./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b0dc7e6cdf006545b97e616af165994b39a2e54c024b52d6607380c5e84ee914 --- Real Ultimate output --- [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-8393723 [2022-11-18 20:34:33,673 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:34:33,675 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:34:33,712 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:34:33,714 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:34:33,715 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:34:33,717 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:34:33,720 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:34:33,725 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:34:33,726 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:34:33,728 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:34:33,729 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:34:33,731 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:34:33,734 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:34:33,735 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:34:33,738 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:34:33,740 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:34:33,743 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:34:33,744 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:34:33,748 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:34:33,754 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:34:33,758 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:34:33,759 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:34:33,760 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:34:33,763 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:34:33,763 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:34:33,763 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:34:33,764 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:34:33,765 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:34:33,765 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:34:33,766 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:34:33,766 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:34:33,767 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:34:33,768 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:34:33,769 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:34:33,769 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:34:33,769 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:34:33,770 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:34:33,777 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:34:33,778 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:34:33,778 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:34:33,780 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 20:34:33,814 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:34:33,814 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:34:33,814 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:34:33,815 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:34:33,815 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:34:33,815 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:34:33,816 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:34:33,816 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:34:33,816 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:34:33,817 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:34:33,817 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:34:33,817 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:34:33,817 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:34:33,818 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:34:33,818 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:34:33,818 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:34:33,821 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:34:33,822 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:34:33,822 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:34:33,822 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:34:33,822 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:34:33,822 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:34:33,823 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:34:33,823 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:34:33,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:34:33,823 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:34:33,824 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:34:33,824 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:34:33,825 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:34:33,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:34:33,825 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:34:33,825 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:34:33,826 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:34:33,826 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_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b0dc7e6cdf006545b97e616af165994b39a2e54c024b52d6607380c5e84ee914 [2022-11-18 20:34:34,148 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:34:34,168 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:34:34,170 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:34:34,172 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:34:34,172 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:34:34,173 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound20.c [2022-11-18 20:34:34,232 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/data/d56cecb3f/999bda1bf4164644966de3f17a823d66/FLAG491ec1523 [2022-11-18 20:34:34,721 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:34:34,722 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound20.c [2022-11-18 20:34:34,728 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/data/d56cecb3f/999bda1bf4164644966de3f17a823d66/FLAG491ec1523 [2022-11-18 20:34:35,096 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/data/d56cecb3f/999bda1bf4164644966de3f17a823d66 [2022-11-18 20:34:35,099 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:34:35,100 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:34:35,104 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:34:35,104 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:34:35,107 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:34:35,108 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:34:35" (1/1) ... [2022-11-18 20:34:35,109 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a625aee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:34:35, skipping insertion in model container [2022-11-18 20:34:35,109 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:34:35" (1/1) ... [2022-11-18 20:34:35,117 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:34:35,130 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:34:35,280 WARN L234 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_74af03ce-8300-43d5-b7b0-ec20f5ada198/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound20.c[526,539] [2022-11-18 20:34:35,334 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:34:35,343 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:34:35,355 WARN L234 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_74af03ce-8300-43d5-b7b0-ec20f5ada198/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound20.c[526,539] [2022-11-18 20:34:35,360 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:34:35,372 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:34:35,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:34:35 WrapperNode [2022-11-18 20:34:35,372 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:34:35,374 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:34:35,374 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:34:35,374 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:34:35,382 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:34:35" (1/1) ... [2022-11-18 20:34:35,388 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:34:35" (1/1) ... [2022-11-18 20:34:35,406 INFO L138 Inliner]: procedures = 14, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2022-11-18 20:34:35,407 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:34:35,407 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:34:35,407 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:34:35,408 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:34:35,416 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:34:35" (1/1) ... [2022-11-18 20:34:35,417 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:34:35" (1/1) ... [2022-11-18 20:34:35,418 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:34:35" (1/1) ... [2022-11-18 20:34:35,418 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:34:35" (1/1) ... [2022-11-18 20:34:35,421 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:34:35" (1/1) ... [2022-11-18 20:34:35,425 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:34:35" (1/1) ... [2022-11-18 20:34:35,426 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:34:35" (1/1) ... [2022-11-18 20:34:35,426 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:34:35" (1/1) ... [2022-11-18 20:34:35,428 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:34:35,429 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:34:35,429 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:34:35,429 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:34:35,430 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:34:35" (1/1) ... [2022-11-18 20:34:35,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:34:35,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:34:35,463 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:34:35,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:34:35,521 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:34:35,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 20:34:35,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:34:35,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:34:35,522 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-18 20:34:35,522 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-18 20:34:35,596 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:34:35,600 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:34:35,831 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:34:35,836 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:34:35,836 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-18 20:34:35,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:34:35 BoogieIcfgContainer [2022-11-18 20:34:35,846 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:34:35,850 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:34:35,850 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:34:35,854 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:34:35,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:34:35" (1/3) ... [2022-11-18 20:34:35,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ef85a26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:34:35, skipping insertion in model container [2022-11-18 20:34:35,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:34:35" (2/3) ... [2022-11-18 20:34:35,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ef85a26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:34:35, skipping insertion in model container [2022-11-18 20:34:35,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:34:35" (3/3) ... [2022-11-18 20:34:35,858 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound20.c [2022-11-18 20:34:35,880 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:34:35,880 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 20:34:35,951 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:34:35,960 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;@17454cfb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:34:35,961 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 20:34:35,967 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) [2022-11-18 20:34:35,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-18 20:34:35,974 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:35,975 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:34:35,976 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:34:35,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:35,983 INFO L85 PathProgramCache]: Analyzing trace with hash 643118537, now seen corresponding path program 1 times [2022-11-18 20:34:35,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:35,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670706189] [2022-11-18 20:34:35,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:35,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:36,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:36,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:36,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670706189] [2022-11-18 20:34:36,150 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-18 20:34:36,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816133412] [2022-11-18 20:34:36,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:36,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:36,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:34:36,158 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:34:36,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:34:36,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:36,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-18 20:34:36,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:34:36,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:34:36,285 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:34:36,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816133412] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:34:36,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:34:36,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:34:36,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203740496] [2022-11-18 20:34:36,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:34:36,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 20:34:36,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:36,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 20:34:36,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:34:36,324 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) [2022-11-18 20:34:36,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:36,346 INFO L93 Difference]: Finished difference Result 50 states and 83 transitions. [2022-11-18 20:34:36,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 20:34:36,348 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 [2022-11-18 20:34:36,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:36,356 INFO L225 Difference]: With dead ends: 50 [2022-11-18 20:34:36,356 INFO L226 Difference]: Without dead ends: 22 [2022-11-18 20:34:36,360 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 [2022-11-18 20:34:36,363 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 [2022-11-18 20:34:36,364 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] [2022-11-18 20:34:36,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-18 20:34:36,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-18 20:34:36,399 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) [2022-11-18 20:34:36,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 32 transitions. [2022-11-18 20:34:36,401 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 32 transitions. Word has length 8 [2022-11-18 20:34:36,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:36,402 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 32 transitions. [2022-11-18 20:34:36,402 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) [2022-11-18 20:34:36,402 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 32 transitions. [2022-11-18 20:34:36,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-18 20:34:36,403 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:36,403 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:34:36,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 20:34:36,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-18 20:34:36,609 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:34:36,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:36,610 INFO L85 PathProgramCache]: Analyzing trace with hash 181060127, now seen corresponding path program 1 times [2022-11-18 20:34:36,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:36,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525467107] [2022-11-18 20:34:36,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:36,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:36,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:36,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:34:36,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:36,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525467107] [2022-11-18 20:34:36,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525467107] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:34:36,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:34:36,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 20:34:36,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24916639] [2022-11-18 20:34:36,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:34:36,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:34:36,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:36,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:34:36,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:34:36,833 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) [2022-11-18 20:34:36,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:36,915 INFO L93 Difference]: Finished difference Result 36 states and 51 transitions. [2022-11-18 20:34:36,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:34:36,919 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 [2022-11-18 20:34:36,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:36,920 INFO L225 Difference]: With dead ends: 36 [2022-11-18 20:34:36,920 INFO L226 Difference]: Without dead ends: 34 [2022-11-18 20:34:36,920 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 [2022-11-18 20:34:36,921 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, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:34:36,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 99 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:34:36,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-18 20:34:36,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2022-11-18 20:34:36,931 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) [2022-11-18 20:34:36,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2022-11-18 20:34:36,932 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 8 [2022-11-18 20:34:36,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:36,933 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2022-11-18 20:34:36,933 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) [2022-11-18 20:34:36,933 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2022-11-18 20:34:36,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 20:34:36,934 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:36,934 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:34:36,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 20:34:36,935 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:34:36,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:36,935 INFO L85 PathProgramCache]: Analyzing trace with hash -712280900, now seen corresponding path program 1 times [2022-11-18 20:34:36,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:36,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971694971] [2022-11-18 20:34:36,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:36,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:36,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:36,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:36,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971694971] [2022-11-18 20:34:36,983 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-18 20:34:36,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641732049] [2022-11-18 20:34:36,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:36,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:36,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:34:36,999 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:34:37,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:34:37,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:37,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 20:34:37,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:34:37,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:34:37,117 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:34:37,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641732049] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:34:37,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:34:37,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:34:37,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103731607] [2022-11-18 20:34:37,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:34:37,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:34:37,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:37,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:34:37,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:34:37,122 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) [2022-11-18 20:34:37,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:37,162 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2022-11-18 20:34:37,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:34:37,164 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 [2022-11-18 20:34:37,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:37,165 INFO L225 Difference]: With dead ends: 42 [2022-11-18 20:34:37,165 INFO L226 Difference]: Without dead ends: 28 [2022-11-18 20:34:37,166 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 [2022-11-18 20:34:37,167 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 [2022-11-18 20:34:37,167 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] [2022-11-18 20:34:37,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-18 20:34:37,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-18 20:34:37,179 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) [2022-11-18 20:34:37,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2022-11-18 20:34:37,181 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 10 [2022-11-18 20:34:37,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:37,181 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2022-11-18 20:34:37,182 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) [2022-11-18 20:34:37,182 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2022-11-18 20:34:37,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 20:34:37,183 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:37,183 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:34:37,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 20:34:37,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:37,390 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:34:37,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:37,391 INFO L85 PathProgramCache]: Analyzing trace with hash 2036073049, now seen corresponding path program 1 times [2022-11-18 20:34:37,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:37,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474501182] [2022-11-18 20:34:37,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:37,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:37,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:37,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-18 20:34:37,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:37,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:34:37,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:37,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474501182] [2022-11-18 20:34:37,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474501182] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:34:37,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:34:37,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 20:34:37,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940716259] [2022-11-18 20:34:37,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:34:37,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:34:37,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:37,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:34:37,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:34:37,537 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) [2022-11-18 20:34:37,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:37,630 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2022-11-18 20:34:37,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:34:37,630 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 [2022-11-18 20:34:37,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:37,632 INFO L225 Difference]: With dead ends: 42 [2022-11-18 20:34:37,632 INFO L226 Difference]: Without dead ends: 40 [2022-11-18 20:34:37,633 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 [2022-11-18 20:34:37,635 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, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:34:37,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 95 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:34:37,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-18 20:34:37,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2022-11-18 20:34:37,650 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) [2022-11-18 20:34:37,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2022-11-18 20:34:37,653 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 13 [2022-11-18 20:34:37,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:37,653 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2022-11-18 20:34:37,654 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) [2022-11-18 20:34:37,655 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2022-11-18 20:34:37,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-18 20:34:37,656 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:37,656 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:34:37,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 20:34:37,657 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:34:37,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:37,658 INFO L85 PathProgramCache]: Analyzing trace with hash 380169759, now seen corresponding path program 1 times [2022-11-18 20:34:37,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:37,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593658565] [2022-11-18 20:34:37,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:37,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:37,669 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:34:37,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1011088296] [2022-11-18 20:34:37,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:37,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:37,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:34:37,671 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:34:37,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:34:37,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:37,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 20:34:37,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:34:37,884 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:34:37,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:34:38,080 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:34:38,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:38,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593658565] [2022-11-18 20:34:38,081 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:34:38,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011088296] [2022-11-18 20:34:38,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011088296] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:34:38,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:34:38,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2022-11-18 20:34:38,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449973774] [2022-11-18 20:34:38,087 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:34:38,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:34:38,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:38,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:34:38,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:34:38,089 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) [2022-11-18 20:34:38,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:38,545 INFO L93 Difference]: Finished difference Result 71 states and 96 transitions. [2022-11-18 20:34:38,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:34:38,546 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 [2022-11-18 20:34:38,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:38,548 INFO L225 Difference]: With dead ends: 71 [2022-11-18 20:34:38,548 INFO L226 Difference]: Without dead ends: 56 [2022-11-18 20:34:38,549 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 [2022-11-18 20:34:38,550 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 48 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2022-11-18 20:34:38,550 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] [2022-11-18 20:34:38,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-18 20:34:38,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2022-11-18 20:34:38,567 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) [2022-11-18 20:34:38,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2022-11-18 20:34:38,576 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 18 [2022-11-18 20:34:38,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:38,576 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2022-11-18 20:34:38,576 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) [2022-11-18 20:34:38,577 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2022-11-18 20:34:38,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-18 20:34:38,579 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:38,579 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:34:38,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:34:38,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:38,785 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:34:38,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:38,785 INFO L85 PathProgramCache]: Analyzing trace with hash -461064832, now seen corresponding path program 1 times [2022-11-18 20:34:38,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:38,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247090185] [2022-11-18 20:34:38,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:38,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:38,808 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:34:38,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [707503572] [2022-11-18 20:34:38,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:38,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:38,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:34:38,811 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:34:38,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:34:38,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:38,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 20:34:38,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:34:39,037 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:34:39,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:34:39,243 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:34:39,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:39,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247090185] [2022-11-18 20:34:39,246 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:34:39,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707503572] [2022-11-18 20:34:39,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707503572] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:34:39,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:34:39,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-11-18 20:34:39,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601817490] [2022-11-18 20:34:39,247 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:34:39,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 20:34:39,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:39,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 20:34:39,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-18 20:34:39,250 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) [2022-11-18 20:34:39,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:39,434 INFO L93 Difference]: Finished difference Result 73 states and 97 transitions. [2022-11-18 20:34:39,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:34:39,436 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 [2022-11-18 20:34:39,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:39,442 INFO L225 Difference]: With dead ends: 73 [2022-11-18 20:34:39,442 INFO L226 Difference]: Without dead ends: 65 [2022-11-18 20:34:39,444 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 [2022-11-18 20:34:39,446 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, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:34:39,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 71 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:34:39,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-18 20:34:39,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2022-11-18 20:34:39,472 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) [2022-11-18 20:34:39,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 81 transitions. [2022-11-18 20:34:39,477 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 81 transitions. Word has length 26 [2022-11-18 20:34:39,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:39,477 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 81 transitions. [2022-11-18 20:34:39,477 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) [2022-11-18 20:34:39,477 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 81 transitions. [2022-11-18 20:34:39,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-18 20:34:39,479 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:39,479 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] [2022-11-18 20:34:39,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-18 20:34:39,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-18 20:34:39,684 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:34:39,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:39,684 INFO L85 PathProgramCache]: Analyzing trace with hash 847666457, now seen corresponding path program 1 times [2022-11-18 20:34:39,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:39,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31034179] [2022-11-18 20:34:39,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:39,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:39,694 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:34:39,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [60792038] [2022-11-18 20:34:39,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:39,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:39,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:34:39,696 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:34:39,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 20:34:39,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:39,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 20:34:39,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:34:39,802 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-18 20:34:39,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:34:39,861 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-18 20:34:39,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:39,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31034179] [2022-11-18 20:34:39,862 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:34:39,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60792038] [2022-11-18 20:34:39,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60792038] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:34:39,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:34:39,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-11-18 20:34:39,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812310190] [2022-11-18 20:34:39,863 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:34:39,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 20:34:39,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:39,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 20:34:39,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:34:39,864 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) [2022-11-18 20:34:39,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:39,974 INFO L93 Difference]: Finished difference Result 165 states and 205 transitions. [2022-11-18 20:34:39,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 20:34:39,975 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 [2022-11-18 20:34:39,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:39,976 INFO L225 Difference]: With dead ends: 165 [2022-11-18 20:34:39,977 INFO L226 Difference]: Without dead ends: 127 [2022-11-18 20:34:39,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-18 20:34:39,978 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 [2022-11-18 20:34:39,979 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] [2022-11-18 20:34:39,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-18 20:34:39,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 121. [2022-11-18 20:34:39,998 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) [2022-11-18 20:34:39,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 144 transitions. [2022-11-18 20:34:39,999 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 144 transitions. Word has length 33 [2022-11-18 20:34:40,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:40,000 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 144 transitions. [2022-11-18 20:34:40,000 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) [2022-11-18 20:34:40,000 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 144 transitions. [2022-11-18 20:34:40,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-18 20:34:40,001 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:40,002 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] [2022-11-18 20:34:40,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 20:34:40,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-18 20:34:40,207 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:34:40,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:40,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1605675221, now seen corresponding path program 1 times [2022-11-18 20:34:40,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:40,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230091648] [2022-11-18 20:34:40,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:40,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:40,217 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:34:40,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1737694801] [2022-11-18 20:34:40,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:40,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:40,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:34:40,219 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:34:40,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 20:34:40,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:40,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 20:34:40,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:34:40,378 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-18 20:34:40,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:34:40,480 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-18 20:34:40,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:40,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230091648] [2022-11-18 20:34:40,481 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:34:40,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737694801] [2022-11-18 20:34:40,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737694801] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:34:40,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:34:40,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2022-11-18 20:34:40,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772741374] [2022-11-18 20:34:40,482 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:34:40,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:34:40,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:40,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:34:40,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:34:40,485 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) [2022-11-18 20:34:40,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:40,698 INFO L93 Difference]: Finished difference Result 249 states and 307 transitions. [2022-11-18 20:34:40,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 20:34:40,699 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 [2022-11-18 20:34:40,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:40,703 INFO L225 Difference]: With dead ends: 249 [2022-11-18 20:34:40,703 INFO L226 Difference]: Without dead ends: 228 [2022-11-18 20:34:40,704 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 [2022-11-18 20:34:40,705 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 103 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:34:40,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 261 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:34:40,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-11-18 20:34:40,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 221. [2022-11-18 20:34:40,751 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) [2022-11-18 20:34:40,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 270 transitions. [2022-11-18 20:34:40,753 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 270 transitions. Word has length 49 [2022-11-18 20:34:40,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:40,754 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 270 transitions. [2022-11-18 20:34:40,754 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) [2022-11-18 20:34:40,754 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 270 transitions. [2022-11-18 20:34:40,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-18 20:34:40,756 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:40,756 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] [2022-11-18 20:34:40,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:34:40,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:40,962 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:34:40,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:40,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1800695307, now seen corresponding path program 1 times [2022-11-18 20:34:40,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:40,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737735347] [2022-11-18 20:34:40,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:40,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:40,972 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:34:40,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [320886467] [2022-11-18 20:34:40,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:40,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:40,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:34:40,974 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:34:40,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 20:34:41,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:41,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-18 20:34:41,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:34:41,424 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 18 proven. 28 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-18 20:34:41,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:34:42,999 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 18 proven. 28 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-18 20:34:43,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:43,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737735347] [2022-11-18 20:34:43,000 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:34:43,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320886467] [2022-11-18 20:34:43,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320886467] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:34:43,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:34:43,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-11-18 20:34:43,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859540016] [2022-11-18 20:34:43,001 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:34:43,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-18 20:34:43,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:43,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-18 20:34:43,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-11-18 20:34:43,003 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) [2022-11-18 20:34:48,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:34:50,610 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:34:51,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:51,529 INFO L93 Difference]: Finished difference Result 372 states and 479 transitions. [2022-11-18 20:34:51,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 20:34:51,530 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 [2022-11-18 20:34:51,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:51,532 INFO L225 Difference]: With dead ends: 372 [2022-11-18 20:34:51,532 INFO L226 Difference]: Without dead ends: 299 [2022-11-18 20:34:51,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:34:51,534 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 74 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:34:51,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 147 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-18 20:34:51,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-11-18 20:34:51,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 272. [2022-11-18 20:34:51,616 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) [2022-11-18 20:34:51,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 338 transitions. [2022-11-18 20:34:51,619 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 338 transitions. Word has length 58 [2022-11-18 20:34:51,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:51,622 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 338 transitions. [2022-11-18 20:34:51,622 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) [2022-11-18 20:34:51,622 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 338 transitions. [2022-11-18 20:34:51,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-18 20:34:51,633 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:51,633 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] [2022-11-18 20:34:51,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 20:34:51,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-18 20:34:51,847 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:34:51,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:51,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1688778742, now seen corresponding path program 1 times [2022-11-18 20:34:51,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:51,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226420252] [2022-11-18 20:34:51,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:51,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:51,858 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:34:51,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1018288646] [2022-11-18 20:34:51,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:51,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:51,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:34:51,870 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:34:51,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 20:34:51,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:51,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-18 20:34:51,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:34:52,298 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-11-18 20:34:52,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:34:52,973 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-11-18 20:34:52,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:52,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226420252] [2022-11-18 20:34:52,973 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:34:52,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018288646] [2022-11-18 20:34:52,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018288646] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:34:52,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:34:52,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2022-11-18 20:34:52,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708526682] [2022-11-18 20:34:52,975 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:34:52,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 20:34:52,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:52,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 20:34:52,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-11-18 20:34:52,976 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) [2022-11-18 20:34:54,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:54,178 INFO L93 Difference]: Finished difference Result 341 states and 423 transitions. [2022-11-18 20:34:54,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 20:34:54,183 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 [2022-11-18 20:34:54,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:54,185 INFO L225 Difference]: With dead ends: 341 [2022-11-18 20:34:54,185 INFO L226 Difference]: Without dead ends: 260 [2022-11-18 20:34:54,185 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 [2022-11-18 20:34:54,186 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 67 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:34:54,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 111 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-18 20:34:54,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-11-18 20:34:54,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 236. [2022-11-18 20:34:54,276 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) [2022-11-18 20:34:54,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 280 transitions. [2022-11-18 20:34:54,278 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 280 transitions. Word has length 69 [2022-11-18 20:34:54,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:54,279 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 280 transitions. [2022-11-18 20:34:54,279 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) [2022-11-18 20:34:54,279 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 280 transitions. [2022-11-18 20:34:54,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-18 20:34:54,282 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:54,283 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] [2022-11-18 20:34:54,290 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-18 20:34:54,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:54,488 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:34:54,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:54,488 INFO L85 PathProgramCache]: Analyzing trace with hash -428937714, now seen corresponding path program 1 times [2022-11-18 20:34:54,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:54,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117956707] [2022-11-18 20:34:54,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:54,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:54,515 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:34:54,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [791980936] [2022-11-18 20:34:54,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:54,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:54,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:34:54,517 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:34:54,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 20:34:54,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:54,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-18 20:34:54,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:34:54,824 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 24 proven. 39 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-18 20:34:54,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:34:55,359 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 24 proven. 39 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-18 20:34:55,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:55,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117956707] [2022-11-18 20:34:55,362 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:34:55,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791980936] [2022-11-18 20:34:55,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791980936] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:34:55,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:34:55,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2022-11-18 20:34:55,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423036978] [2022-11-18 20:34:55,364 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:34:55,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 20:34:55,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:55,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 20:34:55,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-11-18 20:34:55,366 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) [2022-11-18 20:34:55,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:55,966 INFO L93 Difference]: Finished difference Result 260 states and 307 transitions. [2022-11-18 20:34:55,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 20:34:55,967 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 [2022-11-18 20:34:55,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:55,968 INFO L225 Difference]: With dead ends: 260 [2022-11-18 20:34:55,968 INFO L226 Difference]: Without dead ends: 215 [2022-11-18 20:34:55,969 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 [2022-11-18 20:34:55,970 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 52 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:34:55,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 165 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 20:34:55,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-11-18 20:34:56,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 210. [2022-11-18 20:34:56,031 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) [2022-11-18 20:34:56,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 244 transitions. [2022-11-18 20:34:56,032 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 244 transitions. Word has length 74 [2022-11-18 20:34:56,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:56,033 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 244 transitions. [2022-11-18 20:34:56,033 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) [2022-11-18 20:34:56,033 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 244 transitions. [2022-11-18 20:34:56,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-18 20:34:56,034 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:56,035 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] [2022-11-18 20:34:56,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 20:34:56,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:56,240 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:34:56,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:56,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1611798954, now seen corresponding path program 2 times [2022-11-18 20:34:56,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:56,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143350552] [2022-11-18 20:34:56,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:56,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:56,250 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:34:56,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1990915091] [2022-11-18 20:34:56,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:34:56,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:56,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:34:56,252 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:34:56,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 20:34:56,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:34:56,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:34:56,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-18 20:34:56,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:34:56,865 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 28 proven. 64 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-11-18 20:34:56,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:35:33,342 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 28 proven. 64 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-11-18 20:35:33,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:35:33,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143350552] [2022-11-18 20:35:33,343 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:35:33,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990915091] [2022-11-18 20:35:33,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990915091] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:35:33,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:35:33,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2022-11-18 20:35:33,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20127643] [2022-11-18 20:35:33,344 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:35:33,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-18 20:35:33,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:35:33,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-18 20:35:33,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=336, Unknown=2, NotChecked=0, Total=420 [2022-11-18 20:35:33,346 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) [2022-11-18 20:35:57,668 WARN L233 SmtUtils]: Spent 23.22s 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) [2022-11-18 20:36:02,676 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:36:09,571 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 [] [2022-11-18 20:36:11,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:36:11,077 INFO L93 Difference]: Finished difference Result 306 states and 390 transitions. [2022-11-18 20:36:11,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 20:36:11,078 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 [2022-11-18 20:36:11,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:36:11,080 INFO L225 Difference]: With dead ends: 306 [2022-11-18 20:36:11,080 INFO L226 Difference]: Without dead ends: 262 [2022-11-18 20:36:11,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 34.8s TimeCoverageRelationStatistics Valid=151, Invalid=549, Unknown=2, NotChecked=0, Total=702 [2022-11-18 20:36:11,081 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 159 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 215 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s 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, 11.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:36:11,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 328 Invalid, 1278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 1062 Invalid, 1 Unknown, 0 Unchecked, 11.9s Time] [2022-11-18 20:36:11,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-11-18 20:36:11,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 247. [2022-11-18 20:36:11,178 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) [2022-11-18 20:36:11,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 305 transitions. [2022-11-18 20:36:11,179 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 305 transitions. Word has length 90 [2022-11-18 20:36:11,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:36:11,180 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 305 transitions. [2022-11-18 20:36:11,180 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) [2022-11-18 20:36:11,180 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 305 transitions. [2022-11-18 20:36:11,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-18 20:36:11,182 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:36:11,182 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] [2022-11-18 20:36:11,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 20:36:11,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:36:11,388 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:36:11,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:36:11,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1991126182, now seen corresponding path program 1 times [2022-11-18 20:36:11,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:36:11,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112346245] [2022-11-18 20:36:11,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:36:11,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:36:11,404 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:36:11,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1246808193] [2022-11-18 20:36:11,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:36:11,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:36:11,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:36:11,406 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:36:11,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 20:36:11,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:36:11,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 20:36:11,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:36:11,616 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 120 proven. 260 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-18 20:36:11,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:36:11,800 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2022-11-18 20:36:11,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:36:11,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112346245] [2022-11-18 20:36:11,801 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:36:11,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246808193] [2022-11-18 20:36:11,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246808193] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:36:11,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:36:11,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-11-18 20:36:11,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845304460] [2022-11-18 20:36:11,802 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:36:11,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:36:11,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:36:11,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:36:11,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:36:11,805 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) [2022-11-18 20:36:12,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:36:12,453 INFO L93 Difference]: Finished difference Result 707 states and 937 transitions. [2022-11-18 20:36:12,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-18 20:36:12,454 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 [2022-11-18 20:36:12,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:36:12,459 INFO L225 Difference]: With dead ends: 707 [2022-11-18 20:36:12,459 INFO L226 Difference]: Without dead ends: 629 [2022-11-18 20:36:12,460 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 [2022-11-18 20:36:12,461 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, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:36:12,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 293 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:36:12,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2022-11-18 20:36:12,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 549. [2022-11-18 20:36:12,706 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) [2022-11-18 20:36:12,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 721 transitions. [2022-11-18 20:36:12,710 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 721 transitions. Word has length 96 [2022-11-18 20:36:12,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:36:12,710 INFO L495 AbstractCegarLoop]: Abstraction has 549 states and 721 transitions. [2022-11-18 20:36:12,711 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) [2022-11-18 20:36:12,711 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 721 transitions. [2022-11-18 20:36:12,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-18 20:36:12,712 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:36:12,713 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] [2022-11-18 20:36:12,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 20:36:12,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:36:12,922 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:36:12,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:36:12,923 INFO L85 PathProgramCache]: Analyzing trace with hash -218084043, now seen corresponding path program 2 times [2022-11-18 20:36:12,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:36:12,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57477657] [2022-11-18 20:36:12,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:36:12,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:36:12,933 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:36:12,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1328425213] [2022-11-18 20:36:12,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:36:12,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:36:12,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:36:12,935 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:36:12,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 20:36:13,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:36:13,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:36:13,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-18 20:36:13,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:36:13,484 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 32 proven. 74 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-11-18 20:36:13,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:36:22,753 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 32 proven. 74 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-11-18 20:36:22,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:36:22,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57477657] [2022-11-18 20:36:22,753 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:36:22,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328425213] [2022-11-18 20:36:22,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328425213] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:36:22,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:36:22,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2022-11-18 20:36:22,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597203732] [2022-11-18 20:36:22,754 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:36:22,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-18 20:36:22,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:36:22,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-18 20:36:22,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-11-18 20:36:22,756 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) [2022-11-18 20:36:30,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.27s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:36:37,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:36:37,594 INFO L93 Difference]: Finished difference Result 672 states and 874 transitions. [2022-11-18 20:36:37,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-18 20:36:37,594 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 [2022-11-18 20:36:37,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:36:37,597 INFO L225 Difference]: With dead ends: 672 [2022-11-18 20:36:37,597 INFO L226 Difference]: Without dead ends: 511 [2022-11-18 20:36:37,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 178 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=227, Invalid=765, Unknown=0, NotChecked=0, Total=992 [2022-11-18 20:36:37,599 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 119 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 175 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:36:37,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 237 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 830 Invalid, 1 Unknown, 0 Unchecked, 6.4s Time] [2022-11-18 20:36:37,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-11-18 20:36:37,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 488. [2022-11-18 20:36:37,852 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) [2022-11-18 20:36:37,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 609 transitions. [2022-11-18 20:36:37,856 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 609 transitions. Word has length 101 [2022-11-18 20:36:37,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:36:37,856 INFO L495 AbstractCegarLoop]: Abstraction has 488 states and 609 transitions. [2022-11-18 20:36:37,856 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) [2022-11-18 20:36:37,857 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 609 transitions. [2022-11-18 20:36:37,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-18 20:36:37,858 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:36:37,858 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] [2022-11-18 20:36:37,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 20:36:38,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-18 20:36:38,064 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:36:38,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:36:38,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1246855822, now seen corresponding path program 1 times [2022-11-18 20:36:38,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:36:38,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000706752] [2022-11-18 20:36:38,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:36:38,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:36:38,079 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:36:38,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1950748786] [2022-11-18 20:36:38,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:36:38,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:36:38,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:36:38,083 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:36:38,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 20:36:38,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:36:38,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-18 20:36:38,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:36:38,332 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 414 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-18 20:36:38,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:36:38,531 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 42 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-11-18 20:36:38,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:36:38,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000706752] [2022-11-18 20:36:38,532 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:36:38,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950748786] [2022-11-18 20:36:38,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950748786] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:36:38,532 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:36:38,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2022-11-18 20:36:38,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755005027] [2022-11-18 20:36:38,532 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:36:38,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 20:36:38,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:36:38,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 20:36:38,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:36:38,534 INFO L87 Difference]: Start difference. First operand 488 states and 609 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 13 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) [2022-11-18 20:36:39,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:36:39,554 INFO L93 Difference]: Finished difference Result 915 states and 1190 transitions. [2022-11-18 20:36:39,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-18 20:36:39,555 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 13 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) Word has length 104 [2022-11-18 20:36:39,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:36:39,560 INFO L225 Difference]: With dead ends: 915 [2022-11-18 20:36:39,560 INFO L226 Difference]: Without dead ends: 880 [2022-11-18 20:36:39,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=259, Invalid=497, Unknown=0, NotChecked=0, Total=756 [2022-11-18 20:36:39,564 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 348 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:36:39,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 382 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 20:36:39,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2022-11-18 20:36:40,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 867. [2022-11-18 20:36:40,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 579 states have (on average 1.1468048359240068) internal successors, (664), 619 states have internal predecessors, (664), 206 states have call successors, (206), 81 states have call predecessors, (206), 81 states have return successors, (198), 166 states have call predecessors, (198), 198 states have call successors, (198) [2022-11-18 20:36:40,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 1068 transitions. [2022-11-18 20:36:40,124 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 1068 transitions. Word has length 104 [2022-11-18 20:36:40,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:36:40,124 INFO L495 AbstractCegarLoop]: Abstraction has 867 states and 1068 transitions. [2022-11-18 20:36:40,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 13 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) [2022-11-18 20:36:40,125 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 1068 transitions. [2022-11-18 20:36:40,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-18 20:36:40,129 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:36:40,129 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] [2022-11-18 20:36:40,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 20:36:40,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 20:36:40,340 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:36:40,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:36:40,341 INFO L85 PathProgramCache]: Analyzing trace with hash -405037921, now seen corresponding path program 3 times [2022-11-18 20:36:40,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:36:40,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885546493] [2022-11-18 20:36:40,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:36:40,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:36:40,359 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:36:40,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [682938129] [2022-11-18 20:36:40,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:36:40,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:36:40,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:36:40,361 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:36:40,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 20:36:40,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-18 20:36:40,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:36:40,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-18 20:36:40,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:36:40,878 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2022-11-18 20:36:40,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:36:47,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:36:47,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885546493] [2022-11-18 20:36:47,592 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:36:47,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682938129] [2022-11-18 20:36:47,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682938129] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:36:47,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:36:47,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-11-18 20:36:47,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150960688] [2022-11-18 20:36:47,593 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 20:36:47,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 20:36:47,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:36:47,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 20:36:47,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:36:47,595 INFO L87 Difference]: Start difference. First operand 867 states and 1068 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-18 20:36:48,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:36:48,227 INFO L93 Difference]: Finished difference Result 897 states and 1097 transitions. [2022-11-18 20:36:48,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:36:48,227 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 122 [2022-11-18 20:36:48,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:36:48,231 INFO L225 Difference]: With dead ends: 897 [2022-11-18 20:36:48,232 INFO L226 Difference]: Without dead ends: 883 [2022-11-18 20:36:48,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-11-18 20:36:48,233 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 28 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:36:48,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 57 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:36:48,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2022-11-18 20:36:48,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 868. [2022-11-18 20:36:48,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 584 states have (on average 1.1352739726027397) internal successors, (663), 618 states have internal predecessors, (663), 201 states have call successors, (201), 83 states have call predecessors, (201), 82 states have return successors, (198), 166 states have call predecessors, (198), 198 states have call successors, (198) [2022-11-18 20:36:48,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 1062 transitions. [2022-11-18 20:36:48,783 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 1062 transitions. Word has length 122 [2022-11-18 20:36:48,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:36:48,784 INFO L495 AbstractCegarLoop]: Abstraction has 868 states and 1062 transitions. [2022-11-18 20:36:48,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-18 20:36:48,784 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 1062 transitions. [2022-11-18 20:36:48,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-11-18 20:36:48,786 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:36:48,787 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] [2022-11-18 20:36:48,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 20:36:48,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-18 20:36:48,992 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:36:48,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:36:48,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1989463840, now seen corresponding path program 3 times [2022-11-18 20:36:48,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:36:48,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716478689] [2022-11-18 20:36:48,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:36:48,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:36:49,015 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:36:49,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1475930873] [2022-11-18 20:36:49,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:36:49,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:36:49,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:36:49,017 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:36:49,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 20:36:49,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-18 20:36:49,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:36:49,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-18 20:36:49,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:36:49,292 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 163 proven. 56 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2022-11-18 20:36:49,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:36:49,525 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 152 proven. 2 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2022-11-18 20:36:49,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:36:49,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716478689] [2022-11-18 20:36:49,525 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:36:49,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475930873] [2022-11-18 20:36:49,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475930873] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:36:49,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:36:49,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2022-11-18 20:36:49,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884159176] [2022-11-18 20:36:49,526 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:36:49,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 20:36:49,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:36:49,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 20:36:49,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-11-18 20:36:49,528 INFO L87 Difference]: Start difference. First operand 868 states and 1062 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) [2022-11-18 20:36:50,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:36:50,387 INFO L93 Difference]: Finished difference Result 875 states and 1068 transitions. [2022-11-18 20:36:50,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 20:36:50,388 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 [2022-11-18 20:36:50,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:36:50,392 INFO L225 Difference]: With dead ends: 875 [2022-11-18 20:36:50,393 INFO L226 Difference]: Without dead ends: 865 [2022-11-18 20:36:50,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2022-11-18 20:36:50,395 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 93 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:36:50,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 72 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:36:50,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2022-11-18 20:36:50,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 557. [2022-11-18 20:36:50,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 374 states have (on average 1.106951871657754) internal successors, (414), 394 states have internal predecessors, (414), 115 states have call successors, (115), 67 states have call predecessors, (115), 67 states have return successors, (114), 95 states have call predecessors, (114), 114 states have call successors, (114) [2022-11-18 20:36:50,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 643 transitions. [2022-11-18 20:36:50,744 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 643 transitions. Word has length 133 [2022-11-18 20:36:50,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:36:50,744 INFO L495 AbstractCegarLoop]: Abstraction has 557 states and 643 transitions. [2022-11-18 20:36:50,745 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) [2022-11-18 20:36:50,745 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 643 transitions. [2022-11-18 20:36:50,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-11-18 20:36:50,749 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:36:50,749 INFO L195 NwaCegarLoop]: trace histogram [32, 31, 31, 12, 11, 11, 11, 11, 11, 11, 10, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:36:50,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-18 20:36:50,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-18 20:36:50,954 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:36:50,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:36:50,954 INFO L85 PathProgramCache]: Analyzing trace with hash 694795218, now seen corresponding path program 2 times [2022-11-18 20:36:50,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:36:50,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333368247] [2022-11-18 20:36:50,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:36:50,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:36:50,966 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:36:50,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1418587435] [2022-11-18 20:36:50,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:36:50,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:36:50,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:36:50,968 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:36:50,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 20:36:51,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:36:51,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:36:51,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-18 20:36:51,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:36:51,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2292 backedges. 62 proven. 2150 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-18 20:36:51,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:36:51,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2292 backedges. 62 proven. 370 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2022-11-18 20:36:51,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:36:51,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333368247] [2022-11-18 20:36:51,964 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:36:51,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418587435] [2022-11-18 20:36:51,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418587435] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:36:51,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:36:51,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 24 [2022-11-18 20:36:51,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619011346] [2022-11-18 20:36:51,965 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:36:51,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-18 20:36:51,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:36:51,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-18 20:36:51,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-11-18 20:36:51,967 INFO L87 Difference]: Start difference. First operand 557 states and 643 transitions. Second operand has 24 states, 24 states have (on average 5.791666666666667) internal successors, (139), 24 states have internal predecessors, (139), 20 states have call successors, (63), 16 states have call predecessors, (63), 15 states have return successors, (62), 19 states have call predecessors, (62), 19 states have call successors, (62) [2022-11-18 20:36:53,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:36:53,534 INFO L93 Difference]: Finished difference Result 841 states and 1005 transitions. [2022-11-18 20:36:53,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-18 20:36:53,535 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.791666666666667) internal successors, (139), 24 states have internal predecessors, (139), 20 states have call successors, (63), 16 states have call predecessors, (63), 15 states have return successors, (62), 19 states have call predecessors, (62), 19 states have call successors, (62) Word has length 216 [2022-11-18 20:36:53,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:36:53,543 INFO L225 Difference]: With dead ends: 841 [2022-11-18 20:36:53,544 INFO L226 Difference]: Without dead ends: 828 [2022-11-18 20:36:53,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 398 SyntacticMatches, 10 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=552, Invalid=1008, Unknown=0, NotChecked=0, Total=1560 [2022-11-18 20:36:53,545 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 516 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 432 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 432 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:36:53,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [516 Valid, 473 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [432 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-18 20:36:53,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2022-11-18 20:36:54,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 827. [2022-11-18 20:36:54,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 554 states have (on average 1.1155234657039712) internal successors, (618), 586 states have internal predecessors, (618), 175 states have call successors, (175), 97 states have call predecessors, (175), 97 states have return successors, (174), 143 states have call predecessors, (174), 174 states have call successors, (174) [2022-11-18 20:36:54,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 967 transitions. [2022-11-18 20:36:54,086 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 967 transitions. Word has length 216 [2022-11-18 20:36:54,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:36:54,087 INFO L495 AbstractCegarLoop]: Abstraction has 827 states and 967 transitions. [2022-11-18 20:36:54,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.791666666666667) internal successors, (139), 24 states have internal predecessors, (139), 20 states have call successors, (63), 16 states have call predecessors, (63), 15 states have return successors, (62), 19 states have call predecessors, (62), 19 states have call successors, (62) [2022-11-18 20:36:54,088 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 967 transitions. [2022-11-18 20:36:54,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2022-11-18 20:36:54,091 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:36:54,091 INFO L195 NwaCegarLoop]: trace histogram [44, 43, 43, 18, 17, 17, 17, 17, 17, 17, 16, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:36:54,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-18 20:36:54,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-18 20:36:54,297 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:36:54,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:36:54,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1914111846, now seen corresponding path program 3 times [2022-11-18 20:36:54,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:36:54,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560047478] [2022-11-18 20:36:54,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:36:54,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:36:54,312 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:36:54,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [978326360] [2022-11-18 20:36:54,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:36:54,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:36:54,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:36:54,314 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:36:54,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-18 20:36:54,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2022-11-18 20:36:54,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:36:54,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 20:36:54,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:36:55,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4566 backedges. 1546 proven. 0 refuted. 0 times theorem prover too weak. 3020 trivial. 0 not checked. [2022-11-18 20:36:55,035 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:36:55,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:36:55,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560047478] [2022-11-18 20:36:55,035 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:36:55,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978326360] [2022-11-18 20:36:55,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978326360] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:36:55,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:36:55,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 20:36:55,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705160659] [2022-11-18 20:36:55,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:36:55,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:36:55,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:36:55,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:36:55,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:36:55,037 INFO L87 Difference]: Start difference. First operand 827 states and 967 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) [2022-11-18 20:36:55,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:36:55,961 INFO L93 Difference]: Finished difference Result 1321 states and 1591 transitions. [2022-11-18 20:36:55,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:36:55,963 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 300 [2022-11-18 20:36:55,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:36:55,966 INFO L225 Difference]: With dead ends: 1321 [2022-11-18 20:36:55,966 INFO L226 Difference]: Without dead ends: 932 [2022-11-18 20:36:55,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:36:55,968 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 22 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:36:55,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 109 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:36:55,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2022-11-18 20:36:56,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 733. [2022-11-18 20:36:56,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 500 states have (on average 1.092) internal successors, (546), 516 states have internal predecessors, (546), 139 states have call successors, (139), 93 states have call predecessors, (139), 93 states have return successors, (138), 123 states have call predecessors, (138), 138 states have call successors, (138) [2022-11-18 20:36:56,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 823 transitions. [2022-11-18 20:36:56,563 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 823 transitions. Word has length 300 [2022-11-18 20:36:56,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:36:56,563 INFO L495 AbstractCegarLoop]: Abstraction has 733 states and 823 transitions. [2022-11-18 20:36:56,563 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) [2022-11-18 20:36:56,564 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 823 transitions. [2022-11-18 20:36:56,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2022-11-18 20:36:56,567 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:36:56,567 INFO L195 NwaCegarLoop]: trace histogram [45, 44, 44, 17, 16, 16, 16, 16, 16, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:36:56,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-18 20:36:56,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:36:56,774 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:36:56,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:36:56,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1616344757, now seen corresponding path program 1 times [2022-11-18 20:36:56,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:36:56,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008386979] [2022-11-18 20:36:56,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:36:56,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:36:56,796 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:36:56,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2075399088] [2022-11-18 20:36:56,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:36:56,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:36:56,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:36:56,798 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:36:56,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-18 20:36:56,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:36:56,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-18 20:36:57,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:36:57,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4660 backedges. 2247 proven. 69 refuted. 0 times theorem prover too weak. 2344 trivial. 0 not checked. [2022-11-18 20:36:57,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:37:00,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4660 backedges. 375 proven. 69 refuted. 0 times theorem prover too weak. 4216 trivial. 0 not checked. [2022-11-18 20:37:00,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:37:00,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008386979] [2022-11-18 20:37:00,751 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:37:00,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075399088] [2022-11-18 20:37:00,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075399088] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:37:00,751 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:37:00,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2022-11-18 20:37:00,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694088827] [2022-11-18 20:37:00,752 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:37:00,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-18 20:37:00,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:37:00,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-18 20:37:00,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-11-18 20:37:00,754 INFO L87 Difference]: Start difference. First operand 733 states and 823 transitions. Second operand has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 states have internal predecessors, (67), 16 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (42), 16 states have call predecessors, (42), 16 states have call successors, (42) [2022-11-18 20:37:02,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:37:02,457 INFO L93 Difference]: Finished difference Result 1040 states and 1197 transitions. [2022-11-18 20:37:02,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 20:37:02,458 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 states have internal predecessors, (67), 16 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (42), 16 states have call predecessors, (42), 16 states have call successors, (42) Word has length 304 [2022-11-18 20:37:02,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:37:02,461 INFO L225 Difference]: With dead ends: 1040 [2022-11-18 20:37:02,462 INFO L226 Difference]: Without dead ends: 786 [2022-11-18 20:37:02,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 612 GetRequests, 585 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2022-11-18 20:37:02,464 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 58 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:37:02,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 545 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-18 20:37:02,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2022-11-18 20:37:02,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 710. [2022-11-18 20:37:02,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 484 states have (on average 1.0909090909090908) internal successors, (528), 499 states have internal predecessors, (528), 134 states have call successors, (134), 91 states have call predecessors, (134), 91 states have return successors, (133), 119 states have call predecessors, (133), 133 states have call successors, (133) [2022-11-18 20:37:02,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 795 transitions. [2022-11-18 20:37:02,927 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 795 transitions. Word has length 304 [2022-11-18 20:37:02,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:37:02,928 INFO L495 AbstractCegarLoop]: Abstraction has 710 states and 795 transitions. [2022-11-18 20:37:02,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 states have internal predecessors, (67), 16 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (42), 16 states have call predecessors, (42), 16 states have call successors, (42) [2022-11-18 20:37:02,928 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 795 transitions. [2022-11-18 20:37:02,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2022-11-18 20:37:02,932 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:37:02,932 INFO L195 NwaCegarLoop]: trace histogram [46, 45, 45, 16, 15, 15, 15, 15, 15, 15, 15, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:37:02,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-18 20:37:03,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:37:03,139 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:37:03,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:37:03,139 INFO L85 PathProgramCache]: Analyzing trace with hash -839385710, now seen corresponding path program 2 times [2022-11-18 20:37:03,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:37:03,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296022910] [2022-11-18 20:37:03,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:37:03,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:37:03,151 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:37:03,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [712453842] [2022-11-18 20:37:03,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:37:03,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:37:03,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:37:03,156 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:37:03,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af03ce-8300-43d5-b7b0-ec20f5ada198/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-18 20:37:03,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:37:03,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:37:03,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-18 20:37:03,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:37:03,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4770 backedges. 2354 proven. 116 refuted. 0 times theorem prover too weak. 2300 trivial. 0 not checked. [2022-11-18 20:37:03,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:38:58,498 WARN L233 SmtUtils]: Spent 1.09m 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) [2022-11-18 20:39:08,614 WARN L233 SmtUtils]: Spent 9.44s on a formula simplification. DAG size of input: 3152 DAG size of output: 3050 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-18 20:44:40,780 WARN L233 SmtUtils]: Spent 12.22s on a formula simplification. DAG size of input: 3196 DAG size of output: 3095 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)