./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e89b4ab54b22145b4041cfb458aca993f2d791ac86940dcd03d48a90a5273393 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 22:14:53,085 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 22:14:53,086 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 22:14:53,109 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 22:14:53,110 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 22:14:53,111 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 22:14:53,112 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 22:14:53,114 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 22:14:53,115 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 22:14:53,116 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 22:14:53,117 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 22:14:53,118 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 22:14:53,119 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 22:14:53,119 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 22:14:53,121 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 22:14:53,122 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 22:14:53,123 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 22:14:53,123 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 22:14:53,125 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 22:14:53,127 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 22:14:53,128 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 22:14:53,130 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 22:14:53,131 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 22:14:53,131 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 22:14:53,146 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 22:14:53,146 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 22:14:53,147 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 22:14:53,147 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 22:14:53,148 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 22:14:53,149 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 22:14:53,149 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 22:14:53,149 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 22:14:53,150 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 22:14:53,151 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 22:14:53,152 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 22:14:53,152 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 22:14:53,152 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 22:14:53,153 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 22:14:53,153 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 22:14:53,154 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 22:14:53,154 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 22:14:53,155 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 22:14:53,180 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 22:14:53,180 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 22:14:53,180 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 22:14:53,180 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 22:14:53,181 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 22:14:53,181 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 22:14:53,182 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 22:14:53,182 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 22:14:53,182 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 22:14:53,182 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 22:14:53,183 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 22:14:53,183 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 22:14:53,183 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 22:14:53,183 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 22:14:53,183 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 22:14:53,183 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 22:14:53,184 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 22:14:53,184 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 22:14:53,184 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 22:14:53,184 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 22:14:53,184 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 22:14:53,185 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 22:14:53,185 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 22:14:53,185 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 22:14:53,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 22:14:53,185 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 22:14:53,185 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 22:14:53,186 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 22:14:53,186 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 22:14:53,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 22:14:53,186 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 22:14:53,186 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 22:14:53,186 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 22:14:53,187 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 22:14:53,187 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_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e89b4ab54b22145b4041cfb458aca993f2d791ac86940dcd03d48a90a5273393 [2021-12-06 22:14:53,364 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 22:14:53,379 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 22:14:53,380 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 22:14:53,381 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 22:14:53,382 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 22:14:53,383 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound2.c [2021-12-06 22:14:53,425 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/data/1b7733ea4/9b0e9f8750864ee8972c49b8c7571ddd/FLAG638703cac [2021-12-06 22:14:53,800 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 22:14:53,800 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound2.c [2021-12-06 22:14:53,805 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/data/1b7733ea4/9b0e9f8750864ee8972c49b8c7571ddd/FLAG638703cac [2021-12-06 22:14:53,816 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/data/1b7733ea4/9b0e9f8750864ee8972c49b8c7571ddd [2021-12-06 22:14:53,818 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 22:14:53,819 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 22:14:53,820 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 22:14:53,820 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 22:14:53,823 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 22:14:53,824 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:14:53" (1/1) ... [2021-12-06 22:14:53,825 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71562d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:14:53, skipping insertion in model container [2021-12-06 22:14:53,825 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:14:53" (1/1) ... [2021-12-06 22:14:53,830 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 22:14:53,841 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 22:14:53,951 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound2.c[489,502] [2021-12-06 22:14:53,967 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 22:14:53,975 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 22:14:53,984 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound2.c[489,502] [2021-12-06 22:14:53,991 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 22:14:54,001 INFO L208 MainTranslator]: Completed translation [2021-12-06 22:14:54,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:14:54 WrapperNode [2021-12-06 22:14:54,002 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 22:14:54,003 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 22:14:54,003 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 22:14:54,003 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 22:14:54,008 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:14:54" (1/1) ... [2021-12-06 22:14:54,015 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:14:54" (1/1) ... [2021-12-06 22:14:54,034 INFO L137 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 56 [2021-12-06 22:14:54,034 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 22:14:54,035 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 22:14:54,035 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 22:14:54,035 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 22:14:54,043 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:14:54" (1/1) ... [2021-12-06 22:14:54,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:14:54" (1/1) ... [2021-12-06 22:14:54,045 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:14:54" (1/1) ... [2021-12-06 22:14:54,045 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:14:54" (1/1) ... [2021-12-06 22:14:54,049 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:14:54" (1/1) ... [2021-12-06 22:14:54,053 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:14:54" (1/1) ... [2021-12-06 22:14:54,054 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:14:54" (1/1) ... [2021-12-06 22:14:54,056 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 22:14:54,057 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 22:14:54,057 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 22:14:54,057 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 22:14:54,058 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:14:54" (1/1) ... [2021-12-06 22:14:54,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 22:14:54,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:14:54,085 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 22:14:54,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 22:14:54,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 22:14:54,123 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-06 22:14:54,123 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-06 22:14:54,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 22:14:54,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 22:14:54,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 22:14:54,123 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-06 22:14:54,124 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-06 22:14:54,180 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 22:14:54,182 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 22:14:54,266 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 22:14:54,272 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 22:14:54,272 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-06 22:14:54,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:14:54 BoogieIcfgContainer [2021-12-06 22:14:54,274 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 22:14:54,275 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 22:14:54,275 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 22:14:54,278 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 22:14:54,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 10:14:53" (1/3) ... [2021-12-06 22:14:54,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f350398 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:14:54, skipping insertion in model container [2021-12-06 22:14:54,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:14:54" (2/3) ... [2021-12-06 22:14:54,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f350398 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:14:54, skipping insertion in model container [2021-12-06 22:14:54,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:14:54" (3/3) ... [2021-12-06 22:14:54,281 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound2.c [2021-12-06 22:14:54,285 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 22:14:54,286 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 22:14:54,324 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 22:14:54,329 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 22:14:54,330 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 22:14:54,344 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-06 22:14:54,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-06 22:14:54,350 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:14:54,350 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:14:54,351 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:14:54,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:14:54,356 INFO L85 PathProgramCache]: Analyzing trace with hash 516392259, now seen corresponding path program 1 times [2021-12-06 22:14:54,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:14:54,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103868260] [2021-12-06 22:14:54,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:14:54,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:14:54,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:14:54,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:14:54,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:14:54,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:14:54,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:14:54,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 22:14:54,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:14:54,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 22:14:54,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:14:54,529 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-06 22:14:54,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:14:54,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103868260] [2021-12-06 22:14:54,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103868260] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:14:54,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:14:54,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 22:14:54,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351187703] [2021-12-06 22:14:54,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:14:54,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 22:14:54,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:14:54,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 22:14:54,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 22:14:54,568 INFO L87 Difference]: Start difference. First operand has 32 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-06 22:14:54,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:14:54,590 INFO L93 Difference]: Finished difference Result 61 states and 99 transitions. [2021-12-06 22:14:54,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 22:14:54,592 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2021-12-06 22:14:54,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:14:54,600 INFO L225 Difference]: With dead ends: 61 [2021-12-06 22:14:54,601 INFO L226 Difference]: Without dead ends: 28 [2021-12-06 22:14:54,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 22:14:54,608 INFO L933 BasicCegarLoop]: 42 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, 42 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:14:54,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:14:54,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-06 22:14:54,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-12-06 22:14:54,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-06 22:14:54,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2021-12-06 22:14:54,649 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 29 [2021-12-06 22:14:54,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:14:54,650 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2021-12-06 22:14:54,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-06 22:14:54,651 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2021-12-06 22:14:54,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-06 22:14:54,653 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:14:54,653 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:14:54,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 22:14:54,654 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:14:54,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:14:54,654 INFO L85 PathProgramCache]: Analyzing trace with hash 501437177, now seen corresponding path program 1 times [2021-12-06 22:14:54,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:14:54,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179289213] [2021-12-06 22:14:54,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:14:54,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:14:54,678 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 22:14:54,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1731653224] [2021-12-06 22:14:54,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:14:54,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:14:54,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:14:54,680 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:14:54,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 22:14:54,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:14:54,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 22:14:54,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:14:54,846 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-06 22:14:54,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:14:54,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:14:54,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179289213] [2021-12-06 22:14:54,847 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 22:14:54,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731653224] [2021-12-06 22:14:54,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731653224] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:14:54,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:14:54,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 22:14:54,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340612180] [2021-12-06 22:14:54,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:14:54,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 22:14:54,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:14:54,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 22:14:54,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 22:14:54,849 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-06 22:14:54,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:14:54,894 INFO L93 Difference]: Finished difference Result 44 states and 61 transitions. [2021-12-06 22:14:54,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 22:14:54,894 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2021-12-06 22:14:54,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:14:54,896 INFO L225 Difference]: With dead ends: 44 [2021-12-06 22:14:54,896 INFO L226 Difference]: Without dead ends: 42 [2021-12-06 22:14:54,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:14:54,897 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 7 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:14:54,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 139 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:14:54,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-06 22:14:54,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-12-06 22:14:54,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 20 states have (on average 1.25) internal successors, (25), 22 states have internal predecessors, (25), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-06 22:14:54,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 58 transitions. [2021-12-06 22:14:54,908 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 58 transitions. Word has length 29 [2021-12-06 22:14:54,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:14:54,909 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 58 transitions. [2021-12-06 22:14:54,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-06 22:14:54,909 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 58 transitions. [2021-12-06 22:14:54,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-06 22:14:54,910 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:14:54,910 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:14:54,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 22:14:55,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-12-06 22:14:55,112 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:14:55,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:14:55,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1017640517, now seen corresponding path program 1 times [2021-12-06 22:14:55,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:14:55,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950067437] [2021-12-06 22:14:55,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:14:55,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:14:55,166 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 22:14:55,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1293401414] [2021-12-06 22:14:55,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:14:55,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:14:55,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:14:55,170 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:14:55,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 22:14:55,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:14:55,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-06 22:14:55,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:14:55,527 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-06 22:14:55,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:14:55,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:14:55,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950067437] [2021-12-06 22:14:55,528 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 22:14:55,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293401414] [2021-12-06 22:14:55,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293401414] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:14:55,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:14:55,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-06 22:14:55,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328489174] [2021-12-06 22:14:55,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:14:55,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 22:14:55,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:14:55,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 22:14:55,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-12-06 22:14:55,531 INFO L87 Difference]: Start difference. First operand 41 states and 58 transitions. Second operand has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-06 22:14:55,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:14:55,624 INFO L93 Difference]: Finished difference Result 66 states and 98 transitions. [2021-12-06 22:14:55,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 22:14:55,625 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 34 [2021-12-06 22:14:55,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:14:55,627 INFO L225 Difference]: With dead ends: 66 [2021-12-06 22:14:55,628 INFO L226 Difference]: Without dead ends: 64 [2021-12-06 22:14:55,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-12-06 22:14:55,629 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 31 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:14:55,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 206 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:14:55,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-06 22:14:55,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2021-12-06 22:14:55,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 31 states have internal predecessors, (38), 23 states have call successors, (23), 4 states have call predecessors, (23), 4 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-06 22:14:55,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 83 transitions. [2021-12-06 22:14:55,641 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 83 transitions. Word has length 34 [2021-12-06 22:14:55,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:14:55,642 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 83 transitions. [2021-12-06 22:14:55,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-06 22:14:55,642 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 83 transitions. [2021-12-06 22:14:55,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-06 22:14:55,643 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:14:55,643 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:14:55,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-06 22:14:55,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:14:55,845 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:14:55,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:14:55,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1133401081, now seen corresponding path program 1 times [2021-12-06 22:14:55,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:14:55,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269975205] [2021-12-06 22:14:55,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:14:55,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:14:55,868 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 22:14:55,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1881375576] [2021-12-06 22:14:55,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:14:55,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:14:55,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:14:55,870 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:14:55,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 22:14:55,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:14:56,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-06 22:14:56,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:14:56,214 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 22:14:56,214 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:14:56,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:14:56,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269975205] [2021-12-06 22:14:56,215 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 22:14:56,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881375576] [2021-12-06 22:14:56,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881375576] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:14:56,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:14:56,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-06 22:14:56,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845991492] [2021-12-06 22:14:56,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:14:56,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 22:14:56,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:14:56,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 22:14:56,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-12-06 22:14:56,217 INFO L87 Difference]: Start difference. First operand 57 states and 83 transitions. Second operand has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 22:14:56,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:14:56,305 INFO L93 Difference]: Finished difference Result 64 states and 89 transitions. [2021-12-06 22:14:56,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 22:14:56,306 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 39 [2021-12-06 22:14:56,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:14:56,307 INFO L225 Difference]: With dead ends: 64 [2021-12-06 22:14:56,307 INFO L226 Difference]: Without dead ends: 60 [2021-12-06 22:14:56,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-12-06 22:14:56,309 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 20 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:14:56,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 206 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:14:56,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-06 22:14:56,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-12-06 22:14:56,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 32 states have (on average 1.28125) internal successors, (41), 34 states have internal predecessors, (41), 22 states have call successors, (22), 5 states have call predecessors, (22), 5 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-06 22:14:56,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 83 transitions. [2021-12-06 22:14:56,320 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 83 transitions. Word has length 39 [2021-12-06 22:14:56,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:14:56,321 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 83 transitions. [2021-12-06 22:14:56,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 22:14:56,321 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 83 transitions. [2021-12-06 22:14:56,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-06 22:14:56,323 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:14:56,323 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:14:56,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 22:14:56,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:14:56,525 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:14:56,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:14:56,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1954831506, now seen corresponding path program 1 times [2021-12-06 22:14:56,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:14:56,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551055316] [2021-12-06 22:14:56,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:14:56,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:14:56,578 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 22:14:56,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [841151563] [2021-12-06 22:14:56,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:14:56,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:14:56,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:14:56,583 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:14:56,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 22:14:56,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:14:56,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 22:14:56,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:14:56,722 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-06 22:14:56,722 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:14:56,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:14:56,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551055316] [2021-12-06 22:14:56,722 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 22:14:56,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841151563] [2021-12-06 22:14:56,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841151563] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:14:56,723 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:14:56,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 22:14:56,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728945215] [2021-12-06 22:14:56,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:14:56,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 22:14:56,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:14:56,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 22:14:56,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 22:14:56,724 INFO L87 Difference]: Start difference. First operand 60 states and 83 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-06 22:14:56,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:14:56,744 INFO L93 Difference]: Finished difference Result 66 states and 88 transitions. [2021-12-06 22:14:56,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 22:14:56,745 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 45 [2021-12-06 22:14:56,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:14:56,746 INFO L225 Difference]: With dead ends: 66 [2021-12-06 22:14:56,746 INFO L226 Difference]: Without dead ends: 64 [2021-12-06 22:14:56,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:14:56,747 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:14:56,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 131 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:14:56,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-06 22:14:56,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-12-06 22:14:56,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 37 states have internal predecessors, (44), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-06 22:14:56,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 86 transitions. [2021-12-06 22:14:56,755 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 86 transitions. Word has length 45 [2021-12-06 22:14:56,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:14:56,756 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 86 transitions. [2021-12-06 22:14:56,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-06 22:14:56,756 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 86 transitions. [2021-12-06 22:14:56,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-06 22:14:56,757 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:14:56,757 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:14:56,777 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 22:14:56,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:14:56,959 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:14:56,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:14:56,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1265228631, now seen corresponding path program 1 times [2021-12-06 22:14:56,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:14:56,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781310605] [2021-12-06 22:14:56,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:14:56,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:14:56,995 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 22:14:56,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1031591435] [2021-12-06 22:14:56,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:14:56,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:14:56,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:14:56,998 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:14:56,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 22:14:57,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:14:57,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 22:14:57,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:14:57,110 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-06 22:14:57,111 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:14:57,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:14:57,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781310605] [2021-12-06 22:14:57,111 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 22:14:57,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031591435] [2021-12-06 22:14:57,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031591435] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:14:57,111 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:14:57,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 22:14:57,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281738382] [2021-12-06 22:14:57,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:14:57,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 22:14:57,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:14:57,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 22:14:57,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 22:14:57,113 INFO L87 Difference]: Start difference. First operand 64 states and 86 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 22:14:57,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:14:57,144 INFO L93 Difference]: Finished difference Result 80 states and 104 transitions. [2021-12-06 22:14:57,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 22:14:57,145 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2021-12-06 22:14:57,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:14:57,146 INFO L225 Difference]: With dead ends: 80 [2021-12-06 22:14:57,146 INFO L226 Difference]: Without dead ends: 78 [2021-12-06 22:14:57,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:14:57,148 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 6 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:14:57,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 139 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:14:57,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-06 22:14:57,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2021-12-06 22:14:57,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 44 states have internal predecessors, (50), 25 states have call successors, (25), 8 states have call predecessors, (25), 8 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-12-06 22:14:57,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2021-12-06 22:14:57,161 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 47 [2021-12-06 22:14:57,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:14:57,161 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2021-12-06 22:14:57,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 22:14:57,162 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2021-12-06 22:14:57,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-06 22:14:57,163 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:14:57,163 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:14:57,196 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 22:14:57,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-06 22:14:57,364 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:14:57,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:14:57,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1617953190, now seen corresponding path program 1 times [2021-12-06 22:14:57,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:14:57,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899320664] [2021-12-06 22:14:57,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:14:57,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:14:57,391 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 22:14:57,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1613012787] [2021-12-06 22:14:57,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:14:57,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:14:57,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:14:57,394 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:14:57,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 22:14:57,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:14:57,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 22:14:57,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:14:57,501 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-06 22:14:57,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:14:57,598 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-06 22:14:57,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:14:57,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899320664] [2021-12-06 22:14:57,599 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 22:14:57,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613012787] [2021-12-06 22:14:57,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613012787] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:14:57,599 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:14:57,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-12-06 22:14:57,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829329918] [2021-12-06 22:14:57,599 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 22:14:57,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 22:14:57,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:14:57,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 22:14:57,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-06 22:14:57,601 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-06 22:14:57,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:14:57,684 INFO L93 Difference]: Finished difference Result 84 states and 108 transitions. [2021-12-06 22:14:57,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 22:14:57,685 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 50 [2021-12-06 22:14:57,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:14:57,686 INFO L225 Difference]: With dead ends: 84 [2021-12-06 22:14:57,686 INFO L226 Difference]: Without dead ends: 80 [2021-12-06 22:14:57,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-12-06 22:14:57,687 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 13 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:14:57,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 151 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:14:57,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-06 22:14:57,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-12-06 22:14:57,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 48 states have internal predecessors, (52), 25 states have call successors, (25), 9 states have call predecessors, (25), 9 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2021-12-06 22:14:57,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 101 transitions. [2021-12-06 22:14:57,698 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 101 transitions. Word has length 50 [2021-12-06 22:14:57,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:14:57,698 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 101 transitions. [2021-12-06 22:14:57,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-06 22:14:57,698 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 101 transitions. [2021-12-06 22:14:57,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-06 22:14:57,699 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:14:57,699 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:14:57,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 22:14:57,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:14:57,901 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:14:57,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:14:57,903 INFO L85 PathProgramCache]: Analyzing trace with hash 860577929, now seen corresponding path program 1 times [2021-12-06 22:14:57,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:14:57,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451774634] [2021-12-06 22:14:57,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:14:57,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:14:57,935 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 22:14:57,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1571805598] [2021-12-06 22:14:57,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:14:57,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:14:57,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:14:57,938 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:14:57,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 22:14:57,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:14:57,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-06 22:14:57,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:14:58,211 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-06 22:14:58,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:14:58,411 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-06 22:14:58,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:14:58,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451774634] [2021-12-06 22:14:58,412 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 22:14:58,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571805598] [2021-12-06 22:14:58,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571805598] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:14:58,412 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:14:58,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2021-12-06 22:14:58,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194895760] [2021-12-06 22:14:58,413 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 22:14:58,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 22:14:58,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:14:58,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 22:14:58,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-12-06 22:14:58,414 INFO L87 Difference]: Start difference. First operand 80 states and 101 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 14 states have internal predecessors, (31), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2021-12-06 22:14:58,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:14:58,951 INFO L93 Difference]: Finished difference Result 115 states and 149 transitions. [2021-12-06 22:14:58,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 22:14:58,951 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 14 states have internal predecessors, (31), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) Word has length 52 [2021-12-06 22:14:58,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:14:58,953 INFO L225 Difference]: With dead ends: 115 [2021-12-06 22:14:58,953 INFO L226 Difference]: Without dead ends: 113 [2021-12-06 22:14:58,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-12-06 22:14:58,954 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 48 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 22:14:58,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 175 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 22:14:58,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-12-06 22:14:58,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2021-12-06 22:14:58,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 57 states have internal predecessors, (61), 25 states have call successors, (25), 12 states have call predecessors, (25), 12 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2021-12-06 22:14:58,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 110 transitions. [2021-12-06 22:14:58,973 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 110 transitions. Word has length 52 [2021-12-06 22:14:58,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:14:58,973 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 110 transitions. [2021-12-06 22:14:58,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 14 states have internal predecessors, (31), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2021-12-06 22:14:58,973 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 110 transitions. [2021-12-06 22:14:58,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-06 22:14:58,975 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:14:58,975 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:14:58,997 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 22:14:59,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:14:59,177 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:14:59,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:14:59,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1226126935, now seen corresponding path program 2 times [2021-12-06 22:14:59,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:14:59,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945162192] [2021-12-06 22:14:59,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:14:59,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:14:59,210 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 22:14:59,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [499270680] [2021-12-06 22:14:59,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:14:59,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:14:59,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:14:59,213 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:14:59,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 22:14:59,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:14:59,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:14:59,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-06 22:14:59,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:14:59,372 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-06 22:14:59,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:14:59,449 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-06 22:14:59,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:14:59,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945162192] [2021-12-06 22:14:59,449 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 22:14:59,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499270680] [2021-12-06 22:14:59,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499270680] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:14:59,450 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:14:59,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-12-06 22:14:59,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028739708] [2021-12-06 22:14:59,450 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 22:14:59,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 22:14:59,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:14:59,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 22:14:59,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:14:59,451 INFO L87 Difference]: Start difference. First operand 92 states and 110 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-12-06 22:15:00,857 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 22:15:00,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:15:00,917 INFO L93 Difference]: Finished difference Result 117 states and 150 transitions. [2021-12-06 22:15:00,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 22:15:00,918 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 57 [2021-12-06 22:15:00,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:15:00,919 INFO L225 Difference]: With dead ends: 117 [2021-12-06 22:15:00,919 INFO L226 Difference]: Without dead ends: 107 [2021-12-06 22:15:00,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-12-06 22:15:00,920 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 11 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 22:15:00,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 202 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-06 22:15:00,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-06 22:15:00,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 92. [2021-12-06 22:15:00,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 57 states have (on average 1.105263157894737) internal successors, (63), 59 states have internal predecessors, (63), 21 states have call successors, (21), 13 states have call predecessors, (21), 13 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-06 22:15:00,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 104 transitions. [2021-12-06 22:15:00,930 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 104 transitions. Word has length 57 [2021-12-06 22:15:00,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:15:00,930 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 104 transitions. [2021-12-06 22:15:00,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-12-06 22:15:00,931 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 104 transitions. [2021-12-06 22:15:00,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 22:15:00,931 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:15:00,932 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:15:00,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 22:15:01,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-06 22:15:01,132 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:15:01,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:15:01,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1236716699, now seen corresponding path program 1 times [2021-12-06 22:15:01,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:15:01,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374753333] [2021-12-06 22:15:01,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:15:01,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:15:01,142 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 22:15:01,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1454286755] [2021-12-06 22:15:01,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:15:01,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:15:01,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:15:01,143 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:15:01,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 22:15:01,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:15:01,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 22:15:01,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:15:01,283 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-06 22:15:01,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:15:01,394 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-06 22:15:01,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:15:01,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374753333] [2021-12-06 22:15:01,394 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 22:15:01,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454286755] [2021-12-06 22:15:01,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454286755] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:15:01,394 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:15:01,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-12-06 22:15:01,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065839438] [2021-12-06 22:15:01,395 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 22:15:01,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 22:15:01,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:15:01,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 22:15:01,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-06 22:15:01,396 INFO L87 Difference]: Start difference. First operand 92 states and 104 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2021-12-06 22:15:01,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:15:01,471 INFO L93 Difference]: Finished difference Result 123 states and 137 transitions. [2021-12-06 22:15:01,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 22:15:01,471 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) Word has length 65 [2021-12-06 22:15:01,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:15:01,472 INFO L225 Difference]: With dead ends: 123 [2021-12-06 22:15:01,472 INFO L226 Difference]: Without dead ends: 71 [2021-12-06 22:15:01,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-12-06 22:15:01,473 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 14 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:15:01,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 199 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:15:01,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-12-06 22:15:01,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-12-06 22:15:01,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 45 states have internal predecessors, (47), 16 states have call successors, (16), 10 states have call predecessors, (16), 10 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-06 22:15:01,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2021-12-06 22:15:01,483 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 65 [2021-12-06 22:15:01,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:15:01,483 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2021-12-06 22:15:01,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2021-12-06 22:15:01,484 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2021-12-06 22:15:01,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 22:15:01,485 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:15:01,485 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:15:01,505 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 22:15:01,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 22:15:01,686 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:15:01,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:15:01,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1045444891, now seen corresponding path program 2 times [2021-12-06 22:15:01,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:15:01,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635567077] [2021-12-06 22:15:01,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:15:01,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:15:01,699 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 22:15:01,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [325614395] [2021-12-06 22:15:01,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:15:01,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:15:01,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:15:01,701 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:15:01,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 22:15:01,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:15:01,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:15:01,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 22:15:01,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:15:01,821 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 19 proven. 12 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-06 22:15:01,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:15:01,927 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 19 proven. 12 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-06 22:15:01,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:15:01,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635567077] [2021-12-06 22:15:01,927 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 22:15:01,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325614395] [2021-12-06 22:15:01,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325614395] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:15:01,928 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:15:01,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-12-06 22:15:01,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746809531] [2021-12-06 22:15:01,928 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 22:15:01,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 22:15:01,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:15:01,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 22:15:01,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-12-06 22:15:01,929 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 10 states have internal predecessors, (31), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-12-06 22:15:02,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:15:02,010 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2021-12-06 22:15:02,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 22:15:02,011 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 10 states have internal predecessors, (31), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 65 [2021-12-06 22:15:02,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:15:02,011 INFO L225 Difference]: With dead ends: 75 [2021-12-06 22:15:02,011 INFO L226 Difference]: Without dead ends: 0 [2021-12-06 22:15:02,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-12-06 22:15:02,012 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 10 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:15:02,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 151 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:15:02,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-06 22:15:02,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-06 22:15:02,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:15:02,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-06 22:15:02,013 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 65 [2021-12-06 22:15:02,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:15:02,013 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-06 22:15:02,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 10 states have internal predecessors, (31), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-12-06 22:15:02,014 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-06 22:15:02,014 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-06 22:15:02,015 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-06 22:15:02,035 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 22:15:02,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-06 22:15:02,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-06 22:15:04,318 INFO L854 garLoopResultBuilder]: At program point L35-2(lines 35 52) the Hoare annotation is: (let ((.cse5 (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|)))) (let ((.cse0 (= |ULTIMATE.start_main_~p~0#1| 1)) (.cse1 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse2 (= |ULTIMATE.start_main_~b~0#1| .cse5)) (.cse3 (= |ULTIMATE.start_main_~a~0#1| .cse5)) (.cse4 (= |ULTIMATE.start_main_~s~0#1| 1))) (or (and .cse0 (<= 1 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start_main_~q~0#1| 0) .cse1 .cse2 (<= |ULTIMATE.start_main_~x~0#1| 2) .cse3 .cse4) (and .cse0 (<= |ULTIMATE.start_main_~y~0#1| 2) (= (+ |ULTIMATE.start_main_~q~0#1| 1) 0) (= |ULTIMATE.start_main_~r~0#1| 0) .cse1 .cse2 .cse3 (= |ULTIMATE.start_main_~y~0#1| (+ |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~x~0#1|)) .cse4)))) [2021-12-06 22:15:04,318 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-12-06 22:15:04,318 INFO L861 garLoopResultBuilder]: At program point L58(lines 18 59) the Hoare annotation is: true [2021-12-06 22:15:04,319 INFO L854 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: (and (<= |ULTIMATE.start_main_~y~0#1| 2) (<= 0 |ULTIMATE.start_main_~y~0#1|) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2)) [2021-12-06 22:15:04,319 INFO L854 garLoopResultBuilder]: At program point L56(line 56) the Hoare annotation is: (let ((.cse0 (<= |ULTIMATE.start_main_~y~0#1| 2)) (.cse1 (<= 1 |ULTIMATE.start_main_~y~0#1|)) (.cse2 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse3 (<= |ULTIMATE.start_main_~x~0#1| 2))) (or (and .cse0 .cse1 (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start_main_~q~0#1| 0) .cse2 .cse3 (= |ULTIMATE.start_main_~s~0#1| 1)) (let ((.cse4 (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|)))) (and .cse0 .cse1 (= |ULTIMATE.start_main_~b~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|))) .cse2 (= |ULTIMATE.start_main_~b~0#1| .cse4) .cse3 (= |ULTIMATE.start_main_~a~0#1| .cse4))))) [2021-12-06 22:15:04,319 INFO L854 garLoopResultBuilder]: At program point L54(line 54) the Hoare annotation is: (let ((.cse5 (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|)))) (let ((.cse0 (= |ULTIMATE.start_main_~p~0#1| 1)) (.cse1 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse2 (= |ULTIMATE.start_main_~b~0#1| .cse5)) (.cse3 (= |ULTIMATE.start_main_~a~0#1| .cse5)) (.cse4 (= |ULTIMATE.start_main_~s~0#1| 1))) (or (and .cse0 (<= 1 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start_main_~q~0#1| 0) .cse1 .cse2 (<= |ULTIMATE.start_main_~x~0#1| 2) .cse3 .cse4) (and .cse0 (<= |ULTIMATE.start_main_~y~0#1| 2) (= (+ |ULTIMATE.start_main_~q~0#1| 1) 0) (= |ULTIMATE.start_main_~r~0#1| 0) .cse1 .cse2 .cse3 (= |ULTIMATE.start_main_~y~0#1| (+ |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~x~0#1|)) .cse4)))) [2021-12-06 22:15:04,319 INFO L858 garLoopResultBuilder]: For program point L38(lines 35 52) no Hoare annotation was computed. [2021-12-06 22:15:04,319 INFO L854 garLoopResultBuilder]: At program point L36(line 36) the Hoare annotation is: (let ((.cse1 (= |ULTIMATE.start_main_~r~0#1| 0)) (.cse3 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|)) (.cse0 (<= 1 |ULTIMATE.start_main_~y~0#1|)) (.cse6 (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|)) (.cse7 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse2 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse8 (<= |ULTIMATE.start_main_~x~0#1| 2)) (.cse4 (= |ULTIMATE.start_main_~a~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|)))) (.cse5 (= |ULTIMATE.start_main_~s~0#1| 1))) (or (and (< 0 |ULTIMATE.start_main_~b~0#1|) (<= |ULTIMATE.start_main_~y~0#1| 2) .cse0 (= |ULTIMATE.start_main_~b~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|))) .cse1 .cse2 .cse3 (< |ULTIMATE.start_main_~a~0#1| 2) .cse4 .cse5) (and .cse0 .cse6 (<= |ULTIMATE.start_main_~b~0#1| 2) .cse1 .cse7 .cse2 .cse3 .cse8 .cse4 .cse5) (and (= |ULTIMATE.start_main_~p~0#1| 1) .cse0 (< |ULTIMATE.start_main_~b~0#1| 2) .cse6 .cse7 (< 0 |ULTIMATE.start_main_~a~0#1|) .cse2 .cse8 .cse4 .cse5))) [2021-12-06 22:15:04,319 INFO L854 garLoopResultBuilder]: At program point L36-1(line 36) the Hoare annotation is: (let ((.cse1 (= |ULTIMATE.start_main_~r~0#1| 0)) (.cse3 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|)) (.cse0 (<= 1 |ULTIMATE.start_main_~y~0#1|)) (.cse6 (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|)) (.cse7 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse2 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse8 (<= |ULTIMATE.start_main_~x~0#1| 2)) (.cse4 (= |ULTIMATE.start_main_~a~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|)))) (.cse5 (= |ULTIMATE.start_main_~s~0#1| 1))) (or (and (< 0 |ULTIMATE.start_main_~b~0#1|) (<= |ULTIMATE.start_main_~y~0#1| 2) .cse0 (= |ULTIMATE.start_main_~b~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|))) .cse1 .cse2 .cse3 (< |ULTIMATE.start_main_~a~0#1| 2) .cse4 .cse5) (and .cse0 .cse6 (<= |ULTIMATE.start_main_~b~0#1| 2) .cse1 .cse7 .cse2 .cse3 .cse8 .cse4 .cse5) (and (= |ULTIMATE.start_main_~p~0#1| 1) .cse0 (< |ULTIMATE.start_main_~b~0#1| 2) .cse6 .cse7 (< 0 |ULTIMATE.start_main_~a~0#1|) .cse2 .cse8 .cse4 .cse5))) [2021-12-06 22:15:04,319 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-12-06 22:15:04,319 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-12-06 22:15:04,319 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-12-06 22:15:04,319 INFO L858 garLoopResultBuilder]: For program point L26(line 26) no Hoare annotation was computed. [2021-12-06 22:15:04,319 INFO L858 garLoopResultBuilder]: For program point L57(line 57) no Hoare annotation was computed. [2021-12-06 22:15:04,320 INFO L854 garLoopResultBuilder]: At program point L24(line 24) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2)) [2021-12-06 22:15:04,320 INFO L854 garLoopResultBuilder]: At program point L24-1(line 24) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~y~0#1| 2) (<= 0 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2)) [2021-12-06 22:15:04,320 INFO L854 garLoopResultBuilder]: At program point L55(line 55) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~p~0#1| 1)) (.cse1 (<= |ULTIMATE.start_main_~y~0#1| 2)) (.cse2 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse3 (= |ULTIMATE.start_main_~s~0#1| 1))) (or (and .cse0 .cse1 (<= 1 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start_main_~q~0#1| 0) .cse2 (<= |ULTIMATE.start_main_~x~0#1| 2) .cse3) (let ((.cse4 (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|)))) (and .cse0 .cse1 (= (+ |ULTIMATE.start_main_~q~0#1| 1) 0) (= |ULTIMATE.start_main_~r~0#1| 0) .cse2 (= |ULTIMATE.start_main_~b~0#1| .cse4) (= |ULTIMATE.start_main_~a~0#1| .cse4) (= |ULTIMATE.start_main_~y~0#1| (+ |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~x~0#1|)) .cse3)))) [2021-12-06 22:15:04,320 INFO L861 garLoopResultBuilder]: At program point L22(line 22) the Hoare annotation is: true [2021-12-06 22:15:04,320 INFO L858 garLoopResultBuilder]: For program point L22-1(line 22) no Hoare annotation was computed. [2021-12-06 22:15:04,320 INFO L858 garLoopResultBuilder]: For program point L43(lines 43 51) no Hoare annotation was computed. [2021-12-06 22:15:04,320 INFO L854 garLoopResultBuilder]: At program point L43-2(lines 35 52) the Hoare annotation is: (let ((.cse1 (= |ULTIMATE.start_main_~r~0#1| 0)) (.cse3 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|)) (.cse0 (<= 1 |ULTIMATE.start_main_~y~0#1|)) (.cse6 (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|)) (.cse7 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse2 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse8 (<= |ULTIMATE.start_main_~x~0#1| 2)) (.cse4 (= |ULTIMATE.start_main_~a~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|)))) (.cse5 (= |ULTIMATE.start_main_~s~0#1| 1))) (or (and (< 0 |ULTIMATE.start_main_~b~0#1|) (<= |ULTIMATE.start_main_~y~0#1| 2) .cse0 (= |ULTIMATE.start_main_~b~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|))) .cse1 .cse2 .cse3 (< |ULTIMATE.start_main_~a~0#1| 2) .cse4 .cse5) (and .cse0 .cse6 (<= |ULTIMATE.start_main_~b~0#1| 2) .cse1 .cse7 .cse2 .cse3 .cse8 .cse4 .cse5) (and (= |ULTIMATE.start_main_~p~0#1| 1) .cse0 (< |ULTIMATE.start_main_~b~0#1| 2) .cse6 .cse7 (< 0 |ULTIMATE.start_main_~a~0#1|) .cse2 .cse8 .cse4 .cse5))) [2021-12-06 22:15:04,320 INFO L854 garLoopResultBuilder]: At program point L37(line 37) the Hoare annotation is: (let ((.cse2 (= |ULTIMATE.start_main_~r~0#1| 0)) (.cse4 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|)) (.cse0 (<= 1 |ULTIMATE.start_main_~y~0#1|)) (.cse1 (= |ULTIMATE.start_main_~b~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|)))) (.cse7 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse3 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse8 (<= |ULTIMATE.start_main_~x~0#1| 2)) (.cse5 (= |ULTIMATE.start_main_~a~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|)))) (.cse6 (= |ULTIMATE.start_main_~s~0#1| 1))) (or (and (< 0 |ULTIMATE.start_main_~b~0#1|) (<= |ULTIMATE.start_main_~y~0#1| 2) .cse0 .cse1 .cse2 .cse3 .cse4 (< |ULTIMATE.start_main_~a~0#1| 2) .cse5 .cse6) (and .cse0 (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~b~0#1| 2) .cse2 .cse7 .cse3 .cse4 .cse8 .cse5 .cse6) (and (= |ULTIMATE.start_main_~p~0#1| 1) .cse0 (< |ULTIMATE.start_main_~b~0#1| 2) .cse1 .cse7 (< 0 |ULTIMATE.start_main_~a~0#1|) .cse3 .cse8 .cse5 .cse6))) [2021-12-06 22:15:04,320 INFO L861 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2021-12-06 22:15:04,320 INFO L858 garLoopResultBuilder]: For program point L8(line 8) no Hoare annotation was computed. [2021-12-06 22:15:04,320 INFO L858 garLoopResultBuilder]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2021-12-06 22:15:04,320 INFO L858 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2021-12-06 22:15:04,321 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 10 16) the Hoare annotation is: true [2021-12-06 22:15:04,321 INFO L858 garLoopResultBuilder]: For program point L12(lines 12 13) no Hoare annotation was computed. [2021-12-06 22:15:04,321 INFO L858 garLoopResultBuilder]: For program point L11(lines 11 14) no Hoare annotation was computed. [2021-12-06 22:15:04,321 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 10 16) no Hoare annotation was computed. [2021-12-06 22:15:04,321 INFO L858 garLoopResultBuilder]: For program point L11-2(lines 10 16) no Hoare annotation was computed. [2021-12-06 22:15:04,321 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-12-06 22:15:04,323 INFO L732 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:15:04,324 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-06 22:15:04,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.12 10:15:04 BoogieIcfgContainer [2021-12-06 22:15:04,335 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-06 22:15:04,335 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-06 22:15:04,335 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-06 22:15:04,335 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-06 22:15:04,336 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:14:54" (3/4) ... [2021-12-06 22:15:04,338 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-06 22:15:04,342 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2021-12-06 22:15:04,342 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-12-06 22:15:04,345 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-12-06 22:15:04,345 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-12-06 22:15:04,345 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-06 22:15:04,346 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-06 22:15:04,369 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/witness.graphml [2021-12-06 22:15:04,369 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-06 22:15:04,370 INFO L158 Benchmark]: Toolchain (without parser) took 10550.54ms. Allocated memory was 125.8MB in the beginning and 151.0MB in the end (delta: 25.2MB). Free memory was 100.9MB in the beginning and 85.0MB in the end (delta: 15.8MB). Peak memory consumption was 41.4MB. Max. memory is 16.1GB. [2021-12-06 22:15:04,370 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 83.9MB. Free memory is still 53.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 22:15:04,370 INFO L158 Benchmark]: CACSL2BoogieTranslator took 181.93ms. Allocated memory is still 125.8MB. Free memory was 100.5MB in the beginning and 90.4MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-06 22:15:04,370 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.81ms. Allocated memory is still 125.8MB. Free memory was 90.0MB in the beginning and 88.7MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 22:15:04,371 INFO L158 Benchmark]: Boogie Preprocessor took 20.98ms. Allocated memory is still 125.8MB. Free memory was 88.7MB in the beginning and 87.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 22:15:04,371 INFO L158 Benchmark]: RCFGBuilder took 217.12ms. Allocated memory is still 125.8MB. Free memory was 87.4MB in the beginning and 77.0MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-06 22:15:04,371 INFO L158 Benchmark]: TraceAbstraction took 10059.61ms. Allocated memory was 125.8MB in the beginning and 151.0MB in the end (delta: 25.2MB). Free memory was 76.5MB in the beginning and 88.2MB in the end (delta: -11.6MB). Peak memory consumption was 64.7MB. Max. memory is 16.1GB. [2021-12-06 22:15:04,371 INFO L158 Benchmark]: Witness Printer took 34.08ms. Allocated memory is still 151.0MB. Free memory was 88.2MB in the beginning and 85.0MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 22:15:04,373 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 83.9MB. Free memory is still 53.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 181.93ms. Allocated memory is still 125.8MB. Free memory was 100.5MB in the beginning and 90.4MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.81ms. Allocated memory is still 125.8MB. Free memory was 90.0MB in the beginning and 88.7MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 20.98ms. Allocated memory is still 125.8MB. Free memory was 88.7MB in the beginning and 87.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 217.12ms. Allocated memory is still 125.8MB. Free memory was 87.4MB in the beginning and 77.0MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 10059.61ms. Allocated memory was 125.8MB in the beginning and 151.0MB in the end (delta: 25.2MB). Free memory was 76.5MB in the beginning and 88.2MB in the end (delta: -11.6MB). Peak memory consumption was 64.7MB. Max. memory is 16.1GB. * Witness Printer took 34.08ms. Allocated memory is still 151.0MB. Free memory was 88.2MB in the beginning and 85.0MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 10.0s, OverallIterations: 11, TraceHistogramMax: 7, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 208 SdHoareTripleChecker+Valid, 2.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 165 mSDsluCounter, 1741 SdHoareTripleChecker+Invalid, 2.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1366 mSDsCounter, 199 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1044 IncrementalHoareTripleChecker+Invalid, 1243 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 199 mSolverCounterUnsat, 375 mSDtfsCounter, 1044 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 796 GetRequests, 687 SyntacticMatches, 6 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=92occurred in iteration=8, InterpolantAutomatonStates: 87, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 47 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 15 LocationsWithAnnotation, 62 PreInvPairs, 90 NumberOfFragments, 818 HoareAnnotationTreeSize, 62 FomulaSimplifications, 243 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 15 FomulaSimplificationsInter, 2926 FormulaSimplificationTreeSizeReductionInter, 2.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 512 NumberOfCodeBlocks, 512 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 785 ConstructedInterpolants, 0 QuantifiedInterpolants, 2368 SizeOfPredicates, 36 NumberOfNonLiveVariables, 1263 ConjunctsInSsa, 173 ConjunctsInUnsatCore, 16 InterpolantComputations, 6 PerfectInterpolantSequences, 909/1002 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: ((((((((((0 < b && y <= 2) && 1 <= y) && b == x * q + y * s) && r == 0) && 1 <= x) && a == x) && a < 2) && a == x * p + y * r) && s == 1) || (((((((((1 <= y && b == y) && b <= 2) && r == 0) && q == 0) && 1 <= x) && a == x) && x <= 2) && a == x * p + y * r) && s == 1)) || (((((((((p == 1 && 1 <= y) && b < 2) && b == y) && q == 0) && 0 < a) && 1 <= x) && x <= 2) && a == x * p + y * r) && s == 1) - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-12-06 22:15:04,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa009b08-df00-4ca9-a1cf-c53feec262cc/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE