 [2021-11-22 14:51:18,579 INFO L226 Difference]: Without dead ends: 62 [2021-11-22 14:51:18,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-22 14:51:18,582 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 69 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:51:18,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 94 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:51:18,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-22 14:51:18,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2021-11-22 14:51:18,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 54 states have internal predecessors, (60), 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) [2021-11-22 14:51:18,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2021-11-22 14:51:18,592 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 17 [2021-11-22 14:51:18,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:51:18,593 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2021-11-22 14:51:18,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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) [2021-11-22 14:51:18,593 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2021-11-22 14:51:18,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-22 14:51:18,594 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:51:18,594 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:51:18,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-22 14:51:18,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:51:18,809 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 14:51:18,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:51:18,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1756998163, now seen corresponding path program 1 times [2021-11-22 14:51:18,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:51:18,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929137529] [2021-11-22 14:51:18,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:51:18,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:51:18,822 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 14:51:18,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1991847243] [2021-11-22 14:51:18,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:51:18,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:51:18,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:51:18,832 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:51:18,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-22 14:51:18,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:51:18,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-22 14:51:18,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:51:19,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:51:19,238 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 14:51:19,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:51:19,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929137529] [2021-11-22 14:51:19,239 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 14:51:19,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991847243] [2021-11-22 14:51:19,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991847243] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:51:19,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:51:19,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-22 14:51:19,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792536588] [2021-11-22 14:51:19,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:51:19,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 14:51:19,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:51:19,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 14:51:19,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-22 14:51:19,244 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:51:19,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:51:19,376 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2021-11-22 14:51:19,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 14:51:19,377 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-22 14:51:19,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:51:19,382 INFO L225 Difference]: With dead ends: 62 [2021-11-22 14:51:19,382 INFO L226 Difference]: Without dead ends: 60 [2021-11-22 14:51:19,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-22 14:51:19,385 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 63 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:51:19,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 86 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:51:19,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-22 14:51:19,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2021-11-22 14:51:19,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 54 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) [2021-11-22 14:51:19,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2021-11-22 14:51:19,405 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 19 [2021-11-22 14:51:19,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:51:19,406 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2021-11-22 14:51:19,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:51:19,406 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2021-11-22 14:51:19,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-22 14:51:19,407 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:51:19,407 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:51:19,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-22 14:51:19,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:51:19,608 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 14:51:19,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:51:19,609 INFO L85 PathProgramCache]: Analyzing trace with hash -552929744, now seen corresponding path program 1 times [2021-11-22 14:51:19,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:51:19,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112212885] [2021-11-22 14:51:19,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:51:19,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:51:19,619 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 14:51:19,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1820159180] [2021-11-22 14:51:19,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:51:19,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:51:19,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:51:19,621 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:51:19,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-22 14:51:19,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:51:19,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-22 14:51:19,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:51:20,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:51:20,070 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 14:51:20,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:51:20,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112212885] [2021-11-22 14:51:20,071 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 14:51:20,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820159180] [2021-11-22 14:51:20,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820159180] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:51:20,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:51:20,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-22 14:51:20,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144893582] [2021-11-22 14:51:20,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:51:20,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 14:51:20,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:51:20,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 14:51:20,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:51:20,074 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 7 states, 7 states have (on average 3.0) 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) [2021-11-22 14:51:20,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:51:20,220 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2021-11-22 14:51:20,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-22 14:51:20,221 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) 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 21 [2021-11-22 14:51:20,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:51:20,222 INFO L225 Difference]: With dead ends: 64 [2021-11-22 14:51:20,222 INFO L226 Difference]: Without dead ends: 62 [2021-11-22 14:51:20,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-22 14:51:20,223 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 68 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:51:20,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 94 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:51:20,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-22 14:51:20,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2021-11-22 14:51:20,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.183673469387755) internal successors, (58), 54 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) [2021-11-22 14:51:20,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2021-11-22 14:51:20,234 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 21 [2021-11-22 14:51:20,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:51:20,234 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2021-11-22 14:51:20,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) 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) [2021-11-22 14:51:20,235 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2021-11-22 14:51:20,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-22 14:51:20,236 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:51:20,236 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:51:20,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-22 14:51:20,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:51:20,453 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 14:51:20,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:51:20,453 INFO L85 PathProgramCache]: Analyzing trace with hash -531607006, now seen corresponding path program 1 times [2021-11-22 14:51:20,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:51:20,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711417264] [2021-11-22 14:51:20,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:51:20,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:51:20,462 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 14:51:20,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [28140822] [2021-11-22 14:51:20,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:51:20,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:51:20,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:51:20,484 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:51:20,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-22 14:51:20,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:51:20,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-22 14:51:20,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:51:20,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:51:20,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:51:20,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:51:20,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:51:20,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711417264] [2021-11-22 14:51:20,797 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 14:51:20,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28140822] [2021-11-22 14:51:20,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28140822] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:51:20,798 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:51:20,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-22 14:51:20,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336016600] [2021-11-22 14:51:20,798 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 14:51:20,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 14:51:20,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:51:20,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 14:51:20,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-22 14:51:20,800 INFO L87 Difference]: Start difference. First operand 55 states and 58 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) [2021-11-22 14:51:20,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:51:20,995 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2021-11-22 14:51:20,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-22 14:51:20,996 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 25 [2021-11-22 14:51:20,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:51:20,997 INFO L225 Difference]: With dead ends: 105 [2021-11-22 14:51:20,997 INFO L226 Difference]: Without dead ends: 103 [2021-11-22 14:51:20,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-22 14:51:20,999 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 48 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:51:20,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 131 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 14:51:21,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-22 14:51:21,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 49. [2021-11-22 14:51:21,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 48 states have internal predecessors, (51), 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) [2021-11-22 14:51:21,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2021-11-22 14:51:21,008 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 25 [2021-11-22 14:51:21,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:51:21,009 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2021-11-22 14:51:21,009 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) [2021-11-22 14:51:21,009 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2021-11-22 14:51:21,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-22 14:51:21,010 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:51:21,010 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:51:21,045 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-22 14:51:21,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-22 14:51:21,237 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 14:51:21,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:51:21,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1833624938, now seen corresponding path program 1 times [2021-11-22 14:51:21,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:51:21,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726878095] [2021-11-22 14:51:21,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:51:21,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:51:21,247 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 14:51:21,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1793576792] [2021-11-22 14:51:21,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:51:21,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:51:21,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:51:21,248 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:51:21,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-22 14:51:21,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:51:21,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-22 14:51:21,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:51:21,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:51:21,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:51:21,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:51:21,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:51:21,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726878095] [2021-11-22 14:51:21,529 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 14:51:21,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793576792] [2021-11-22 14:51:21,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793576792] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:51:21,529 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:51:21,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-11-22 14:51:21,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043364396] [2021-11-22 14:51:21,530 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 14:51:21,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-22 14:51:21,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:51:21,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-22 14:51:21,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-22 14:51:21,531 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:51:21,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:51:21,700 INFO L93 Difference]: Finished difference Result 146 states and 153 transitions. [2021-11-22 14:51:21,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-22 14:51:21,701 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-22 14:51:21,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:51:21,704 INFO L225 Difference]: With dead ends: 146 [2021-11-22 14:51:21,704 INFO L226 Difference]: Without dead ends: 138 [2021-11-22 14:51:21,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-11-22 14:51:21,705 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 240 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:51:21,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 164 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:51:21,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-22 14:51:21,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 95. [2021-11-22 14:51:21,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.2333333333333334) internal successors, (111), 94 states have internal predecessors, (111), 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) [2021-11-22 14:51:21,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 111 transitions. [2021-11-22 14:51:21,738 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 111 transitions. Word has length 28 [2021-11-22 14:51:21,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:51:21,738 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 111 transitions. [2021-11-22 14:51:21,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:51:21,739 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 111 transitions. [2021-11-22 14:51:21,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-22 14:51:21,741 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:51:21,742 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:51:21,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-22 14:51:21,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-22 14:51:21,957 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 14:51:21,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:51:21,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1173952450, now seen corresponding path program 1 times [2021-11-22 14:51:21,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:51:21,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662665507] [2021-11-22 14:51:21,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:51:21,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:51:21,966 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 14:51:21,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2130745043] [2021-11-22 14:51:21,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:51:21,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:51:21,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:51:21,967 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:51:21,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-22 14:51:22,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:51:22,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-22 14:51:22,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:51:22,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:51:22,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:51:22,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:51:22,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:51:22,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662665507] [2021-11-22 14:51:22,422 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 14:51:22,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130745043] [2021-11-22 14:51:22,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130745043] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-22 14:51:22,423 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 14:51:22,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 10 [2021-11-22 14:51:22,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719005105] [2021-11-22 14:51:22,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:51:22,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 14:51:22,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:51:22,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 14:51:22,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-22 14:51:22,428 INFO L87 Difference]: Start difference. First operand 95 states and 111 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:51:22,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:51:22,664 INFO L93 Difference]: Finished difference Result 104 states and 121 transitions. [2021-11-22 14:51:22,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 14:51:22,665 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-22 14:51:22,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:51:22,667 INFO L225 Difference]: With dead ends: 104 [2021-11-22 14:51:22,667 INFO L226 Difference]: Without dead ends: 96 [2021-11-22 14:51:22,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-11-22 14:51:22,669 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 63 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:51:22,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 47 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 14:51:22,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-22 14:51:22,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2021-11-22 14:51:22,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 92 states have (on average 1.1630434782608696) internal successors, (107), 94 states have internal predecessors, (107), 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) [2021-11-22 14:51:22,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 107 transitions. [2021-11-22 14:51:22,690 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 107 transitions. Word has length 30 [2021-11-22 14:51:22,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:51:22,690 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 107 transitions. [2021-11-22 14:51:22,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:51:22,691 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 107 transitions. [2021-11-22 14:51:22,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-22 14:51:22,692 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:51:22,692 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:51:22,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-22 14:51:22,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:51:22,921 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 14:51:22,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:51:22,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1408251617, now seen corresponding path program 1 times [2021-11-22 14:51:22,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:51:22,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888820204] [2021-11-22 14:51:22,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:51:22,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:51:22,930 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 14:51:22,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1259599221] [2021-11-22 14:51:22,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:51:22,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:51:22,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:51:22,935 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:51:22,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-22 14:51:23,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:51:23,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-22 14:51:23,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:51:23,710 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:51:23,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:51:24,028 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:51:24,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:51:24,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888820204] [2021-11-22 14:51:24,029 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 14:51:24,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259599221] [2021-11-22 14:51:24,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259599221] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:51:24,029 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:51:24,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 15 [2021-11-22 14:51:24,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725239273] [2021-11-22 14:51:24,030 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 14:51:24,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-22 14:51:24,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:51:24,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-22 14:51:24,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-11-22 14:51:24,031 INFO L87 Difference]: Start difference. First operand 95 states and 107 transitions. Second operand has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 15 states have internal predecessors, (61), 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) [2021-11-22 14:51:25,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:51:25,767 INFO L93 Difference]: Finished difference Result 124 states and 140 transitions. [2021-11-22 14:51:25,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-22 14:51:25,768 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 15 states have internal predecessors, (61), 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 32 [2021-11-22 14:51:25,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:51:25,770 INFO L225 Difference]: With dead ends: 124 [2021-11-22 14:51:25,770 INFO L226 Difference]: Without dead ends: 122 [2021-11-22 14:51:25,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2021-11-22 14:51:25,772 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 184 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-22 14:51:25,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 100 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-22 14:51:25,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-22 14:51:25,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 87. [2021-11-22 14:51:25,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 85 states have (on average 1.1411764705882352) internal successors, (97), 86 states have internal predecessors, (97), 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) [2021-11-22 14:51:25,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 97 transitions. [2021-11-22 14:51:25,798 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 97 transitions. Word has length 32 [2021-11-22 14:51:25,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:51:25,798 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 97 transitions. [2021-11-22 14:51:25,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 15 states have internal predecessors, (61), 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) [2021-11-22 14:51:25,799 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 97 transitions. [2021-11-22 14:51:25,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-22 14:51:25,800 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:51:25,800 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:51:25,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-22 14:51:26,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-22 14:51:26,024 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 14:51:26,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:51:26,025 INFO L85 PathProgramCache]: Analyzing trace with hash 415263268, now seen corresponding path program 1 times [2021-11-22 14:51:26,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:51:26,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731088597] [2021-11-22 14:51:26,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:51:26,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:51:26,037 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 14:51:26,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1958590303] [2021-11-22 14:51:26,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:51:26,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:51:26,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:51:26,041 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:51:26,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-22 14:51:26,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:51:26,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-22 14:51:26,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:51:32,698 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:51:32,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:51:34,079 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:51:34,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:51:34,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731088597] [2021-11-22 14:51:34,080 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 14:51:34,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958590303] [2021-11-22 14:51:34,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958590303] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:51:34,080 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:51:34,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-11-22 14:51:34,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953904003] [2021-11-22 14:51:34,081 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 14:51:34,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-22 14:51:34,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:51:34,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-22 14:51:34,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-11-22 14:51:34,082 INFO L87 Difference]: Start difference. First operand 87 states and 97 transitions. Second operand has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 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) [2021-11-22 14:51:55,549 WARN L227 SmtUtils]: Spent 5.17s on a formula simplification. DAG size of input: 59 DAG size of output: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 14:52:36,411 WARN L227 SmtUtils]: Spent 9.15s on a formula simplification. DAG size of input: 63 DAG size of output: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 14:53:00,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:53:00,282 INFO L93 Difference]: Finished difference Result 175 states and 197 transitions. [2021-11-22 14:53:00,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-22 14:53:00,283 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 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 34 [2021-11-22 14:53:00,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:53:00,285 INFO L225 Difference]: With dead ends: 175 [2021-11-22 14:53:00,285 INFO L226 Difference]: Without dead ends: 173 [2021-11-22 14:53:00,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 82.9s TimeCoverageRelationStatistics Valid=614, Invalid=1545, Unknown=3, NotChecked=0, Total=2162 [2021-11-22 14:53:00,287 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 583 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-11-22 14:53:00,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [583 Valid, 91 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2021-11-22 14:53:00,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-22 14:53:00,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 132. [2021-11-22 14:53:00,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 130 states have (on average 1.1076923076923078) internal successors, (144), 131 states have internal predecessors, (144), 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) [2021-11-22 14:53:00,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 144 transitions. [2021-11-22 14:53:00,334 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 144 transitions. Word has length 34 [2021-11-22 14:53:00,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:53:00,334 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 144 transitions. [2021-11-22 14:53:00,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 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) [2021-11-22 14:53:00,334 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 144 transitions. [2021-11-22 14:53:00,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-22 14:53:00,336 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:53:00,336 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:53:00,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-22 14:53:00,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:53:00,540 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 14:53:00,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:53:00,541 INFO L85 PathProgramCache]: Analyzing trace with hash 325758875, now seen corresponding path program 1 times [2021-11-22 14:53:00,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:53:00,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929410609] [2021-11-22 14:53:00,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:53:00,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:53:00,551 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 14:53:00,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [786567625] [2021-11-22 14:53:00,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:53:00,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:53:00,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:53:00,554 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:53:00,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-22 14:53:00,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:53:00,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-22 14:53:00,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:53:01,503 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:53:01,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:53:02,156 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:53:02,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:53:02,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929410609] [2021-11-22 14:53:02,156 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 14:53:02,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786567625] [2021-11-22 14:53:02,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786567625] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:53:02,157 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:53:02,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-11-22 14:53:02,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165811590] [2021-11-22 14:53:02,157 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 14:53:02,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-22 14:53:02,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:53:02,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-22 14:53:02,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-11-22 14:53:02,159 INFO L87 Difference]: Start difference. First operand 132 states and 144 transitions. Second operand has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 17 states have internal predecessors, (69), 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) [2021-11-22 14:53:05,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:53:05,406 INFO L93 Difference]: Finished difference Result 260 states and 285 transitions. [2021-11-22 14:53:05,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-22 14:53:05,407 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 17 states have internal predecessors, (69), 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 38 [2021-11-22 14:53:05,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:53:05,409 INFO L225 Difference]: With dead ends: 260 [2021-11-22 14:53:05,409 INFO L226 Difference]: Without dead ends: 254 [2021-11-22 14:53:05,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=584, Invalid=2068, Unknown=0, NotChecked=0, Total=2652 [2021-11-22 14:53:05,413 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 294 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-22 14:53:05,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 192 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-22 14:53:05,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-11-22 14:53:05,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 155. [2021-11-22 14:53:05,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 153 states have (on average 1.091503267973856) internal successors, (167), 154 states have internal predecessors, (167), 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) [2021-11-22 14:53:05,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 167 transitions. [2021-11-22 14:53:05,478 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 167 transitions. Word has length 38 [2021-11-22 14:53:05,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:53:05,478 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 167 transitions. [2021-11-22 14:53:05,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 17 states have internal predecessors, (69), 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) [2021-11-22 14:53:05,479 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 167 transitions. [2021-11-22 14:53:05,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-22 14:53:05,481 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:53:05,481 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:53:05,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-22 14:53:05,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:53:05,688 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 14:53:05,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:53:05,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1861112430, now seen corresponding path program 1 times [2021-11-22 14:53:05,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:53:05,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783143800] [2021-11-22 14:53:05,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:53:05,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:53:05,697 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 14:53:05,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2072771932] [2021-11-22 14:53:05,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:53:05,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:53:05,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:53:05,699 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:53:05,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-22 14:53:05,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:53:05,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-22 14:53:05,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:53:07,976 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:53:07,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:53:59,469 WARN L227 SmtUtils]: Spent 9.21s on a formula simplification that was a NOOP. DAG size: 77 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 14:54:27,066 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:54:27,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:54:27,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783143800] [2021-11-22 14:54:27,067 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 14:54:27,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072771932] [2021-11-22 14:54:27,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072771932] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:54:27,067 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:54:27,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 33 [2021-11-22 14:54:27,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944528670] [2021-11-22 14:54:27,068 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 14:54:27,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-22 14:54:27,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:54:27,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-22 14:54:27,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=758, Unknown=7, NotChecked=0, Total=1056 [2021-11-22 14:54:27,070 INFO L87 Difference]: Start difference. First operand 155 states and 167 transitions. Second operand has 33 states, 33 states have (on average 3.0606060606060606) internal successors, (101), 33 states have internal predecessors, (101), 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) [2021-11-22 14:54:32,080 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 14:54:33,273 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 14:54:35,363 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 14:54:48,031 WARN L227 SmtUtils]: Spent 9.67s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 14:55:04,097 WARN L227 SmtUtils]: Spent 8.76s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 14:55:05,179 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 14:55:25,617 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 14:55:27,113 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 14:55:38,422 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 14:55:40,428 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 14:55:43,271 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 14:55:45,273 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 14:55:47,277 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 14:55:48,768 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 14:55:57,360 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 14:56:10,854 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 14:56:12,857 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 14:56:32,195 WARN L227 SmtUtils]: Spent 8.83s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 14:56:56,974 WARN L227 SmtUtils]: Spent 22.50s on a formula simplification that was a NOOP. DAG size: 74 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 14:56:58,746 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 14:57:10,250 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 14:57:12,260 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 14:57:14,263 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 14:57:16,268 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 14:57:18,274 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 14:57:20,374 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 14:57:30,203 WARN L227 SmtUtils]: Spent 5.25s on a formula simplification that was a NOOP. DAG size: 59 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 14:57:56,894 WARN L227 SmtUtils]: Spent 10.47s on a formula simplification that was a NOOP. DAG size: 59 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 14:58:09,727 WARN L227 SmtUtils]: Spent 9.10s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 14:58:19,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:58:19,420 INFO L93 Difference]: Finished difference Result 253 states and 272 transitions. [2021-11-22 14:58:19,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-22 14:58:19,421 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.0606060606060606) internal successors, (101), 33 states have internal predecessors, (101), 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 54 [2021-11-22 14:58:19,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:58:19,423 INFO L225 Difference]: With dead ends: 253 [2021-11-22 14:58:19,423 INFO L226 Difference]: Without dead ends: 251 [2021-11-22 14:58:19,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 81 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 253.4s TimeCoverageRelationStatistics Valid=977, Invalid=2542, Unknown=21, NotChecked=0, Total=3540 [2021-11-22 14:58:19,427 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 337 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 106 mSolverCounterUnsat, 15 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 15 IncrementalHoareTripleChecker+Unknown, 206 IncrementalHoareTripleChecker+Unchecked, 49.3s IncrementalHoareTripleChecker+Time [2021-11-22 14:58:19,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 290 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 583 Invalid, 15 Unknown, 206 Unchecked, 49.3s Time] [2021-11-22 14:58:19,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-11-22 14:58:19,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 154. [2021-11-22 14:58:19,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 152 states have (on average 1.0921052631578947) internal successors, (166), 153 states have internal predecessors, (166), 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) [2021-11-22 14:58:19,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 166 transitions. [2021-11-22 14:58:19,503 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 166 transitions. Word has length 54 [2021-11-22 14:58:19,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:58:19,504 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 166 transitions. [2021-11-22 14:58:19,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.0606060606060606) internal successors, (101), 33 states have internal predecessors, (101), 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) [2021-11-22 14:58:19,504 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 166 transitions. [2021-11-22 14:58:19,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-22 14:58:19,506 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:58:19,506 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:58:19,541 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-22 14:58:19,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-22 14:58:19,720 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 14:58:19,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:58:19,721 INFO L85 PathProgramCache]: Analyzing trace with hash -988334612, now seen corresponding path program 2 times [2021-11-22 14:58:19,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:58:19,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539895652] [2021-11-22 14:58:19,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:58:19,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:58:19,727 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 14:58:19,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [513419670] [2021-11-22 14:58:19,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 14:58:19,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:58:19,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:58:19,731 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:58:19,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-22 14:58:19,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 14:58:19,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:58:19,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-22 14:58:19,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:58:22,519 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:58:22,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:58:32,974 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-22 14:58:32,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:58:32,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539895652] [2021-11-22 14:58:32,975 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 14:58:32,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513419670] [2021-11-22 14:58:32,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513419670] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-22 14:58:32,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 14:58:32,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [21] total 32 [2021-11-22 14:58:32,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603529097] [2021-11-22 14:58:32,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:58:32,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-22 14:58:32,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:58:32,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-22 14:58:32,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=759, Unknown=0, NotChecked=0, Total=992 [2021-11-22 14:58:32,978 INFO L87 Difference]: Start difference. First operand 154 states and 166 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 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) [2021-11-22 14:58:41,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:58:41,326 INFO L93 Difference]: Finished difference Result 154 states and 166 transitions. [2021-11-22 14:58:41,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-22 14:58:41,327 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 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 [2021-11-22 14:58:41,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:58:41,328 INFO L225 Difference]: With dead ends: 154 [2021-11-22 14:58:41,329 INFO L226 Difference]: Without dead ends: 150 [2021-11-22 14:58:41,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=479, Invalid=1327, Unknown=0, NotChecked=0, Total=1806 [2021-11-22 14:58:41,330 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 52 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:58:41,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 73 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-22 14:58:41,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-22 14:58:41,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 91. [2021-11-22 14:58:41,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.0777777777777777) internal successors, (97), 90 states have internal predecessors, (97), 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) [2021-11-22 14:58:41,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 97 transitions. [2021-11-22 14:58:41,371 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 97 transitions. Word has length 61 [2021-11-22 14:58:41,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:58:41,372 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 97 transitions. [2021-11-22 14:58:41,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 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) [2021-11-22 14:58:41,372 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 97 transitions. [2021-11-22 14:58:41,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-22 14:58:41,373 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:58:41,373 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:58:41,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-22 14:58:41,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-22 14:58:41,574 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 14:58:41,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:58:41,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1890887184, now seen corresponding path program 2 times [2021-11-22 14:58:41,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:58:41,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840869511] [2021-11-22 14:58:41,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:58:41,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:58:41,584 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 14:58:41,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [828572747] [2021-11-22 14:58:41,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 14:58:41,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:58:41,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:58:41,591 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:58:41,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-22 14:58:42,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-22 14:58:42,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:58:42,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-22 14:58:42,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:58:47,441 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-22 14:58:47,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:58:51,234 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 12 refuted. 20 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-22 14:58:51,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:58:51,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840869511] [2021-11-22 14:58:51,235 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 14:58:51,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828572747] [2021-11-22 14:58:51,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828572747] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:58:51,235 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:58:51,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 15 [2021-11-22 14:58:51,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042328418] [2021-11-22 14:58:51,236 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 14:58:51,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-22 14:58:51,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:58:51,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-22 14:58:51,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=155, Unknown=1, NotChecked=0, Total=210 [2021-11-22 14:58:51,237 INFO L87 Difference]: Start difference. First operand 91 states and 97 transitions. Second operand has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 15 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) [2021-11-22 14:58:53,524 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 14:58:55,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:58:55,233 INFO L93 Difference]: Finished difference Result 97 states and 103 transitions. [2021-11-22 14:58:55,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-22 14:58:55,234 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 15 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) Word has length 67 [2021-11-22 14:58:55,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:58:55,234 INFO L225 Difference]: With dead ends: 97 [2021-11-22 14:58:55,234 INFO L226 Difference]: Without dead ends: 0 [2021-11-22 14:58:55,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=98, Invalid=281, Unknown=1, NotChecked=0, Total=380 [2021-11-22 14:58:55,236 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 109 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-22 14:58:55,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 44 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 82 Invalid, 0 Unknown, 11 Unchecked, 3.4s Time] [2021-11-22 14:58:55,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-22 14:58:55,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-22 14:58:55,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:58:55,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-22 14:58:55,239 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 67 [2021-11-22 14:58:55,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:58:55,239 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-22 14:58:55,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 15 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) [2021-11-22 14:58:55,239 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-22 14:58:55,239 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-22 14:58:55,242 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2021-11-22 14:58:55,243 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2021-11-22 14:58:55,243 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2021-11-22 14:58:55,243 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2021-11-22 14:58:55,243 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2021-11-22 14:58:55,244 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2021-11-22 14:58:55,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-22 14:58:55,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bc92534-5caa-4cc0-886c-0f2e2b65074b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-22 14:58:55,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-22 14:59:15,973 WARN L227 SmtUtils]: Spent 10.25s on a formula simplification. DAG size of input: 185 DAG size of output: 60 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-22 15:00:42,676 WARN L227 SmtUtils]: Spent 1.44m on a formula simplification. DAG size of input: 270 DAG size of output: 54 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-22 15:02:54,582 WARN L227 SmtUtils]: Spent 2.20m on a formula simplification. DAG size of input: 253 DAG size of output: 44 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-22 15:04:48,877 WARN L227 SmtUtils]: Spent 1.90m on a formula simplification. DAG size of input: 251 DAG size of output: 44 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-22 15:05:34,579 WARN L227 SmtUtils]: Spent 45.70s on a formula simplification. DAG size of input: 235 DAG size of output: 43 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter)