./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a --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 9f971bd1a6fba471cdece6d295ca31488341eb806ea8364f7549d05755c7a031 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-21 16:44:53,301 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:44:53,304 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:44:53,344 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:44:53,345 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:44:53,346 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:44:53,347 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:44:53,350 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:44:53,355 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:44:53,361 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:44:53,363 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:44:53,366 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:44:53,367 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:44:53,370 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:44:53,373 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:44:53,375 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:44:53,377 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:44:53,378 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:44:53,380 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:44:53,387 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:44:53,389 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:44:53,391 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:44:53,393 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:44:53,394 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:44:53,405 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:44:53,405 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:44:53,406 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:44:53,408 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:44:53,408 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:44:53,410 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:44:53,411 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:44:53,412 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:44:53,414 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:44:53,415 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:44:53,416 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:44:53,416 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:44:53,417 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:44:53,417 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:44:53,418 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:44:53,419 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:44:53,420 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:44:53,421 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 16:44:53,465 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:44:53,466 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:44:53,466 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:44:53,467 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:44:53,468 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:44:53,469 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:44:53,470 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:44:53,470 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:44:53,471 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:44:53,471 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:44:53,471 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:44:53,472 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:44:53,472 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:44:53,472 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:44:53,472 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 16:44:53,472 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:44:53,473 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 16:44:53,473 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:44:53,473 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 16:44:53,473 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:44:53,474 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 16:44:53,474 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:44:53,474 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:44:53,474 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:44:53,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:44:53,475 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:44:53,475 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:44:53,475 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 16:44:53,476 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 16:44:53,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 16:44:53,476 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 16:44:53,476 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 16:44:53,476 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 16:44:53,477 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_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9f971bd1a6fba471cdece6d295ca31488341eb806ea8364f7549d05755c7a031 [2022-11-21 16:44:53,723 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:44:53,758 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:44:53,764 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:44:53,765 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:44:53,766 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:44:53,768 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound10.c [2022-11-21 16:44:57,124 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:44:57,396 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:44:57,396 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound10.c [2022-11-21 16:44:57,403 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/data/8a004a724/88bfadf2f2b6485eadfb6c5ef2f51ec3/FLAGfdda2f128 [2022-11-21 16:44:57,419 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/data/8a004a724/88bfadf2f2b6485eadfb6c5ef2f51ec3 [2022-11-21 16:44:57,422 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:44:57,424 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:44:57,425 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:44:57,426 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:44:57,430 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:44:57,431 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:44:57" (1/1) ... [2022-11-21 16:44:57,432 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@525a5816 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:44:57, skipping insertion in model container [2022-11-21 16:44:57,432 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:44:57" (1/1) ... [2022-11-21 16:44:57,440 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:44:57,455 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:44:57,592 WARN L237 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_2abbbcc7-4390-421c-aa69-ba9a727854e4/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound10.c[526,539] [2022-11-21 16:44:57,610 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:44:57,622 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 16:44:57,636 WARN L237 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_2abbbcc7-4390-421c-aa69-ba9a727854e4/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound10.c[526,539] [2022-11-21 16:44:57,643 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:44:57,657 INFO L208 MainTranslator]: Completed translation [2022-11-21 16:44:57,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:44:57 WrapperNode [2022-11-21 16:44:57,657 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:44:57,658 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 16:44:57,658 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 16:44:57,659 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 16:44:57,665 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:44:57" (1/1) ... [2022-11-21 16:44:57,673 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:44:57" (1/1) ... [2022-11-21 16:44:57,693 INFO L138 Inliner]: procedures = 14, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2022-11-21 16:44:57,694 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 16:44:57,694 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 16:44:57,695 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 16:44:57,695 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 16:44:57,706 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:44:57" (1/1) ... [2022-11-21 16:44:57,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:44:57" (1/1) ... [2022-11-21 16:44:57,708 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:44:57" (1/1) ... [2022-11-21 16:44:57,708 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:44:57" (1/1) ... [2022-11-21 16:44:57,712 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:44:57" (1/1) ... [2022-11-21 16:44:57,717 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:44:57" (1/1) ... [2022-11-21 16:44:57,718 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:44:57" (1/1) ... [2022-11-21 16:44:57,719 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:44:57" (1/1) ... [2022-11-21 16:44:57,721 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 16:44:57,722 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 16:44:57,723 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 16:44:57,723 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 16:44:57,724 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:44:57" (1/1) ... [2022-11-21 16:44:57,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:44:57,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:44:57,761 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 16:44:57,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 16:44:57,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 16:44:57,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 16:44:57,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 16:44:57,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 16:44:57,814 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-21 16:44:57,814 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-21 16:44:57,890 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 16:44:57,894 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 16:44:58,066 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 16:44:58,073 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 16:44:58,073 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-21 16:44:58,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:44:58 BoogieIcfgContainer [2022-11-21 16:44:58,075 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 16:44:58,078 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 16:44:58,079 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 16:44:58,082 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 16:44:58,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 04:44:57" (1/3) ... [2022-11-21 16:44:58,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@379d4043 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:44:58, skipping insertion in model container [2022-11-21 16:44:58,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:44:57" (2/3) ... [2022-11-21 16:44:58,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@379d4043 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:44:58, skipping insertion in model container [2022-11-21 16:44:58,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:44:58" (3/3) ... [2022-11-21 16:44:58,086 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound10.c [2022-11-21 16:44:58,107 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 16:44:58,107 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 16:44:58,163 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:44:58,171 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4dca9f5b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:44:58,172 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-21 16:44:58,176 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) [2022-11-21 16:44:58,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-21 16:44:58,184 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:44:58,185 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:44:58,186 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:44:58,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:44:58,191 INFO L85 PathProgramCache]: Analyzing trace with hash 643118537, now seen corresponding path program 1 times [2022-11-21 16:44:58,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:44:58,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424349243] [2022-11-21 16:44:58,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:44:58,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:44:58,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:44:58,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:44:58,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424349243] [2022-11-21 16:44:58,318 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-21 16:44:58,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162247224] [2022-11-21 16:44:58,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:44:58,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:44:58,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:44:58,323 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:44:58,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 16:44:58,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:44:58,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-21 16:44:58,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:44:58,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:44:58,454 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:44:58,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162247224] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:44:58,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:44:58,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:44:58,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075442096] [2022-11-21 16:44:58,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:44:58,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 16:44:58,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:44:58,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 16:44:58,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 16:44:58,523 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) [2022-11-21 16:44:58,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:44:58,566 INFO L93 Difference]: Finished difference Result 50 states and 83 transitions. [2022-11-21 16:44:58,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 16:44:58,569 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 [2022-11-21 16:44:58,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:44:58,579 INFO L225 Difference]: With dead ends: 50 [2022-11-21 16:44:58,579 INFO L226 Difference]: Without dead ends: 22 [2022-11-21 16:44:58,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 16:44:58,587 INFO L413 NwaCegarLoop]: 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 [2022-11-21 16:44:58,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:44:58,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-21 16:44:58,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-21 16:44:58,667 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) [2022-11-21 16:44:58,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 32 transitions. [2022-11-21 16:44:58,670 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 32 transitions. Word has length 8 [2022-11-21 16:44:58,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:44:58,670 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 32 transitions. [2022-11-21 16:44:58,670 INFO L496 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) [2022-11-21 16:44:58,671 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 32 transitions. [2022-11-21 16:44:58,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-21 16:44:58,671 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:44:58,672 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:44:58,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 16:44:58,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-21 16:44:58,874 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:44:58,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:44:58,878 INFO L85 PathProgramCache]: Analyzing trace with hash 181060127, now seen corresponding path program 1 times [2022-11-21 16:44:58,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:44:58,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574210514] [2022-11-21 16:44:58,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:44:58,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:44:58,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:44:59,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:44:59,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:44:59,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574210514] [2022-11-21 16:44:59,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574210514] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:44:59,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:44:59,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 16:44:59,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164286476] [2022-11-21 16:44:59,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:44:59,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:44:59,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:44:59,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:44:59,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:44:59,223 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) [2022-11-21 16:44:59,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:44:59,283 INFO L93 Difference]: Finished difference Result 36 states and 51 transitions. [2022-11-21 16:44:59,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:44:59,284 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 [2022-11-21 16:44:59,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:44:59,286 INFO L225 Difference]: With dead ends: 36 [2022-11-21 16:44:59,286 INFO L226 Difference]: Without dead ends: 34 [2022-11-21 16:44:59,286 INFO L412 NwaCegarLoop]: 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 [2022-11-21 16:44:59,288 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 15 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:44:59,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 99 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:44:59,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-21 16:44:59,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2022-11-21 16:44:59,305 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) [2022-11-21 16:44:59,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2022-11-21 16:44:59,309 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 8 [2022-11-21 16:44:59,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:44:59,310 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2022-11-21 16:44:59,312 INFO L496 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) [2022-11-21 16:44:59,312 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2022-11-21 16:44:59,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-21 16:44:59,313 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:44:59,314 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:44:59,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 16:44:59,315 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:44:59,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:44:59,317 INFO L85 PathProgramCache]: Analyzing trace with hash -712280900, now seen corresponding path program 1 times [2022-11-21 16:44:59,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:44:59,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30237161] [2022-11-21 16:44:59,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:44:59,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:44:59,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:44:59,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:44:59,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30237161] [2022-11-21 16:44:59,364 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-21 16:44:59,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910265624] [2022-11-21 16:44:59,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:44:59,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:44:59,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:44:59,369 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:44:59,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 16:44:59,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:44:59,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-21 16:44:59,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:44:59,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:44:59,497 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:44:59,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910265624] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:44:59,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:44:59,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:44:59,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209620825] [2022-11-21 16:44:59,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:44:59,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:44:59,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:44:59,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:44:59,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:44:59,501 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) [2022-11-21 16:44:59,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:44:59,522 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2022-11-21 16:44:59,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:44:59,523 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 [2022-11-21 16:44:59,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:44:59,524 INFO L225 Difference]: With dead ends: 42 [2022-11-21 16:44:59,525 INFO L226 Difference]: Without dead ends: 28 [2022-11-21 16:44:59,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:44:59,526 INFO L413 NwaCegarLoop]: 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 [2022-11-21 16:44:59,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 85 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:44:59,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-21 16:44:59,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-21 16:44:59,534 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) [2022-11-21 16:44:59,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2022-11-21 16:44:59,536 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 10 [2022-11-21 16:44:59,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:44:59,536 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2022-11-21 16:44:59,537 INFO L496 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) [2022-11-21 16:44:59,537 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2022-11-21 16:44:59,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-21 16:44:59,537 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:44:59,538 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:44:59,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 16:44:59,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:44:59,744 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:44:59,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:44:59,745 INFO L85 PathProgramCache]: Analyzing trace with hash 2036073049, now seen corresponding path program 1 times [2022-11-21 16:44:59,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:44:59,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505034847] [2022-11-21 16:44:59,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:44:59,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:44:59,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:44:59,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 16:44:59,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:44:59,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:44:59,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:44:59,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505034847] [2022-11-21 16:44:59,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505034847] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:44:59,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:44:59,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 16:44:59,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475225337] [2022-11-21 16:44:59,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:44:59,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:44:59,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:44:59,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:44:59,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:44:59,878 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) [2022-11-21 16:44:59,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:44:59,944 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2022-11-21 16:44:59,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:44:59,944 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 [2022-11-21 16:44:59,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:44:59,946 INFO L225 Difference]: With dead ends: 42 [2022-11-21 16:44:59,946 INFO L226 Difference]: Without dead ends: 40 [2022-11-21 16:44:59,946 INFO L412 NwaCegarLoop]: 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 [2022-11-21 16:44:59,948 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 13 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:44:59,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 95 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:44:59,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-21 16:44:59,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2022-11-21 16:44:59,958 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) [2022-11-21 16:44:59,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2022-11-21 16:44:59,960 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 13 [2022-11-21 16:44:59,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:44:59,961 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2022-11-21 16:44:59,961 INFO L496 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) [2022-11-21 16:44:59,961 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2022-11-21 16:44:59,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-21 16:44:59,962 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:44:59,962 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:44:59,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-21 16:44:59,963 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:44:59,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:44:59,964 INFO L85 PathProgramCache]: Analyzing trace with hash 380169759, now seen corresponding path program 1 times [2022-11-21 16:44:59,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:44:59,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720663827] [2022-11-21 16:44:59,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:44:59,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:44:59,978 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:44:59,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1188690047] [2022-11-21 16:44:59,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:44:59,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:44:59,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:44:59,981 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:45:00,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 16:45:00,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:45:00,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-21 16:45:00,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:45:00,230 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:45:00,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:45:00,440 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:45:00,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:45:00,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720663827] [2022-11-21 16:45:00,447 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:45:00,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188690047] [2022-11-21 16:45:00,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188690047] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:45:00,448 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:45:00,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2022-11-21 16:45:00,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133259451] [2022-11-21 16:45:00,448 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:45:00,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 16:45:00,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:45:00,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 16:45:00,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-21 16:45:00,453 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-21 16:45:00,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:45:00,921 INFO L93 Difference]: Finished difference Result 71 states and 96 transitions. [2022-11-21 16:45:00,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 16:45:00,921 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 18 [2022-11-21 16:45:00,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:45:00,924 INFO L225 Difference]: With dead ends: 71 [2022-11-21 16:45:00,924 INFO L226 Difference]: Without dead ends: 56 [2022-11-21 16:45:00,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-11-21 16:45:00,926 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 48 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-21 16:45:00,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 79 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-21 16:45:00,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-21 16:45:00,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2022-11-21 16:45:00,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 36 states have internal predecessors, (42), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-21 16:45:00,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2022-11-21 16:45:00,961 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 18 [2022-11-21 16:45:00,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:45:00,962 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2022-11-21 16:45:00,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-21 16:45:00,962 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2022-11-21 16:45:00,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-21 16:45:00,963 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:45:00,964 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:45:00,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 16:45:01,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:45:01,171 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:45:01,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:45:01,171 INFO L85 PathProgramCache]: Analyzing trace with hash -461064832, now seen corresponding path program 1 times [2022-11-21 16:45:01,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:45:01,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976805198] [2022-11-21 16:45:01,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:45:01,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:45:01,192 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:45:01,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1713349864] [2022-11-21 16:45:01,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:45:01,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:45:01,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:45:01,197 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:45:01,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 16:45:01,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:45:01,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-21 16:45:01,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:45:01,434 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 16:45:01,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:45:01,645 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 16:45:01,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:45:01,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976805198] [2022-11-21 16:45:01,646 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:45:01,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713349864] [2022-11-21 16:45:01,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713349864] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:45:01,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:45:01,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-11-21 16:45:01,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989265717] [2022-11-21 16:45:01,647 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:45:01,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-21 16:45:01,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:45:01,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-21 16:45:01,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-21 16:45:01,648 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-21 16:45:01,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:45:01,895 INFO L93 Difference]: Finished difference Result 73 states and 97 transitions. [2022-11-21 16:45:01,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 16:45:01,896 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 26 [2022-11-21 16:45:01,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:45:01,902 INFO L225 Difference]: With dead ends: 73 [2022-11-21 16:45:01,902 INFO L226 Difference]: Without dead ends: 65 [2022-11-21 16:45:01,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-11-21 16:45:01,908 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 40 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:45:01,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 71 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:45:01,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-21 16:45:01,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2022-11-21 16:45:01,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 43 states have internal predecessors, (50), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-21 16:45:01,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 81 transitions. [2022-11-21 16:45:01,949 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 81 transitions. Word has length 26 [2022-11-21 16:45:01,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:45:01,950 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 81 transitions. [2022-11-21 16:45:01,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-21 16:45:01,951 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 81 transitions. [2022-11-21 16:45:01,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-21 16:45:01,953 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:45:01,953 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:45:01,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-21 16:45:02,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-21 16:45:02,166 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:45:02,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:45:02,167 INFO L85 PathProgramCache]: Analyzing trace with hash 847666457, now seen corresponding path program 1 times [2022-11-21 16:45:02,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:45:02,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424009283] [2022-11-21 16:45:02,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:45:02,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:45:02,184 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:45:02,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [806074391] [2022-11-21 16:45:02,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:45:02,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:45:02,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:45:02,187 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:45:02,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 16:45:02,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:45:02,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 16:45:02,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:45:02,312 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-21 16:45:02,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:45:02,385 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-21 16:45:02,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:45:02,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424009283] [2022-11-21 16:45:02,386 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:45:02,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806074391] [2022-11-21 16:45:02,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806074391] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:45:02,387 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:45:02,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-11-21 16:45:02,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339474351] [2022-11-21 16:45:02,387 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:45:02,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 16:45:02,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:45:02,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 16:45:02,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:45:02,389 INFO L87 Difference]: Start difference. First operand 62 states and 81 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) [2022-11-21 16:45:02,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:45:02,543 INFO L93 Difference]: Finished difference Result 165 states and 205 transitions. [2022-11-21 16:45:02,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 16:45:02,544 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 [2022-11-21 16:45:02,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:45:02,545 INFO L225 Difference]: With dead ends: 165 [2022-11-21 16:45:02,545 INFO L226 Difference]: Without dead ends: 127 [2022-11-21 16:45:02,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-21 16:45:02,547 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 41 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:45:02,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 137 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:45:02,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-21 16:45:02,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 121. [2022-11-21 16:45:02,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 79 states have (on average 1.1898734177215189) internal successors, (94), 83 states have internal predecessors, (94), 26 states have call successors, (26), 16 states have call predecessors, (26), 15 states have return successors, (24), 21 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-21 16:45:02,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 144 transitions. [2022-11-21 16:45:02,572 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 144 transitions. Word has length 33 [2022-11-21 16:45:02,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:45:02,572 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 144 transitions. [2022-11-21 16:45:02,573 INFO L496 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) [2022-11-21 16:45:02,573 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 144 transitions. [2022-11-21 16:45:02,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-21 16:45:02,574 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:45:02,574 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:45:02,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-21 16:45:02,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-21 16:45:02,782 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:45:02,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:45:02,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1605675221, now seen corresponding path program 1 times [2022-11-21 16:45:02,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:45:02,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813508640] [2022-11-21 16:45:02,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:45:02,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:45:02,807 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:45:02,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1903594434] [2022-11-21 16:45:02,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:45:02,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:45:02,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:45:02,812 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:45:02,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-21 16:45:02,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:45:02,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-21 16:45:02,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:45:03,003 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-21 16:45:03,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:45:03,118 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-21 16:45:03,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:45:03,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813508640] [2022-11-21 16:45:03,118 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:45:03,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903594434] [2022-11-21 16:45:03,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903594434] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:45:03,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:45:03,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2022-11-21 16:45:03,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866741702] [2022-11-21 16:45:03,120 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:45:03,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 16:45:03,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:45:03,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 16:45:03,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-21 16:45:03,123 INFO L87 Difference]: Start difference. First operand 121 states and 144 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) [2022-11-21 16:45:03,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:45:03,395 INFO L93 Difference]: Finished difference Result 249 states and 307 transitions. [2022-11-21 16:45:03,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-21 16:45:03,395 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 [2022-11-21 16:45:03,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:45:03,398 INFO L225 Difference]: With dead ends: 249 [2022-11-21 16:45:03,398 INFO L226 Difference]: Without dead ends: 228 [2022-11-21 16:45:03,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-11-21 16:45:03,399 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 103 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:45:03,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 261 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:45:03,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-11-21 16:45:03,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 221. [2022-11-21 16:45:03,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 144 states have (on average 1.1944444444444444) internal successors, (172), 155 states have internal predecessors, (172), 51 states have call successors, (51), 26 states have call predecessors, (51), 25 states have return successors, (47), 39 states have call predecessors, (47), 47 states have call successors, (47) [2022-11-21 16:45:03,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 270 transitions. [2022-11-21 16:45:03,436 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 270 transitions. Word has length 49 [2022-11-21 16:45:03,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:45:03,437 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 270 transitions. [2022-11-21 16:45:03,437 INFO L496 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) [2022-11-21 16:45:03,437 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 270 transitions. [2022-11-21 16:45:03,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-21 16:45:03,439 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:45:03,439 INFO L195 NwaCegarLoop]: 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] [2022-11-21 16:45:03,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-21 16:45:03,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:45:03,646 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:45:03,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:45:03,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1800695307, now seen corresponding path program 1 times [2022-11-21 16:45:03,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:45:03,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292601021] [2022-11-21 16:45:03,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:45:03,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:45:03,654 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:45:03,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1610797490] [2022-11-21 16:45:03,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:45:03,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:45:03,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:45:03,660 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:45:03,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-21 16:45:03,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:45:03,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-21 16:45:03,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:45:04,137 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 18 proven. 28 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-21 16:45:04,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:45:05,864 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 18 proven. 28 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-21 16:45:05,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:45:05,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292601021] [2022-11-21 16:45:05,865 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:45:05,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610797490] [2022-11-21 16:45:05,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610797490] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:45:05,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:45:05,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-11-21 16:45:05,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19514770] [2022-11-21 16:45:05,866 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:45:05,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-21 16:45:05,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:45:05,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-21 16:45:05,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-11-21 16:45:05,868 INFO L87 Difference]: Start difference. First operand 221 states and 270 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-21 16:45:13,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-21 16:45:14,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:45:14,158 INFO L93 Difference]: Finished difference Result 372 states and 479 transitions. [2022-11-21 16:45:14,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-21 16:45:14,159 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 58 [2022-11-21 16:45:14,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:45:14,162 INFO L225 Difference]: With dead ends: 372 [2022-11-21 16:45:14,162 INFO L226 Difference]: Without dead ends: 299 [2022-11-21 16:45:14,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-11-21 16:45:14,164 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 74 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 124 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-21 16:45:14,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 147 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 408 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2022-11-21 16:45:14,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-11-21 16:45:14,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 272. [2022-11-21 16:45:14,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 186 states have (on average 1.2258064516129032) internal successors, (228), 194 states have internal predecessors, (228), 56 states have call successors, (56), 29 states have call predecessors, (56), 29 states have return successors, (54), 48 states have call predecessors, (54), 54 states have call successors, (54) [2022-11-21 16:45:14,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 338 transitions. [2022-11-21 16:45:14,259 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 338 transitions. Word has length 58 [2022-11-21 16:45:14,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:45:14,260 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 338 transitions. [2022-11-21 16:45:14,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-21 16:45:14,260 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 338 transitions. [2022-11-21 16:45:14,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-21 16:45:14,262 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:45:14,262 INFO L195 NwaCegarLoop]: 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] [2022-11-21 16:45:14,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-21 16:45:14,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:45:14,469 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:45:14,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:45:14,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1688778742, now seen corresponding path program 1 times [2022-11-21 16:45:14,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:45:14,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820811652] [2022-11-21 16:45:14,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:45:14,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:45:14,479 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:45:14,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1236463758] [2022-11-21 16:45:14,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:45:14,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:45:14,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:45:14,481 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:45:14,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-21 16:45:14,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:45:14,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-21 16:45:14,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:45:14,932 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-11-21 16:45:14,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:45:15,728 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-11-21 16:45:15,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:45:15,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820811652] [2022-11-21 16:45:15,728 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:45:15,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236463758] [2022-11-21 16:45:15,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236463758] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:45:15,729 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:45:15,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2022-11-21 16:45:15,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900648252] [2022-11-21 16:45:15,731 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:45:15,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-21 16:45:15,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:45:15,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-21 16:45:15,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-11-21 16:45:15,733 INFO L87 Difference]: Start difference. First operand 272 states and 338 transitions. Second operand has 16 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2022-11-21 16:45:17,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:45:17,158 INFO L93 Difference]: Finished difference Result 341 states and 423 transitions. [2022-11-21 16:45:17,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 16:45:17,159 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 69 [2022-11-21 16:45:17,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:45:17,161 INFO L225 Difference]: With dead ends: 341 [2022-11-21 16:45:17,161 INFO L226 Difference]: Without dead ends: 260 [2022-11-21 16:45:17,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-11-21 16:45:17,162 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 67 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:45:17,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 111 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-21 16:45:17,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-11-21 16:45:17,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 236. [2022-11-21 16:45:17,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 161 states have (on average 1.1801242236024845) internal successors, (190), 165 states have internal predecessors, (190), 46 states have call successors, (46), 29 states have call predecessors, (46), 28 states have return successors, (44), 41 states have call predecessors, (44), 44 states have call successors, (44) [2022-11-21 16:45:17,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 280 transitions. [2022-11-21 16:45:17,234 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 280 transitions. Word has length 69 [2022-11-21 16:45:17,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:45:17,235 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 280 transitions. [2022-11-21 16:45:17,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2022-11-21 16:45:17,235 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 280 transitions. [2022-11-21 16:45:17,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-21 16:45:17,236 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:45:17,237 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:45:17,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-21 16:45:17,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-21 16:45:17,443 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:45:17,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:45:17,444 INFO L85 PathProgramCache]: Analyzing trace with hash -428937714, now seen corresponding path program 1 times [2022-11-21 16:45:17,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:45:17,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515978862] [2022-11-21 16:45:17,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:45:17,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:45:17,463 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:45:17,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1089246900] [2022-11-21 16:45:17,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:45:17,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:45:17,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:45:17,466 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:45:17,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-21 16:45:17,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:45:17,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-21 16:45:17,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:45:17,804 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 24 proven. 39 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-21 16:45:17,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:45:18,388 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 24 proven. 39 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-21 16:45:18,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:45:18,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515978862] [2022-11-21 16:45:18,389 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:45:18,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089246900] [2022-11-21 16:45:18,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089246900] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:45:18,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:45:18,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2022-11-21 16:45:18,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658778976] [2022-11-21 16:45:18,389 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:45:18,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-21 16:45:18,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:45:18,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-21 16:45:18,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-11-21 16:45:18,391 INFO L87 Difference]: Start difference. First operand 236 states and 280 transitions. Second operand has 16 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 8 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2022-11-21 16:45:19,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:45:19,114 INFO L93 Difference]: Finished difference Result 260 states and 307 transitions. [2022-11-21 16:45:19,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-21 16:45:19,115 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 8 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 74 [2022-11-21 16:45:19,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:45:19,117 INFO L225 Difference]: With dead ends: 260 [2022-11-21 16:45:19,117 INFO L226 Difference]: Without dead ends: 215 [2022-11-21 16:45:19,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-11-21 16:45:19,118 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 52 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-21 16:45:19,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 165 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-21 16:45:19,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-11-21 16:45:19,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 210. [2022-11-21 16:45:19,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 143 states have (on average 1.1468531468531469) internal successors, (164), 148 states have internal predecessors, (164), 41 states have call successors, (41), 25 states have call predecessors, (41), 25 states have return successors, (39), 36 states have call predecessors, (39), 39 states have call successors, (39) [2022-11-21 16:45:19,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 244 transitions. [2022-11-21 16:45:19,226 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 244 transitions. Word has length 74 [2022-11-21 16:45:19,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:45:19,226 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 244 transitions. [2022-11-21 16:45:19,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 8 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2022-11-21 16:45:19,226 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 244 transitions. [2022-11-21 16:45:19,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-21 16:45:19,228 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:45:19,228 INFO L195 NwaCegarLoop]: 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] [2022-11-21 16:45:19,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-21 16:45:19,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:45:19,431 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:45:19,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:45:19,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1611798954, now seen corresponding path program 2 times [2022-11-21 16:45:19,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:45:19,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975076816] [2022-11-21 16:45:19,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:45:19,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:45:19,445 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:45:19,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1687336491] [2022-11-21 16:45:19,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:45:19,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:45:19,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:45:19,447 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:45:19,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-21 16:45:19,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:45:19,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:45:19,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-21 16:45:19,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:45:20,198 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 28 proven. 64 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-11-21 16:45:20,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:45:58,527 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 28 proven. 64 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-11-21 16:45:58,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:45:58,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975076816] [2022-11-21 16:45:58,528 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:45:58,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687336491] [2022-11-21 16:45:58,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687336491] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:45:58,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:45:58,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2022-11-21 16:45:58,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397998241] [2022-11-21 16:45:58,529 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:45:58,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-21 16:45:58,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:45:58,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-21 16:45:58,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-11-21 16:45:58,531 INFO L87 Difference]: Start difference. First operand 210 states and 244 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2022-11-21 16:46:36,526 WARN L233 SmtUtils]: Spent 36.93s on a formula simplification. DAG size of input: 172 DAG size of output: 104 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:46:39,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-21 16:46:41,860 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-21 16:46:51,119 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-21 16:46:51,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:46:51,137 INFO L93 Difference]: Finished difference Result 306 states and 390 transitions. [2022-11-21 16:46:51,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-21 16:46:51,138 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) Word has length 90 [2022-11-21 16:46:51,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:46:51,140 INFO L225 Difference]: With dead ends: 306 [2022-11-21 16:46:51,140 INFO L226 Difference]: Without dead ends: 262 [2022-11-21 16:46:51,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 45.7s TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2022-11-21 16:46:51,141 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 159 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 215 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 1278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:46:51,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 328 Invalid, 1278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 1062 Invalid, 1 Unknown, 0 Unchecked, 12.0s Time] [2022-11-21 16:46:51,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-11-21 16:46:51,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 247. [2022-11-21 16:46:51,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 166 states have (on average 1.1987951807228916) internal successors, (199), 175 states have internal predecessors, (199), 54 states have call successors, (54), 26 states have call predecessors, (54), 26 states have return successors, (52), 45 states have call predecessors, (52), 52 states have call successors, (52) [2022-11-21 16:46:51,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 305 transitions. [2022-11-21 16:46:51,282 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 305 transitions. Word has length 90 [2022-11-21 16:46:51,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:46:51,282 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 305 transitions. [2022-11-21 16:46:51,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2022-11-21 16:46:51,283 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 305 transitions. [2022-11-21 16:46:51,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-21 16:46:51,284 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:46:51,284 INFO L195 NwaCegarLoop]: 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] [2022-11-21 16:46:51,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-21 16:46:51,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-21 16:46:51,490 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:46:51,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:46:51,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1991126182, now seen corresponding path program 1 times [2022-11-21 16:46:51,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:46:51,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207806696] [2022-11-21 16:46:51,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:46:51,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:46:51,507 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:46:51,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1377758819] [2022-11-21 16:46:51,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:46:51,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:46:51,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:46:51,509 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:46:51,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-21 16:46:51,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:46:51,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-21 16:46:51,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:46:51,754 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 120 proven. 260 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-21 16:46:51,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:46:51,930 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2022-11-21 16:46:51,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:46:51,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207806696] [2022-11-21 16:46:51,930 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:46:51,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377758819] [2022-11-21 16:46:51,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377758819] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:46:51,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:46:51,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-11-21 16:46:51,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056008787] [2022-11-21 16:46:51,931 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:46:51,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 16:46:51,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:46:51,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 16:46:51,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-21 16:46:51,932 INFO L87 Difference]: Start difference. First operand 247 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) [2022-11-21 16:46:52,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:46:52,628 INFO L93 Difference]: Finished difference Result 707 states and 937 transitions. [2022-11-21 16:46:52,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-21 16:46:52,628 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 [2022-11-21 16:46:52,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:46:52,632 INFO L225 Difference]: With dead ends: 707 [2022-11-21 16:46:52,632 INFO L226 Difference]: Without dead ends: 629 [2022-11-21 16:46:52,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-11-21 16:46:52,634 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 208 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:46:52,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 293 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:46:52,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2022-11-21 16:46:52,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 549. [2022-11-21 16:46:52,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 362 states have (on average 1.270718232044199) internal successors, (460), 391 states have internal predecessors, (460), 134 states have call successors, (134), 53 states have call predecessors, (134), 52 states have return successors, (127), 104 states have call predecessors, (127), 127 states have call successors, (127) [2022-11-21 16:46:52,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 721 transitions. [2022-11-21 16:46:52,895 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 721 transitions. Word has length 96 [2022-11-21 16:46:52,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:46:52,895 INFO L495 AbstractCegarLoop]: Abstraction has 549 states and 721 transitions. [2022-11-21 16:46:52,895 INFO L496 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) [2022-11-21 16:46:52,896 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 721 transitions. [2022-11-21 16:46:52,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-21 16:46:52,897 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:46:52,897 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:46:52,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-21 16:46:53,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:46:53,103 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:46:53,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:46:53,104 INFO L85 PathProgramCache]: Analyzing trace with hash -218084043, now seen corresponding path program 2 times [2022-11-21 16:46:53,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:46:53,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833074560] [2022-11-21 16:46:53,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:46:53,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:46:53,114 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:46:53,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1033207716] [2022-11-21 16:46:53,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:46:53,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:46:53,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:46:53,116 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:46:53,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-21 16:46:53,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:46:53,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:46:53,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-21 16:46:53,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:46:53,676 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 32 proven. 74 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-11-21 16:46:53,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:47:06,159 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 32 proven. 74 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-11-21 16:47:06,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:47:06,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833074560] [2022-11-21 16:47:06,160 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:47:06,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033207716] [2022-11-21 16:47:06,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033207716] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:47:06,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:47:06,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2022-11-21 16:47:06,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008304077] [2022-11-21 16:47:06,161 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:47:06,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-21 16:47:06,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:47:06,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-21 16:47:06,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-11-21 16:47:06,163 INFO L87 Difference]: Start difference. First operand 549 states and 721 transitions. Second operand has 21 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 20 states have internal predecessors, (56), 12 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) [2022-11-21 16:47:14,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-21 16:47:20,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-21 16:47:22,713 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-21 16:47:28,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:47:28,497 INFO L93 Difference]: Finished difference Result 672 states and 874 transitions. [2022-11-21 16:47:28,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-21 16:47:28,497 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 20 states have internal predecessors, (56), 12 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) Word has length 101 [2022-11-21 16:47:28,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:47:28,501 INFO L225 Difference]: With dead ends: 672 [2022-11-21 16:47:28,501 INFO L226 Difference]: Without dead ends: 511 [2022-11-21 16:47:28,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 178 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=227, Invalid=765, Unknown=0, NotChecked=0, Total=992 [2022-11-21 16:47:28,503 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 119 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 175 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2022-11-21 16:47:28,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 237 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 828 Invalid, 3 Unknown, 0 Unchecked, 9.9s Time] [2022-11-21 16:47:28,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-11-21 16:47:28,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 488. [2022-11-21 16:47:28,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 322 states have (on average 1.2111801242236024) internal successors, (390), 347 states have internal predecessors, (390), 112 states have call successors, (112), 53 states have call predecessors, (112), 53 states have return successors, (107), 87 states have call predecessors, (107), 107 states have call successors, (107) [2022-11-21 16:47:28,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 609 transitions. [2022-11-21 16:47:28,754 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 609 transitions. Word has length 101 [2022-11-21 16:47:28,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:47:28,755 INFO L495 AbstractCegarLoop]: Abstraction has 488 states and 609 transitions. [2022-11-21 16:47:28,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 20 states have internal predecessors, (56), 12 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) [2022-11-21 16:47:28,755 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 609 transitions. [2022-11-21 16:47:28,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-21 16:47:28,757 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:47:28,757 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:47:28,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-21 16:47:28,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:47:28,963 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:47:28,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:47:28,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1246855822, now seen corresponding path program 1 times [2022-11-21 16:47:28,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:47:28,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664314126] [2022-11-21 16:47:28,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:47:28,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:47:28,972 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:47:28,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [357309413] [2022-11-21 16:47:28,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:47:28,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:47:28,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:47:28,974 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:47:28,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-21 16:47:29,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:47:29,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-21 16:47:29,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:47:29,263 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 414 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-21 16:47:29,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:47:29,442 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 42 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-11-21 16:47:29,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:47:29,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664314126] [2022-11-21 16:47:29,443 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:47:29,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357309413] [2022-11-21 16:47:29,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357309413] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:47:29,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:47:29,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2022-11-21 16:47:29,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55410915] [2022-11-21 16:47:29,444 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:47:29,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 16:47:29,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:47:29,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 16:47:29,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-21 16:47:29,445 INFO L87 Difference]: Start difference. First operand 488 states and 609 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 10 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2022-11-21 16:47:30,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:47:30,111 INFO L93 Difference]: Finished difference Result 572 states and 720 transitions. [2022-11-21 16:47:30,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-21 16:47:30,111 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 10 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) Word has length 104 [2022-11-21 16:47:30,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:47:30,115 INFO L225 Difference]: With dead ends: 572 [2022-11-21 16:47:30,115 INFO L226 Difference]: Without dead ends: 537 [2022-11-21 16:47:30,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 190 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2022-11-21 16:47:30,118 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 185 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:47:30,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 280 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:47:30,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2022-11-21 16:47:30,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 533. [2022-11-21 16:47:30,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 361 states have (on average 1.1385041551246537) internal successors, (411), 381 states have internal predecessors, (411), 118 states have call successors, (118), 53 states have call predecessors, (118), 53 states have return successors, (114), 98 states have call predecessors, (114), 114 states have call successors, (114) [2022-11-21 16:47:30,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 643 transitions. [2022-11-21 16:47:30,444 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 643 transitions. Word has length 104 [2022-11-21 16:47:30,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:47:30,444 INFO L495 AbstractCegarLoop]: Abstraction has 533 states and 643 transitions. [2022-11-21 16:47:30,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 10 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2022-11-21 16:47:30,445 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 643 transitions. [2022-11-21 16:47:30,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-21 16:47:30,450 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:47:30,451 INFO L195 NwaCegarLoop]: 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] [2022-11-21 16:47:30,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-21 16:47:30,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-21 16:47:30,661 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:47:30,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:47:30,662 INFO L85 PathProgramCache]: Analyzing trace with hash -405037921, now seen corresponding path program 3 times [2022-11-21 16:47:30,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:47:30,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609641864] [2022-11-21 16:47:30,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:47:30,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:47:30,674 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:47:30,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1468229726] [2022-11-21 16:47:30,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:47:30,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:47:30,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:47:30,676 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:47:30,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-21 16:47:30,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-21 16:47:30,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:47:30,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-21 16:47:30,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:47:31,222 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 159 proven. 47 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2022-11-21 16:47:31,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:47:36,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:47:36,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609641864] [2022-11-21 16:47:36,097 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:47:36,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468229726] [2022-11-21 16:47:36,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468229726] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:47:36,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:47:36,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-11-21 16:47:36,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225280472] [2022-11-21 16:47:36,098 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-21 16:47:36,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 16:47:36,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:47:36,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 16:47:36,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-11-21 16:47:36,099 INFO L87 Difference]: Start difference. First operand 533 states and 643 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-21 16:47:36,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:47:36,619 INFO L93 Difference]: Finished difference Result 548 states and 657 transitions. [2022-11-21 16:47:36,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 16:47:36,620 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) Word has length 122 [2022-11-21 16:47:36,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:47:36,623 INFO L225 Difference]: With dead ends: 548 [2022-11-21 16:47:36,624 INFO L226 Difference]: Without dead ends: 542 [2022-11-21 16:47:36,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-11-21 16:47:36,625 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 42 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:47:36,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 63 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:47:36,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-11-21 16:47:36,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 538. [2022-11-21 16:47:36,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 366 states have (on average 1.1311475409836065) internal successors, (414), 384 states have internal predecessors, (414), 117 states have call successors, (117), 55 states have call predecessors, (117), 54 states have return successors, (114), 98 states have call predecessors, (114), 114 states have call successors, (114) [2022-11-21 16:47:36,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 645 transitions. [2022-11-21 16:47:36,924 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 645 transitions. Word has length 122 [2022-11-21 16:47:36,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:47:36,925 INFO L495 AbstractCegarLoop]: Abstraction has 538 states and 645 transitions. [2022-11-21 16:47:36,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-21 16:47:36,925 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 645 transitions. [2022-11-21 16:47:36,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-11-21 16:47:36,927 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:47:36,928 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:47:36,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-21 16:47:37,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-21 16:47:37,134 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:47:37,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:47:37,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1989463840, now seen corresponding path program 3 times [2022-11-21 16:47:37,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:47:37,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147388865] [2022-11-21 16:47:37,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:47:37,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:47:37,144 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:47:37,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1851552198] [2022-11-21 16:47:37,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:47:37,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:47:37,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:47:37,148 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:47:37,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-21 16:47:37,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-21 16:47:37,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:47:37,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-21 16:47:37,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:47:37,475 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 163 proven. 56 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2022-11-21 16:47:37,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:47:37,741 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 152 proven. 2 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2022-11-21 16:47:37,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:47:37,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147388865] [2022-11-21 16:47:37,742 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:47:37,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851552198] [2022-11-21 16:47:37,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851552198] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:47:37,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:47:37,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2022-11-21 16:47:37,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069748469] [2022-11-21 16:47:37,744 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:47:37,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-21 16:47:37,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:47:37,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-21 16:47:37,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-11-21 16:47:37,746 INFO L87 Difference]: Start difference. First operand 538 states and 645 transitions. Second operand has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2022-11-21 16:47:38,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:47:38,487 INFO L93 Difference]: Finished difference Result 545 states and 651 transitions. [2022-11-21 16:47:38,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-21 16:47:38,488 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) Word has length 133 [2022-11-21 16:47:38,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:47:38,493 INFO L225 Difference]: With dead ends: 545 [2022-11-21 16:47:38,493 INFO L226 Difference]: Without dead ends: 535 [2022-11-21 16:47:38,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2022-11-21 16:47:38,495 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 95 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:47:38,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 82 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:47:38,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-11-21 16:47:38,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 379. [2022-11-21 16:47:38,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 256 states have (on average 1.09765625) internal successors, (281), 268 states have internal predecessors, (281), 75 states have call successors, (75), 47 states have call predecessors, (75), 47 states have return successors, (74), 63 states have call predecessors, (74), 74 states have call successors, (74) [2022-11-21 16:47:38,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 430 transitions. [2022-11-21 16:47:38,757 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 430 transitions. Word has length 133 [2022-11-21 16:47:38,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:47:38,757 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 430 transitions. [2022-11-21 16:47:38,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2022-11-21 16:47:38,758 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 430 transitions. [2022-11-21 16:47:38,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-21 16:47:38,760 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:47:38,760 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 8, 7, 7, 7, 7, 7, 7, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:47:38,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-21 16:47:38,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-21 16:47:38,966 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:47:38,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:47:38,967 INFO L85 PathProgramCache]: Analyzing trace with hash -806632286, now seen corresponding path program 2 times [2022-11-21 16:47:38,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:47:38,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967095227] [2022-11-21 16:47:38,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:47:38,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:47:38,990 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:47:38,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1632497022] [2022-11-21 16:47:38,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:47:38,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:47:38,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:47:38,992 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:47:39,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-21 16:47:39,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:47:39,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:47:39,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-21 16:47:39,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:47:39,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 606 proven. 0 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2022-11-21 16:47:39,340 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:47:39,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:47:39,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967095227] [2022-11-21 16:47:39,340 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:47:39,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632497022] [2022-11-21 16:47:39,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632497022] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:47:39,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:47:39,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 16:47:39,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279413415] [2022-11-21 16:47:39,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:47:39,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:47:39,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:47:39,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:47:39,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:47:39,342 INFO L87 Difference]: Start difference. First operand 379 states and 430 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-21 16:47:39,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:47:39,827 INFO L93 Difference]: Finished difference Result 543 states and 634 transitions. [2022-11-21 16:47:39,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:47:39,828 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 160 [2022-11-21 16:47:39,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:47:39,830 INFO L225 Difference]: With dead ends: 543 [2022-11-21 16:47:39,830 INFO L226 Difference]: Without dead ends: 384 [2022-11-21 16:47:39,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-21 16:47:39,832 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 22 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:47:39,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 103 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:47:39,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-11-21 16:47:40,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 325. [2022-11-21 16:47:40,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 222 states have (on average 1.0765765765765767) internal successors, (239), 228 states have internal predecessors, (239), 59 states have call successors, (59), 43 states have call predecessors, (59), 43 states have return successors, (58), 53 states have call predecessors, (58), 58 states have call successors, (58) [2022-11-21 16:47:40,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 356 transitions. [2022-11-21 16:47:40,115 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 356 transitions. Word has length 160 [2022-11-21 16:47:40,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:47:40,116 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 356 transitions. [2022-11-21 16:47:40,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-21 16:47:40,116 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 356 transitions. [2022-11-21 16:47:40,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-11-21 16:47:40,118 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:47:40,118 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:47:40,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-21 16:47:40,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-21 16:47:40,324 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:47:40,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:47:40,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1705968445, now seen corresponding path program 1 times [2022-11-21 16:47:40,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:47:40,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108129606] [2022-11-21 16:47:40,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:47:40,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:47:40,338 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:47:40,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1482863872] [2022-11-21 16:47:40,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:47:40,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:47:40,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:47:40,340 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:47:40,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-21 16:47:40,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:47:40,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-21 16:47:40,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:47:40,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1290 backedges. 417 proven. 69 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2022-11-21 16:47:40,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:47:41,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1290 backedges. 105 proven. 69 refuted. 0 times theorem prover too weak. 1116 trivial. 0 not checked. [2022-11-21 16:47:41,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:47:41,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108129606] [2022-11-21 16:47:41,064 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:47:41,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482863872] [2022-11-21 16:47:41,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482863872] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:47:41,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:47:41,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-11-21 16:47:41,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014642387] [2022-11-21 16:47:41,065 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:47:41,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-21 16:47:41,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:47:41,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-21 16:47:41,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-21 16:47:41,066 INFO L87 Difference]: Start difference. First operand 325 states and 356 transitions. Second operand has 9 states, 9 states have (on average 7.0) internal successors, (63), 9 states have internal predecessors, (63), 8 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (39), 8 states have call predecessors, (39), 8 states have call successors, (39) [2022-11-21 16:47:41,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:47:41,566 INFO L93 Difference]: Finished difference Result 386 states and 430 transitions. [2022-11-21 16:47:41,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:47:41,567 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.0) internal successors, (63), 9 states have internal predecessors, (63), 8 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (39), 8 states have call predecessors, (39), 8 states have call successors, (39) Word has length 164 [2022-11-21 16:47:41,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:47:41,575 INFO L225 Difference]: With dead ends: 386 [2022-11-21 16:47:41,575 INFO L226 Difference]: Without dead ends: 302 [2022-11-21 16:47:41,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 317 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-21 16:47:41,576 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 2 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:47:41,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 333 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:47:41,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-11-21 16:47:41,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 302. [2022-11-21 16:47:41,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 206 states have (on average 1.0728155339805825) internal successors, (221), 211 states have internal predecessors, (221), 54 states have call successors, (54), 41 states have call predecessors, (54), 41 states have return successors, (53), 49 states have call predecessors, (53), 53 states have call successors, (53) [2022-11-21 16:47:41,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 328 transitions. [2022-11-21 16:47:41,763 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 328 transitions. Word has length 164 [2022-11-21 16:47:41,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:47:41,764 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 328 transitions. [2022-11-21 16:47:41,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.0) internal successors, (63), 9 states have internal predecessors, (63), 8 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (39), 8 states have call predecessors, (39), 8 states have call successors, (39) [2022-11-21 16:47:41,764 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 328 transitions. [2022-11-21 16:47:41,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-11-21 16:47:41,765 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:47:41,765 INFO L195 NwaCegarLoop]: trace histogram [26, 25, 25, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:47:41,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-21 16:47:41,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:47:41,966 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:47:41,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:47:41,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1021836698, now seen corresponding path program 2 times [2022-11-21 16:47:41,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:47:41,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827916200] [2022-11-21 16:47:41,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:47:41,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:47:41,977 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:47:41,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [318736546] [2022-11-21 16:47:41,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:47:41,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:47:41,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:47:41,987 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:47:41,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2abbbcc7-4390-421c-aa69-ba9a727854e4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-21 16:47:42,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:47:42,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:47:42,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-21 16:47:42,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:47:42,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 64 proven. 116 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2022-11-21 16:47:42,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:47:52,481 WARN L233 SmtUtils]: Spent 6.19s on a formula simplification that was a NOOP. DAG size: 80 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:48:20,632 WARN L233 SmtUtils]: Spent 21.88s on a formula simplification. DAG size of input: 4951 DAG size of output: 4755 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)