./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b0dc7e6cdf006545b97e616af165994b39a2e54c024b52d6607380c5e84ee914 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 20:32:36,280 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 20:32:36,282 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 20:32:36,305 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 20:32:36,305 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 20:32:36,306 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 20:32:36,307 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 20:32:36,309 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 20:32:36,311 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 20:32:36,312 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 20:32:36,313 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 20:32:36,314 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 20:32:36,314 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 20:32:36,321 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 20:32:36,323 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 20:32:36,325 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 20:32:36,326 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 20:32:36,327 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 20:32:36,329 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 20:32:36,331 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 20:32:36,333 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 20:32:36,335 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 20:32:36,336 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 20:32:36,337 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 20:32:36,340 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 20:32:36,341 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 20:32:36,341 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 20:32:36,342 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 20:32:36,343 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 20:32:36,348 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 20:32:36,348 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 20:32:36,349 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 20:32:36,350 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 20:32:36,351 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 20:32:36,352 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 20:32:36,352 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 20:32:36,352 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 20:32:36,353 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 20:32:36,353 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 20:32:36,354 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 20:32:36,354 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 20:32:36,355 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 20:32:36,372 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 20:32:36,372 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 20:32:36,372 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 20:32:36,373 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 20:32:36,373 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 20:32:36,373 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 20:32:36,374 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 20:32:36,374 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 20:32:36,374 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 20:32:36,374 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 20:32:36,374 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 20:32:36,374 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 20:32:36,374 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 20:32:36,374 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 20:32:36,374 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 20:32:36,375 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 20:32:36,375 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 20:32:36,375 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 20:32:36,375 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 20:32:36,375 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 20:32:36,375 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 20:32:36,375 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 20:32:36,375 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 20:32:36,375 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 20:32:36,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:32:36,376 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 20:32:36,376 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 20:32:36,376 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 20:32:36,376 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 20:32:36,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 20:32:36,376 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 20:32:36,376 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 20:32:36,376 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 20:32:36,377 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 20:32:36,377 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_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b0dc7e6cdf006545b97e616af165994b39a2e54c024b52d6607380c5e84ee914 [2021-12-06 20:32:36,554 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 20:32:36,569 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 20:32:36,570 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 20:32:36,571 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 20:32:36,572 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 20:32:36,573 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound20.c [2021-12-06 20:32:36,614 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/data/751b57023/03aa2b1540af4dcb9288bdcd7e7f4844/FLAG5562012d4 [2021-12-06 20:32:36,979 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 20:32:36,980 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound20.c [2021-12-06 20:32:36,984 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/data/751b57023/03aa2b1540af4dcb9288bdcd7e7f4844/FLAG5562012d4 [2021-12-06 20:32:36,996 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/data/751b57023/03aa2b1540af4dcb9288bdcd7e7f4844 [2021-12-06 20:32:36,998 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 20:32:36,999 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 20:32:37,000 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 20:32:37,001 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 20:32:37,003 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 20:32:37,004 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:32:36" (1/1) ... [2021-12-06 20:32:37,005 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f70e6ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:32:37, skipping insertion in model container [2021-12-06 20:32:37,005 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:32:36" (1/1) ... [2021-12-06 20:32:37,010 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 20:32:37,020 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 20:32:37,119 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_f392c808-c577-4ca1-be93-eca7d06e86af/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound20.c[526,539] [2021-12-06 20:32:37,131 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:32:37,137 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 20:32:37,147 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_f392c808-c577-4ca1-be93-eca7d06e86af/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound20.c[526,539] [2021-12-06 20:32:37,152 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:32:37,162 INFO L208 MainTranslator]: Completed translation [2021-12-06 20:32:37,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:32:37 WrapperNode [2021-12-06 20:32:37,163 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 20:32:37,163 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 20:32:37,163 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 20:32:37,164 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 20:32:37,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:32:37" (1/1) ... [2021-12-06 20:32:37,174 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:32:37" (1/1) ... [2021-12-06 20:32:37,188 INFO L137 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 61 [2021-12-06 20:32:37,189 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 20:32:37,189 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 20:32:37,189 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 20:32:37,190 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 20:32:37,196 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:32:37" (1/1) ... [2021-12-06 20:32:37,196 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:32:37" (1/1) ... [2021-12-06 20:32:37,197 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:32:37" (1/1) ... [2021-12-06 20:32:37,197 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:32:37" (1/1) ... [2021-12-06 20:32:37,200 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:32:37" (1/1) ... [2021-12-06 20:32:37,203 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:32:37" (1/1) ... [2021-12-06 20:32:37,203 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:32:37" (1/1) ... [2021-12-06 20:32:37,205 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 20:32:37,205 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 20:32:37,205 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 20:32:37,206 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 20:32:37,206 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:32:37" (1/1) ... [2021-12-06 20:32:37,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:32:37,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:32:37,234 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 20:32:37,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 20:32:37,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 20:32:37,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 20:32:37,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 20:32:37,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 20:32:37,274 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-06 20:32:37,274 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-06 20:32:37,327 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 20:32:37,328 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 20:32:37,408 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 20:32:37,413 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 20:32:37,413 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 20:32:37,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:32:37 BoogieIcfgContainer [2021-12-06 20:32:37,415 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 20:32:37,416 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 20:32:37,417 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 20:32:37,419 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 20:32:37,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 08:32:36" (1/3) ... [2021-12-06 20:32:37,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@474e552c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:32:37, skipping insertion in model container [2021-12-06 20:32:37,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:32:37" (2/3) ... [2021-12-06 20:32:37,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@474e552c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:32:37, skipping insertion in model container [2021-12-06 20:32:37,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:32:37" (3/3) ... [2021-12-06 20:32:37,421 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound20.c [2021-12-06 20:32:37,425 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 20:32:37,425 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 20:32:37,462 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 20:32:37,467 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 20:32:37,467 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 20:32:37,480 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-06 20:32:37,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-06 20:32:37,483 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:32:37,483 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:32:37,484 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:32:37,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:32:37,488 INFO L85 PathProgramCache]: Analyzing trace with hash 643118537, now seen corresponding path program 1 times [2021-12-06 20:32:37,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:32:37,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711710415] [2021-12-06 20:32:37,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:32:37,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:32:37,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:37,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:32:37,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:32:37,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711710415] [2021-12-06 20:32:37,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711710415] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:32:37,598 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:32:37,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 20:32:37,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932442516] [2021-12-06 20:32:37,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:32:37,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 20:32:37,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:32:37,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 20:32:37,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 20:32:37,638 INFO L87 Difference]: Start difference. First operand has 26 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:32:37,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:32:37,660 INFO L93 Difference]: Finished difference Result 50 states and 83 transitions. [2021-12-06 20:32:37,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 20:32:37,662 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-06 20:32:37,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:32:37,670 INFO L225 Difference]: With dead ends: 50 [2021-12-06 20:32:37,671 INFO L226 Difference]: Without dead ends: 22 [2021-12-06 20:32:37,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 20:32:37,677 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:32:37,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:32:37,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-06 20:32:37,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-12-06 20:32:37,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 20:32:37,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 32 transitions. [2021-12-06 20:32:37,710 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 32 transitions. Word has length 8 [2021-12-06 20:32:37,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:32:37,710 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 32 transitions. [2021-12-06 20:32:37,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:32:37,710 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 32 transitions. [2021-12-06 20:32:37,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-06 20:32:37,711 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:32:37,711 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:32:37,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 20:32:37,711 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:32:37,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:32:37,712 INFO L85 PathProgramCache]: Analyzing trace with hash 181060127, now seen corresponding path program 1 times [2021-12-06 20:32:37,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:32:37,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730894613] [2021-12-06 20:32:37,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:32:37,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:32:37,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:37,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:32:37,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:32:37,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730894613] [2021-12-06 20:32:37,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730894613] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:32:37,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:32:37,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 20:32:37,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629335889] [2021-12-06 20:32:37,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:32:37,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 20:32:37,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:32:37,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 20:32:37,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:32:37,786 INFO L87 Difference]: Start difference. First operand 22 states and 32 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:32:37,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:32:37,826 INFO L93 Difference]: Finished difference Result 36 states and 51 transitions. [2021-12-06 20:32:37,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 20:32:37,827 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-06 20:32:37,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:32:37,828 INFO L225 Difference]: With dead ends: 36 [2021-12-06 20:32:37,828 INFO L226 Difference]: Without dead ends: 34 [2021-12-06 20:32:37,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 20:32:37,830 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 15 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:32:37,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 105 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:32:37,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-06 20:32:37,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2021-12-06 20:32:37,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 20:32:37,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2021-12-06 20:32:37,841 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 8 [2021-12-06 20:32:37,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:32:37,841 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2021-12-06 20:32:37,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:32:37,842 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2021-12-06 20:32:37,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-06 20:32:37,842 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:32:37,842 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:32:37,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 20:32:37,843 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:32:37,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:32:37,843 INFO L85 PathProgramCache]: Analyzing trace with hash -712280900, now seen corresponding path program 1 times [2021-12-06 20:32:37,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:32:37,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279162015] [2021-12-06 20:32:37,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:32:37,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:32:37,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:37,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:32:37,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:32:37,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279162015] [2021-12-06 20:32:37,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279162015] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:32:37,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:32:37,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:32:37,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633588089] [2021-12-06 20:32:37,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:32:37,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:32:37,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:32:37,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:32:37,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:32:37,882 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:32:37,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:32:37,898 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2021-12-06 20:32:37,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:32:37,899 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-06 20:32:37,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:32:37,900 INFO L225 Difference]: With dead ends: 42 [2021-12-06 20:32:37,900 INFO L226 Difference]: Without dead ends: 28 [2021-12-06 20:32:37,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:32:37,902 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:32:37,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 85 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:32:37,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-06 20:32:37,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-12-06 20:32:37,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 20:32:37,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2021-12-06 20:32:37,908 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 10 [2021-12-06 20:32:37,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:32:37,908 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2021-12-06 20:32:37,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:32:37,908 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2021-12-06 20:32:37,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 20:32:37,909 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:32:37,909 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:32:37,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 20:32:37,909 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:32:37,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:32:37,910 INFO L85 PathProgramCache]: Analyzing trace with hash 2036073049, now seen corresponding path program 1 times [2021-12-06 20:32:37,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:32:37,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420947672] [2021-12-06 20:32:37,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:32:37,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:32:37,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:37,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:32:37,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:37,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:32:37,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:32:37,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420947672] [2021-12-06 20:32:37,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420947672] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:32:37,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:32:37,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 20:32:37,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380371709] [2021-12-06 20:32:37,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:32:37,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 20:32:37,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:32:37,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 20:32:37,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:32:37,970 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 20:32:38,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:32:38,002 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2021-12-06 20:32:38,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 20:32:38,003 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-12-06 20:32:38,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:32:38,004 INFO L225 Difference]: With dead ends: 42 [2021-12-06 20:32:38,004 INFO L226 Difference]: Without dead ends: 40 [2021-12-06 20:32:38,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 20:32:38,006 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 13 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:32:38,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 101 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:32:38,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-06 20:32:38,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2021-12-06 20:32:38,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 20:32:38,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2021-12-06 20:32:38,014 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 13 [2021-12-06 20:32:38,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:32:38,015 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2021-12-06 20:32:38,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 20:32:38,015 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2021-12-06 20:32:38,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-06 20:32:38,016 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:32:38,016 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:32:38,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 20:32:38,017 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:32:38,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:32:38,017 INFO L85 PathProgramCache]: Analyzing trace with hash 380169759, now seen corresponding path program 1 times [2021-12-06 20:32:38,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:32:38,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349639844] [2021-12-06 20:32:38,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:32:38,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:32:38,029 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:32:38,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [362382663] [2021-12-06 20:32:38,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:32:38,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:32:38,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:32:38,031 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:32:38,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 20:32:38,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:38,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 20:32:38,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:32:38,172 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 20:32:38,172 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:32:38,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:32:38,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349639844] [2021-12-06 20:32:38,172 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:32:38,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362382663] [2021-12-06 20:32:38,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362382663] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:32:38,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:32:38,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 20:32:38,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955219933] [2021-12-06 20:32:38,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:32:38,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 20:32:38,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:32:38,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 20:32:38,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:32:38,174 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 20:32:38,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:32:38,213 INFO L93 Difference]: Finished difference Result 61 states and 83 transitions. [2021-12-06 20:32:38,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 20:32:38,213 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-12-06 20:32:38,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:32:38,214 INFO L225 Difference]: With dead ends: 61 [2021-12-06 20:32:38,214 INFO L226 Difference]: Without dead ends: 46 [2021-12-06 20:32:38,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 20:32:38,215 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 10 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:32:38,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 115 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:32:38,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-06 20:32:38,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-12-06 20:32:38,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 30 states have internal predecessors, (36), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-06 20:32:38,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2021-12-06 20:32:38,223 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 18 [2021-12-06 20:32:38,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:32:38,223 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2021-12-06 20:32:38,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 20:32:38,224 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2021-12-06 20:32:38,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-06 20:32:38,224 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:32:38,225 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:32:38,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 20:32:38,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:32:38,427 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:32:38,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:32:38,429 INFO L85 PathProgramCache]: Analyzing trace with hash -461064832, now seen corresponding path program 1 times [2021-12-06 20:32:38,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:32:38,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693557387] [2021-12-06 20:32:38,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:32:38,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:32:38,461 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:32:38,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2062549153] [2021-12-06 20:32:38,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:32:38,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:32:38,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:32:38,466 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:32:38,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 20:32:38,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:38,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 20:32:38,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:32:38,656 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 20:32:38,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:32:38,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:32:38,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693557387] [2021-12-06 20:32:38,656 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:32:38,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062549153] [2021-12-06 20:32:38,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062549153] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:32:38,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:32:38,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 20:32:38,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588709643] [2021-12-06 20:32:38,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:32:38,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 20:32:38,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:32:38,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 20:32:38,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:32:38,658 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 20:32:38,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:32:38,691 INFO L93 Difference]: Finished difference Result 60 states and 79 transitions. [2021-12-06 20:32:38,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 20:32:38,692 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2021-12-06 20:32:38,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:32:38,693 INFO L225 Difference]: With dead ends: 60 [2021-12-06 20:32:38,693 INFO L226 Difference]: Without dead ends: 52 [2021-12-06 20:32:38,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 20:32:38,694 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 11 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:32:38,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 87 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:32:38,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-06 20:32:38,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2021-12-06 20:32:38,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.28125) internal successors, (41), 34 states have internal predecessors, (41), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-06 20:32:38,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2021-12-06 20:32:38,701 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 26 [2021-12-06 20:32:38,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:32:38,701 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2021-12-06 20:32:38,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 20:32:38,701 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2021-12-06 20:32:38,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-06 20:32:38,702 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:32:38,702 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:32:38,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 20:32:38,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-06 20:32:38,904 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:32:38,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:32:38,906 INFO L85 PathProgramCache]: Analyzing trace with hash -909290541, now seen corresponding path program 1 times [2021-12-06 20:32:38,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:32:38,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338320464] [2021-12-06 20:32:38,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:32:38,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:32:38,934 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:32:38,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1110223495] [2021-12-06 20:32:38,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:32:38,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:32:38,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:32:38,937 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:32:38,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 20:32:38,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:38,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 20:32:38,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:32:39,018 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-06 20:32:39,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:32:39,071 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-06 20:32:39,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:32:39,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338320464] [2021-12-06 20:32:39,072 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:32:39,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110223495] [2021-12-06 20:32:39,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110223495] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:32:39,072 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:32:39,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-12-06 20:32:39,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086291785] [2021-12-06 20:32:39,073 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:32:39,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 20:32:39,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:32:39,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 20:32:39,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-06 20:32:39,074 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-06 20:32:39,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:32:39,143 INFO L93 Difference]: Finished difference Result 140 states and 173 transitions. [2021-12-06 20:32:39,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 20:32:39,143 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 33 [2021-12-06 20:32:39,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:32:39,145 INFO L225 Difference]: With dead ends: 140 [2021-12-06 20:32:39,145 INFO L226 Difference]: Without dead ends: 115 [2021-12-06 20:32:39,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-06 20:32:39,152 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 50 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:32:39,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 153 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:32:39,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-06 20:32:39,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 108. [2021-12-06 20:32:39,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 73 states have internal predecessors, (85), 23 states have call successors, (23), 14 states have call predecessors, (23), 14 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-06 20:32:39,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 129 transitions. [2021-12-06 20:32:39,165 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 129 transitions. Word has length 33 [2021-12-06 20:32:39,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:32:39,165 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 129 transitions. [2021-12-06 20:32:39,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-06 20:32:39,165 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 129 transitions. [2021-12-06 20:32:39,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-06 20:32:39,166 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:32:39,166 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-06 20:32:39,186 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 20:32:39,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-06 20:32:39,368 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:32:39,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:32:39,370 INFO L85 PathProgramCache]: Analyzing trace with hash 252591112, now seen corresponding path program 1 times [2021-12-06 20:32:39,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:32:39,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859721015] [2021-12-06 20:32:39,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:32:39,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:32:39,398 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:32:39,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [639412205] [2021-12-06 20:32:39,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:32:39,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:32:39,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:32:39,403 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:32:39,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 20:32:39,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:39,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 20:32:39,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:32:39,562 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-06 20:32:39,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:32:39,625 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 20:32:39,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:32:39,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859721015] [2021-12-06 20:32:39,626 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:32:39,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639412205] [2021-12-06 20:32:39,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639412205] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 20:32:39,626 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 20:32:39,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2021-12-06 20:32:39,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599393989] [2021-12-06 20:32:39,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:32:39,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 20:32:39,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:32:39,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 20:32:39,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:32:39,627 INFO L87 Difference]: Start difference. First operand 108 states and 129 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 20:32:39,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:32:39,915 INFO L93 Difference]: Finished difference Result 125 states and 150 transitions. [2021-12-06 20:32:39,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 20:32:39,915 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2021-12-06 20:32:39,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:32:39,916 INFO L225 Difference]: With dead ends: 125 [2021-12-06 20:32:39,916 INFO L226 Difference]: Without dead ends: 121 [2021-12-06 20:32:39,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-06 20:32:39,917 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 11 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:32:39,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 97 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 20:32:39,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-06 20:32:39,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2021-12-06 20:32:39,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 77 states have (on average 1.1818181818181819) internal successors, (91), 80 states have internal predecessors, (91), 25 states have call successors, (25), 16 states have call predecessors, (25), 15 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2021-12-06 20:32:39,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 139 transitions. [2021-12-06 20:32:39,930 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 139 transitions. Word has length 36 [2021-12-06 20:32:39,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:32:39,930 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 139 transitions. [2021-12-06 20:32:39,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 20:32:39,930 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 139 transitions. [2021-12-06 20:32:39,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-06 20:32:39,931 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:32:39,932 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:32:39,951 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 20:32:40,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:32:40,134 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:32:40,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:32:40,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1605675221, now seen corresponding path program 1 times [2021-12-06 20:32:40,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:32:40,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808035941] [2021-12-06 20:32:40,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:32:40,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:32:40,146 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:32:40,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1503821518] [2021-12-06 20:32:40,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:32:40,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:32:40,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:32:40,148 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:32:40,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 20:32:40,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:40,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 20:32:40,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:32:40,251 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-06 20:32:40,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:32:40,309 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-06 20:32:40,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:32:40,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808035941] [2021-12-06 20:32:40,309 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:32:40,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503821518] [2021-12-06 20:32:40,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503821518] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:32:40,309 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:32:40,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-12-06 20:32:40,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231533043] [2021-12-06 20:32:40,309 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:32:40,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 20:32:40,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:32:40,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 20:32:40,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-06 20:32:40,311 INFO L87 Difference]: Start difference. First operand 118 states and 139 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-12-06 20:32:40,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:32:40,403 INFO L93 Difference]: Finished difference Result 241 states and 294 transitions. [2021-12-06 20:32:40,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 20:32:40,403 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 49 [2021-12-06 20:32:40,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:32:40,405 INFO L225 Difference]: With dead ends: 241 [2021-12-06 20:32:40,405 INFO L226 Difference]: Without dead ends: 220 [2021-12-06 20:32:40,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-12-06 20:32:40,406 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 80 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:32:40,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 268 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:32:40,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-12-06 20:32:40,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 213. [2021-12-06 20:32:40,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 138 states have (on average 1.1956521739130435) internal successors, (165), 147 states have internal predecessors, (165), 49 states have call successors, (49), 26 states have call predecessors, (49), 25 states have return successors, (45), 39 states have call predecessors, (45), 45 states have call successors, (45) [2021-12-06 20:32:40,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 259 transitions. [2021-12-06 20:32:40,432 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 259 transitions. Word has length 49 [2021-12-06 20:32:40,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:32:40,432 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 259 transitions. [2021-12-06 20:32:40,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-12-06 20:32:40,433 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 259 transitions. [2021-12-06 20:32:40,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-06 20:32:40,434 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:32:40,434 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:32:40,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 20:32:40,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:32:40,636 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:32:40,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:32:40,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1800695307, now seen corresponding path program 1 times [2021-12-06 20:32:40,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:32:40,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089414138] [2021-12-06 20:32:40,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:32:40,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:32:40,664 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:32:40,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1206527492] [2021-12-06 20:32:40,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:32:40,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:32:40,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:32:40,668 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:32:40,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 20:32:40,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:40,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 20:32:40,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:32:40,947 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-12-06 20:32:40,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:32:41,945 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-12-06 20:32:41,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:32:41,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089414138] [2021-12-06 20:32:41,945 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:32:41,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206527492] [2021-12-06 20:32:41,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206527492] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:32:41,945 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:32:41,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-12-06 20:32:41,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097142776] [2021-12-06 20:32:41,946 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:32:41,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 20:32:41,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:32:41,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 20:32:41,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-06 20:32:41,947 INFO L87 Difference]: Start difference. First operand 213 states and 259 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-12-06 20:32:44,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:32:44,908 INFO L93 Difference]: Finished difference Result 367 states and 475 transitions. [2021-12-06 20:32:44,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 20:32:44,908 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 58 [2021-12-06 20:32:44,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:32:44,911 INFO L225 Difference]: With dead ends: 367 [2021-12-06 20:32:44,911 INFO L226 Difference]: Without dead ends: 299 [2021-12-06 20:32:44,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-12-06 20:32:44,913 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 50 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:32:44,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 241 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 20:32:44,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-12-06 20:32:44,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 270. [2021-12-06 20:32:44,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 184 states have (on average 1.233695652173913) internal successors, (227), 190 states have internal predecessors, (227), 56 states have call successors, (56), 29 states have call predecessors, (56), 29 states have return successors, (54), 50 states have call predecessors, (54), 54 states have call successors, (54) [2021-12-06 20:32:44,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 337 transitions. [2021-12-06 20:32:44,947 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 337 transitions. Word has length 58 [2021-12-06 20:32:44,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:32:44,947 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 337 transitions. [2021-12-06 20:32:44,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-12-06 20:32:44,948 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 337 transitions. [2021-12-06 20:32:44,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-06 20:32:44,949 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:32:44,949 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:32:44,969 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 20:32:45,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:32:45,151 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:32:45,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:32:45,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1688778742, now seen corresponding path program 1 times [2021-12-06 20:32:45,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:32:45,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684608052] [2021-12-06 20:32:45,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:32:45,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:32:45,187 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:32:45,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1802249159] [2021-12-06 20:32:45,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:32:45,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:32:45,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:32:45,191 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:32:45,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 20:32:45,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:45,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-06 20:32:45,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:32:45,598 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 66 proven. 13 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-12-06 20:32:45,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:32:45,784 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-12-06 20:32:45,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:32:45,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684608052] [2021-12-06 20:32:45,784 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:32:45,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802249159] [2021-12-06 20:32:45,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802249159] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:32:45,784 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:32:45,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2021-12-06 20:32:45,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959932433] [2021-12-06 20:32:45,785 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:32:45,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 20:32:45,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:32:45,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 20:32:45,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-12-06 20:32:45,786 INFO L87 Difference]: Start difference. First operand 270 states and 337 transitions. Second operand has 16 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2021-12-06 20:32:46,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:32:46,108 INFO L93 Difference]: Finished difference Result 331 states and 412 transitions. [2021-12-06 20:32:46,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 20:32:46,109 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) Word has length 69 [2021-12-06 20:32:46,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:32:46,111 INFO L225 Difference]: With dead ends: 331 [2021-12-06 20:32:46,111 INFO L226 Difference]: Without dead ends: 235 [2021-12-06 20:32:46,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-12-06 20:32:46,112 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 50 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:32:46,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 260 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 20:32:46,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-12-06 20:32:46,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 219. [2021-12-06 20:32:46,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 149 states have (on average 1.1946308724832215) internal successors, (178), 153 states have internal predecessors, (178), 43 states have call successors, (43), 27 states have call predecessors, (43), 26 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2021-12-06 20:32:46,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 262 transitions. [2021-12-06 20:32:46,131 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 262 transitions. Word has length 69 [2021-12-06 20:32:46,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:32:46,131 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 262 transitions. [2021-12-06 20:32:46,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2021-12-06 20:32:46,131 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 262 transitions. [2021-12-06 20:32:46,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-06 20:32:46,132 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:32:46,133 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:32:46,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 20:32:46,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-06 20:32:46,333 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:32:46,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:32:46,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1687889621, now seen corresponding path program 1 times [2021-12-06 20:32:46,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:32:46,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581399502] [2021-12-06 20:32:46,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:32:46,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:32:46,340 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:32:46,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1439223975] [2021-12-06 20:32:46,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:32:46,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:32:46,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:32:46,342 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:32:46,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 20:32:46,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:46,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 20:32:46,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:32:46,513 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-12-06 20:32:46,514 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:32:46,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:32:46,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581399502] [2021-12-06 20:32:46,514 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:32:46,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439223975] [2021-12-06 20:32:46,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439223975] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:32:46,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:32:46,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 20:32:46,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230242249] [2021-12-06 20:32:46,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:32:46,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 20:32:46,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:32:46,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 20:32:46,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:32:46,515 INFO L87 Difference]: Start difference. First operand 219 states and 262 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-06 20:32:46,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:32:46,584 INFO L93 Difference]: Finished difference Result 238 states and 285 transitions. [2021-12-06 20:32:46,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 20:32:46,584 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 78 [2021-12-06 20:32:46,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:32:46,586 INFO L225 Difference]: With dead ends: 238 [2021-12-06 20:32:46,587 INFO L226 Difference]: Without dead ends: 218 [2021-12-06 20:32:46,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:32:46,588 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 26 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:32:46,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 86 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:32:46,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-12-06 20:32:46,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 213. [2021-12-06 20:32:46,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 146 states have (on average 1.1643835616438356) internal successors, (170), 148 states have internal predecessors, (170), 41 states have call successors, (41), 25 states have call predecessors, (41), 25 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2021-12-06 20:32:46,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 251 transitions. [2021-12-06 20:32:46,616 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 251 transitions. Word has length 78 [2021-12-06 20:32:46,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:32:46,616 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 251 transitions. [2021-12-06 20:32:46,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-06 20:32:46,617 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 251 transitions. [2021-12-06 20:32:46,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-06 20:32:46,618 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:32:46,619 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-12-06 20:32:46,639 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 20:32:46,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-06 20:32:46,820 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:32:46,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:32:46,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1611798954, now seen corresponding path program 2 times [2021-12-06 20:32:46,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:32:46,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893415220] [2021-12-06 20:32:46,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:32:46,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:32:46,831 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:32:46,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [828089087] [2021-12-06 20:32:46,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:32:46,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:32:46,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:32:46,833 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:32:46,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 20:32:47,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:32:47,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:32:47,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-06 20:32:47,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:32:47,378 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-12-06 20:32:47,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:33:05,635 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-12-06 20:33:05,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:33:05,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893415220] [2021-12-06 20:33:05,635 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:33:05,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828089087] [2021-12-06 20:33:05,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828089087] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:33:05,635 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:33:05,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-12-06 20:33:05,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166747415] [2021-12-06 20:33:05,636 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:33:05,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 20:33:05,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:33:05,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 20:33:05,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-12-06 20:33:05,637 INFO L87 Difference]: Start difference. First operand 213 states and 251 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 12 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2021-12-06 20:33:38,906 WARN L227 SmtUtils]: Spent 31.12s on a formula simplification. DAG size of input: 186 DAG size of output: 114 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 20:33:49,551 WARN L227 SmtUtils]: Spent 8.66s on a formula simplification. DAG size of input: 65 DAG size of output: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 20:34:02,677 WARN L227 SmtUtils]: Spent 12.76s on a formula simplification. DAG size of input: 84 DAG size of output: 64 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 20:34:08,613 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:34:10,630 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:34:14,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:34:14,696 INFO L93 Difference]: Finished difference Result 354 states and 467 transitions. [2021-12-06 20:34:14,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 20:34:14,696 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 12 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) Word has length 90 [2021-12-06 20:34:14,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:34:14,698 INFO L225 Difference]: With dead ends: 354 [2021-12-06 20:34:14,698 INFO L226 Difference]: Without dead ends: 297 [2021-12-06 20:34:14,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 61.7s TimeCoverageRelationStatistics Valid=245, Invalid=625, Unknown=0, NotChecked=0, Total=870 [2021-12-06 20:34:14,699 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 188 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 323 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 1100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 323 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:34:14,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 725 Invalid, 1100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [323 Valid, 776 Invalid, 1 Unknown, 0 Unchecked, 10.2s Time] [2021-12-06 20:34:14,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-12-06 20:34:14,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 246. [2021-12-06 20:34:14,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 168 states have (on average 1.2023809523809523) internal successors, (202), 170 states have internal predecessors, (202), 49 states have call successors, (49), 28 states have call predecessors, (49), 28 states have return successors, (48), 47 states have call predecessors, (48), 48 states have call successors, (48) [2021-12-06 20:34:14,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 299 transitions. [2021-12-06 20:34:14,734 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 299 transitions. Word has length 90 [2021-12-06 20:34:14,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:34:14,734 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 299 transitions. [2021-12-06 20:34:14,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 12 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2021-12-06 20:34:14,735 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 299 transitions. [2021-12-06 20:34:14,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-06 20:34:14,736 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:34:14,736 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-12-06 20:34:14,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 20:34:14,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-06 20:34:14,938 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:34:14,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:34:14,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1147408146, now seen corresponding path program 3 times [2021-12-06 20:34:14,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:34:14,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715836532] [2021-12-06 20:34:14,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:34:14,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:34:14,963 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:34:14,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [771572088] [2021-12-06 20:34:14,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:34:14,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:34:14,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:34:14,967 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:34:14,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 20:34:15,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 20:34:15,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:34:15,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 20:34:15,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:34:15,516 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 73 proven. 4 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2021-12-06 20:34:15,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:34:26,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:34:26,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715836532] [2021-12-06 20:34:26,896 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:34:26,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771572088] [2021-12-06 20:34:26,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771572088] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:34:26,896 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 20:34:26,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-12-06 20:34:26,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087798578] [2021-12-06 20:34:26,896 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 20:34:26,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 20:34:26,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:34:26,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 20:34:26,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-06 20:34:26,897 INFO L87 Difference]: Start difference. First operand 246 states and 299 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 20:34:27,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:34:27,071 INFO L93 Difference]: Finished difference Result 256 states and 307 transitions. [2021-12-06 20:34:27,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 20:34:27,071 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 95 [2021-12-06 20:34:27,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:34:27,073 INFO L225 Difference]: With dead ends: 256 [2021-12-06 20:34:27,073 INFO L226 Difference]: Without dead ends: 254 [2021-12-06 20:34:27,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-12-06 20:34:27,074 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:34:27,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 75 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:34:27,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-12-06 20:34:27,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2021-12-06 20:34:27,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 174 states have (on average 1.1954022988505748) internal successors, (208), 176 states have internal predecessors, (208), 49 states have call successors, (49), 30 states have call predecessors, (49), 30 states have return successors, (48), 47 states have call predecessors, (48), 48 states have call successors, (48) [2021-12-06 20:34:27,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 305 transitions. [2021-12-06 20:34:27,109 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 305 transitions. Word has length 95 [2021-12-06 20:34:27,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:34:27,109 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 305 transitions. [2021-12-06 20:34:27,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 20:34:27,109 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 305 transitions. [2021-12-06 20:34:27,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-06 20:34:27,110 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:34:27,110 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:34:27,130 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 20:34:27,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-06 20:34:27,312 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:34:27,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:34:27,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1991126182, now seen corresponding path program 1 times [2021-12-06 20:34:27,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:34:27,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863021774] [2021-12-06 20:34:27,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:34:27,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:34:27,334 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:34:27,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [476608484] [2021-12-06 20:34:27,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:34:27,334 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:34:27,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:34:27,335 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:34:27,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 20:34:27,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:34:27,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 20:34:27,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:34:27,466 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 120 proven. 260 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-06 20:34:27,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:34:27,585 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2021-12-06 20:34:27,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:34:27,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863021774] [2021-12-06 20:34:27,585 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:34:27,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476608484] [2021-12-06 20:34:27,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476608484] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:34:27,585 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:34:27,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-12-06 20:34:27,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639969261] [2021-12-06 20:34:27,586 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:34:27,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 20:34:27,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:34:27,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 20:34:27,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-12-06 20:34:27,587 INFO L87 Difference]: Start difference. First operand 254 states and 305 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 9 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2021-12-06 20:34:27,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:34:27,850 INFO L93 Difference]: Finished difference Result 691 states and 866 transitions. [2021-12-06 20:34:27,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 20:34:27,851 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 9 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) Word has length 96 [2021-12-06 20:34:27,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:34:27,855 INFO L225 Difference]: With dead ends: 691 [2021-12-06 20:34:27,855 INFO L226 Difference]: Without dead ends: 609 [2021-12-06 20:34:27,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2021-12-06 20:34:27,856 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 202 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:34:27,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 346 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:34:27,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2021-12-06 20:34:27,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 531. [2021-12-06 20:34:27,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 356 states have (on average 1.2247191011235956) internal successors, (436), 366 states have internal predecessors, (436), 111 states have call successors, (111), 64 states have call predecessors, (111), 63 states have return successors, (107), 100 states have call predecessors, (107), 107 states have call successors, (107) [2021-12-06 20:34:27,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 654 transitions. [2021-12-06 20:34:27,959 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 654 transitions. Word has length 96 [2021-12-06 20:34:27,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:34:27,960 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 654 transitions. [2021-12-06 20:34:27,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 9 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2021-12-06 20:34:27,960 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 654 transitions. [2021-12-06 20:34:27,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-06 20:34:27,961 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:34:27,961 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:34:27,981 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 20:34:28,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 20:34:28,162 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:34:28,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:34:28,162 INFO L85 PathProgramCache]: Analyzing trace with hash -402850320, now seen corresponding path program 1 times [2021-12-06 20:34:28,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:34:28,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265101454] [2021-12-06 20:34:28,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:34:28,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:34:28,168 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:34:28,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2106955941] [2021-12-06 20:34:28,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:34:28,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:34:28,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:34:28,169 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:34:28,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 20:34:28,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:34:28,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 20:34:28,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:34:28,312 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 414 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-06 20:34:28,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:34:28,436 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 42 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2021-12-06 20:34:28,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:34:28,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265101454] [2021-12-06 20:34:28,436 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:34:28,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106955941] [2021-12-06 20:34:28,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106955941] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:34:28,436 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:34:28,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-12-06 20:34:28,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001327689] [2021-12-06 20:34:28,436 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:34:28,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 20:34:28,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:34:28,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 20:34:28,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2021-12-06 20:34:28,438 INFO L87 Difference]: Start difference. First operand 531 states and 654 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 13 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) [2021-12-06 20:34:28,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:34:28,857 INFO L93 Difference]: Finished difference Result 1011 states and 1268 transitions. [2021-12-06 20:34:28,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-06 20:34:28,858 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 13 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) Word has length 104 [2021-12-06 20:34:28,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:34:28,862 INFO L225 Difference]: With dead ends: 1011 [2021-12-06 20:34:28,862 INFO L226 Difference]: Without dead ends: 976 [2021-12-06 20:34:28,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=259, Invalid=497, Unknown=0, NotChecked=0, Total=756 [2021-12-06 20:34:28,863 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 361 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:34:28,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 464 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:34:28,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2021-12-06 20:34:28,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 959. [2021-12-06 20:34:28,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 652 states have (on average 1.1932515337423313) internal successors, (778), 661 states have internal predecessors, (778), 197 states have call successors, (197), 110 states have call predecessors, (197), 109 states have return successors, (188), 187 states have call predecessors, (188), 188 states have call successors, (188) [2021-12-06 20:34:28,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 1163 transitions. [2021-12-06 20:34:28,991 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 1163 transitions. Word has length 104 [2021-12-06 20:34:28,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:34:28,991 INFO L470 AbstractCegarLoop]: Abstraction has 959 states and 1163 transitions. [2021-12-06 20:34:28,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 13 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) [2021-12-06 20:34:28,992 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 1163 transitions. [2021-12-06 20:34:28,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-06 20:34:28,993 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:34:28,993 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:34:29,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 20:34:29,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 20:34:29,194 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:34:29,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:34:29,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1040094269, now seen corresponding path program 1 times [2021-12-06 20:34:29,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:34:29,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186996602] [2021-12-06 20:34:29,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:34:29,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:34:29,202 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:34:29,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [565652999] [2021-12-06 20:34:29,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:34:29,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:34:29,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:34:29,203 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:34:29,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 20:34:29,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:34:29,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 20:34:29,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:34:29,409 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 32 proven. 34 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2021-12-06 20:34:29,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:34:30,118 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 32 proven. 34 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2021-12-06 20:34:30,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:34:30,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186996602] [2021-12-06 20:34:30,118 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:34:30,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565652999] [2021-12-06 20:34:30,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565652999] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:34:30,118 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:34:30,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-12-06 20:34:30,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704731553] [2021-12-06 20:34:30,119 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:34:30,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 20:34:30,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:34:30,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 20:34:30,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-06 20:34:30,120 INFO L87 Difference]: Start difference. First operand 959 states and 1163 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 6 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) [2021-12-06 20:34:30,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:34:30,450 INFO L93 Difference]: Finished difference Result 961 states and 1164 transitions. [2021-12-06 20:34:30,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 20:34:30,451 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 6 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) Word has length 106 [2021-12-06 20:34:30,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:34:30,455 INFO L225 Difference]: With dead ends: 961 [2021-12-06 20:34:30,458 INFO L226 Difference]: Without dead ends: 951 [2021-12-06 20:34:30,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 200 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-12-06 20:34:30,459 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 3 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:34:30,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 282 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:34:30,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-12-06 20:34:30,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 951. [2021-12-06 20:34:30,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 951 states, 647 states have (on average 1.1916537867078825) internal successors, (771), 656 states have internal predecessors, (771), 195 states have call successors, (195), 108 states have call predecessors, (195), 108 states have return successors, (187), 186 states have call predecessors, (187), 187 states have call successors, (187) [2021-12-06 20:34:30,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 1153 transitions. [2021-12-06 20:34:30,577 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 1153 transitions. Word has length 106 [2021-12-06 20:34:30,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:34:30,577 INFO L470 AbstractCegarLoop]: Abstraction has 951 states and 1153 transitions. [2021-12-06 20:34:30,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 6 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) [2021-12-06 20:34:30,577 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 1153 transitions. [2021-12-06 20:34:30,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-06 20:34:30,578 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:34:30,579 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:34:30,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 20:34:30,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 20:34:30,780 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:34:30,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:34:30,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1392087445, now seen corresponding path program 1 times [2021-12-06 20:34:30,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:34:30,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83731274] [2021-12-06 20:34:30,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:34:30,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:34:30,806 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:34:30,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1219373891] [2021-12-06 20:34:30,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:34:30,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:34:30,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:34:30,810 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:34:30,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 20:34:30,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:34:30,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 20:34:30,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:34:31,079 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 185 proven. 0 refuted. 0 times theorem prover too weak. 375 trivial. 0 not checked. [2021-12-06 20:34:31,080 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:34:31,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:34:31,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83731274] [2021-12-06 20:34:31,080 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:34:31,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219373891] [2021-12-06 20:34:31,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219373891] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:34:31,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:34:31,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 20:34:31,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028039502] [2021-12-06 20:34:31,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:34:31,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 20:34:31,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:34:31,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 20:34:31,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:34:31,081 INFO L87 Difference]: Start difference. First operand 951 states and 1153 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2021-12-06 20:34:31,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:34:31,353 INFO L93 Difference]: Finished difference Result 1418 states and 1767 transitions. [2021-12-06 20:34:31,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 20:34:31,354 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 108 [2021-12-06 20:34:31,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:34:31,360 INFO L225 Difference]: With dead ends: 1418 [2021-12-06 20:34:31,360 INFO L226 Difference]: Without dead ends: 1081 [2021-12-06 20:34:31,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-12-06 20:34:31,362 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 18 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:34:31,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 297 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:34:31,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2021-12-06 20:34:31,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 845. [2021-12-06 20:34:31,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 578 states have (on average 1.1591695501730104) internal successors, (670), 586 states have internal predecessors, (670), 159 states have call successors, (159), 108 states have call predecessors, (159), 107 states have return successors, (151), 150 states have call predecessors, (151), 151 states have call successors, (151) [2021-12-06 20:34:31,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 980 transitions. [2021-12-06 20:34:31,507 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 980 transitions. Word has length 108 [2021-12-06 20:34:31,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:34:31,507 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 980 transitions. [2021-12-06 20:34:31,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2021-12-06 20:34:31,507 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 980 transitions. [2021-12-06 20:34:31,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-06 20:34:31,508 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:34:31,508 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-12-06 20:34:31,541 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 20:34:31,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 20:34:31,709 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:34:31,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:34:31,709 INFO L85 PathProgramCache]: Analyzing trace with hash -312380604, now seen corresponding path program 2 times [2021-12-06 20:34:31,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:34:31,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826571284] [2021-12-06 20:34:31,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:34:31,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:34:31,715 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:34:31,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [585470652] [2021-12-06 20:34:31,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:34:31,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:34:31,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:34:31,716 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:34:31,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 20:34:31,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:34:31,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:34:31,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 20:34:31,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:34:31,877 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 177 proven. 36 refuted. 0 times theorem prover too weak. 431 trivial. 0 not checked. [2021-12-06 20:34:31,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:34:32,182 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 67 proven. 30 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2021-12-06 20:34:32,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:34:32,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826571284] [2021-12-06 20:34:32,183 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:34:32,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585470652] [2021-12-06 20:34:32,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585470652] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:34:32,183 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:34:32,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-12-06 20:34:32,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763796936] [2021-12-06 20:34:32,183 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:34:32,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 20:34:32,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:34:32,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 20:34:32,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-12-06 20:34:32,184 INFO L87 Difference]: Start difference. First operand 845 states and 980 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 9 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2021-12-06 20:34:32,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:34:32,416 INFO L93 Difference]: Finished difference Result 1157 states and 1369 transitions. [2021-12-06 20:34:32,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 20:34:32,417 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 9 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) Word has length 118 [2021-12-06 20:34:32,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:34:32,420 INFO L225 Difference]: With dead ends: 1157 [2021-12-06 20:34:32,420 INFO L226 Difference]: Without dead ends: 884 [2021-12-06 20:34:32,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 222 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-12-06 20:34:32,421 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 19 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:34:32,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 263 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:34:32,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-12-06 20:34:32,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 865. [2021-12-06 20:34:32,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 592 states have (on average 1.1554054054054055) internal successors, (684), 600 states have internal predecessors, (684), 165 states have call successors, (165), 108 states have call predecessors, (165), 107 states have return successors, (157), 156 states have call predecessors, (157), 157 states have call successors, (157) [2021-12-06 20:34:32,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 1006 transitions. [2021-12-06 20:34:32,543 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 1006 transitions. Word has length 118 [2021-12-06 20:34:32,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:34:32,543 INFO L470 AbstractCegarLoop]: Abstraction has 865 states and 1006 transitions. [2021-12-06 20:34:32,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 9 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2021-12-06 20:34:32,544 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 1006 transitions. [2021-12-06 20:34:32,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-06 20:34:32,545 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:34:32,545 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:34:32,577 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 20:34:32,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:34:32,745 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:34:32,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:34:32,746 INFO L85 PathProgramCache]: Analyzing trace with hash 146904463, now seen corresponding path program 2 times [2021-12-06 20:34:32,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:34:32,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604977962] [2021-12-06 20:34:32,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:34:32,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:34:32,752 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:34:32,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [973753670] [2021-12-06 20:34:32,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:34:32,752 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:34:32,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:34:32,753 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:34:32,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 20:34:32,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:34:32,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:34:32,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 20:34:32,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:34:32,879 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 102 proven. 51 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2021-12-06 20:34:32,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:34:33,080 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 69 proven. 18 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2021-12-06 20:34:33,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:34:33,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604977962] [2021-12-06 20:34:33,081 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:34:33,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973753670] [2021-12-06 20:34:33,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973753670] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:34:33,081 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:34:33,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-12-06 20:34:33,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048618805] [2021-12-06 20:34:33,081 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:34:33,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 20:34:33,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:34:33,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 20:34:33,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-06 20:34:33,082 INFO L87 Difference]: Start difference. First operand 865 states and 1006 transitions. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 8 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (34), 8 states have call predecessors, (34), 8 states have call successors, (34) [2021-12-06 20:34:33,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:34:33,226 INFO L93 Difference]: Finished difference Result 992 states and 1123 transitions. [2021-12-06 20:34:33,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 20:34:33,226 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 8 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (34), 8 states have call predecessors, (34), 8 states have call successors, (34) Word has length 120 [2021-12-06 20:34:33,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:34:33,229 INFO L225 Difference]: With dead ends: 992 [2021-12-06 20:34:33,229 INFO L226 Difference]: Without dead ends: 775 [2021-12-06 20:34:33,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 228 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-06 20:34:33,230 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 2 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:34:33,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 250 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:34:33,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2021-12-06 20:34:33,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 773. [2021-12-06 20:34:33,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 528 states have (on average 1.1553030303030303) internal successors, (610), 536 states have internal predecessors, (610), 143 states have call successors, (143), 102 states have call predecessors, (143), 101 states have return successors, (135), 134 states have call predecessors, (135), 135 states have call successors, (135) [2021-12-06 20:34:33,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 888 transitions. [2021-12-06 20:34:33,337 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 888 transitions. Word has length 120 [2021-12-06 20:34:33,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:34:33,338 INFO L470 AbstractCegarLoop]: Abstraction has 773 states and 888 transitions. [2021-12-06 20:34:33,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 8 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (34), 8 states have call predecessors, (34), 8 states have call successors, (34) [2021-12-06 20:34:33,338 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 888 transitions. [2021-12-06 20:34:33,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-06 20:34:33,339 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:34:33,339 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2021-12-06 20:34:33,360 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-06 20:34:33,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:34:33,540 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:34:33,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:34:33,540 INFO L85 PathProgramCache]: Analyzing trace with hash -405037921, now seen corresponding path program 4 times [2021-12-06 20:34:33,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:34:33,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935523188] [2021-12-06 20:34:33,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:34:33,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:34:33,547 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:34:33,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2040916186] [2021-12-06 20:34:33,547 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:34:33,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:34:33,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:34:33,548 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:34:33,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f392c808-c577-4ca1-be93-eca7d06e86af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 20:34:33,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:34:33,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:34:33,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 77 conjunts are in the unsatisfiable core [2021-12-06 20:34:33,726 INFO L286 TraceCheckSpWp]: Computing forward predicates...