./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF --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 e587d407128aaafd417211e5ccf66790913a0bc1afeba03ae0cdb578f5831614 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:39:06,066 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:39:06,068 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:39:06,099 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:39:06,099 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:39:06,101 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:39:06,102 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:39:06,105 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:39:06,107 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:39:06,108 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:39:06,109 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:39:06,110 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:39:06,111 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:39:06,112 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:39:06,113 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:39:06,115 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:39:06,116 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:39:06,117 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:39:06,119 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:39:06,122 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:39:06,123 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:39:06,125 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:39:06,126 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:39:06,127 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:39:06,131 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:39:06,132 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:39:06,132 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:39:06,133 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:39:06,134 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:39:06,137 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:39:06,143 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:39:06,144 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:39:06,145 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:39:06,146 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:39:06,148 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:39:06,148 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:39:06,149 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:39:06,150 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:39:06,151 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:39:06,152 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:39:06,153 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:39:06,154 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:39:06,191 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:39:06,191 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:39:06,191 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:39:06,191 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:39:06,192 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:39:06,192 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:39:06,193 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:39:06,193 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:39:06,194 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:39:06,194 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:39:06,194 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:39:06,194 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:39:06,195 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:39:06,195 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:39:06,195 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:39:06,195 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:39:06,195 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:39:06,196 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:39:06,196 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:39:06,196 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:39:06,196 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:39:06,197 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:39:06,197 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:39:06,197 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:39:06,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:39:06,198 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:39:06,198 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:39:06,198 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:39:06,198 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:39:06,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:39:06,199 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:39:06,199 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:39:06,199 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:39:06,199 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:39:06,200 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_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e587d407128aaafd417211e5ccf66790913a0bc1afeba03ae0cdb578f5831614 [2021-11-20 06:39:06,459 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:39:06,480 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:39:06,482 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:39:06,483 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:39:06,484 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:39:06,485 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.c [2021-11-20 06:39:06,556 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/data/9a6aaf2c9/1459813615184bf0bf3e0e8b5f1e4f2e/FLAG55ac14335 [2021-11-20 06:39:06,958 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:39:06,959 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.c [2021-11-20 06:39:06,965 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/data/9a6aaf2c9/1459813615184bf0bf3e0e8b5f1e4f2e/FLAG55ac14335 [2021-11-20 06:39:07,347 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/data/9a6aaf2c9/1459813615184bf0bf3e0e8b5f1e4f2e [2021-11-20 06:39:07,350 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:39:07,352 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:39:07,354 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:39:07,354 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:39:07,358 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:39:07,359 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:39:07" (1/1) ... [2021-11-20 06:39:07,360 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@632a6bbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:39:07, skipping insertion in model container [2021-11-20 06:39:07,361 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:39:07" (1/1) ... [2021-11-20 06:39:07,369 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:39:07,388 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:39:07,604 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_cbd7cbde-886a-4aa4-b263-e73cf71f216e/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.c[490,503] [2021-11-20 06:39:07,628 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:39:07,638 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:39:07,652 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_cbd7cbde-886a-4aa4-b263-e73cf71f216e/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.c[490,503] [2021-11-20 06:39:07,665 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:39:07,680 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:39:07,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:39:07 WrapperNode [2021-11-20 06:39:07,681 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:39:07,682 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:39:07,682 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:39:07,683 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:39:07,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:39:07" (1/1) ... [2021-11-20 06:39:07,699 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:39:07" (1/1) ... [2021-11-20 06:39:07,721 INFO L137 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2021-11-20 06:39:07,721 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:39:07,722 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:39:07,722 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:39:07,722 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:39:07,731 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:39:07" (1/1) ... [2021-11-20 06:39:07,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:39:07" (1/1) ... [2021-11-20 06:39:07,733 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:39:07" (1/1) ... [2021-11-20 06:39:07,733 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:39:07" (1/1) ... [2021-11-20 06:39:07,737 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:39:07" (1/1) ... [2021-11-20 06:39:07,742 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:39:07" (1/1) ... [2021-11-20 06:39:07,743 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:39:07" (1/1) ... [2021-11-20 06:39:07,745 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:39:07,754 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:39:07,754 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:39:07,755 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:39:07,755 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:39:07" (1/1) ... [2021-11-20 06:39:07,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:39:07,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:39:07,787 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:39:07,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:39:07,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:39:07,832 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 06:39:07,832 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 06:39:07,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:39:07,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:39:07,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:39:07,833 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 06:39:07,833 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 06:39:07,899 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:39:07,901 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:39:08,119 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:39:08,126 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:39:08,126 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-20 06:39:08,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:39:08 BoogieIcfgContainer [2021-11-20 06:39:08,128 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:39:08,130 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:39:08,131 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:39:08,134 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:39:08,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:39:07" (1/3) ... [2021-11-20 06:39:08,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26628e87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:39:08, skipping insertion in model container [2021-11-20 06:39:08,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:39:07" (2/3) ... [2021-11-20 06:39:08,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26628e87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:39:08, skipping insertion in model container [2021-11-20 06:39:08,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:39:08" (3/3) ... [2021-11-20 06:39:08,138 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound20.c [2021-11-20 06:39:08,143 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:39:08,143 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:39:08,191 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:39:08,198 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 06:39:08,199 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:39:08,216 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-20 06:39:08,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-20 06:39:08,222 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:39:08,223 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:39:08,224 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:39:08,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:39:08,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1146169762, now seen corresponding path program 1 times [2021-11-20 06:39:08,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:39:08,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674239487] [2021-11-20 06:39:08,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:39:08,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:39:08,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:08,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:39:08,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:08,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:39:08,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:08,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:39:08,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:08,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:39:08,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:08,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-20 06:39:08,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:08,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-20 06:39:08,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:08,437 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-20 06:39:08,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:39:08,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674239487] [2021-11-20 06:39:08,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674239487] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:39:08,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:39:08,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:39:08,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714032480] [2021-11-20 06:39:08,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:39:08,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 06:39:08,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:39:08,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 06:39:08,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:39:08,477 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 06:39:08,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:39:08,528 INFO L93 Difference]: Finished difference Result 67 states and 112 transitions. [2021-11-20 06:39:08,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 06:39:08,543 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2021-11-20 06:39:08,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:39:08,550 INFO L225 Difference]: With dead ends: 67 [2021-11-20 06:39:08,551 INFO L226 Difference]: Without dead ends: 31 [2021-11-20 06:39:08,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:39:08,573 INFO L933 BasicCegarLoop]: 46 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, 46 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:39:08,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:39:08,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-20 06:39:08,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-20 06:39:08,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-20 06:39:08,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-11-20 06:39:08,620 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 39 [2021-11-20 06:39:08,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:39:08,620 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-11-20 06:39:08,621 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 06:39:08,621 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-11-20 06:39:08,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-20 06:39:08,623 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:39:08,623 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:39:08,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:39:08,624 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:39:08,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:39:08,625 INFO L85 PathProgramCache]: Analyzing trace with hash 846808023, now seen corresponding path program 1 times [2021-11-20 06:39:08,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:39:08,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343191346] [2021-11-20 06:39:08,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:39:08,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:39:08,648 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:39:08,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [156850083] [2021-11-20 06:39:08,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:39:08,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:39:08,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:39:08,651 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:39:08,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:39:08,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:08,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:39:08,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:39:08,952 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-20 06:39:08,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:39:09,188 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-20 06:39:09,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:39:09,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343191346] [2021-11-20 06:39:09,190 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:39:09,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156850083] [2021-11-20 06:39:09,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156850083] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:39:09,198 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:39:09,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-20 06:39:09,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662432882] [2021-11-20 06:39:09,203 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:39:09,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:39:09,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:39:09,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:39:09,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:39:09,205 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 06:39:09,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:39:09,381 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2021-11-20 06:39:09,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:39:09,386 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 40 [2021-11-20 06:39:09,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:39:09,388 INFO L225 Difference]: With dead ends: 48 [2021-11-20 06:39:09,388 INFO L226 Difference]: Without dead ends: 40 [2021-11-20 06:39:09,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:39:09,390 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 21 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:39:09,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 134 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:39:09,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-20 06:39:09,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2021-11-20 06:39:09,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-20 06:39:09,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2021-11-20 06:39:09,419 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 40 [2021-11-20 06:39:09,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:39:09,419 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2021-11-20 06:39:09,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 06:39:09,420 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2021-11-20 06:39:09,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 06:39:09,422 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:39:09,422 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:39:09,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:39:09,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:39:09,623 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:39:09,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:39:09,624 INFO L85 PathProgramCache]: Analyzing trace with hash 481927254, now seen corresponding path program 1 times [2021-11-20 06:39:09,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:39:09,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748528499] [2021-11-20 06:39:09,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:39:09,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:39:09,641 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:39:09,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1369476584] [2021-11-20 06:39:09,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:39:09,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:39:09,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:39:09,643 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:39:09,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:39:09,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:09,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 06:39:09,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:39:09,930 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-20 06:39:09,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:39:10,083 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-20 06:39:10,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:39:10,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748528499] [2021-11-20 06:39:10,086 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:39:10,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369476584] [2021-11-20 06:39:10,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369476584] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 06:39:10,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:39:10,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2021-11-20 06:39:10,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641816262] [2021-11-20 06:39:10,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:39:10,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:39:10,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:39:10,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:39:10,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:39:10,090 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-20 06:39:10,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:39:10,159 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2021-11-20 06:39:10,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:39:10,160 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 41 [2021-11-20 06:39:10,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:39:10,161 INFO L225 Difference]: With dead ends: 39 [2021-11-20 06:39:10,162 INFO L226 Difference]: Without dead ends: 37 [2021-11-20 06:39:10,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:39:10,163 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:39:10,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 130 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:39:10,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-20 06:39:10,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-11-20 06:39:10,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-20 06:39:10,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2021-11-20 06:39:10,190 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 41 [2021-11-20 06:39:10,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:39:10,191 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2021-11-20 06:39:10,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-20 06:39:10,191 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2021-11-20 06:39:10,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-20 06:39:10,195 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:39:10,196 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:39:10,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:39:10,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:39:10,422 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:39:10,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:39:10,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1626076469, now seen corresponding path program 1 times [2021-11-20 06:39:10,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:39:10,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720145216] [2021-11-20 06:39:10,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:39:10,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:39:10,438 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:39:10,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [982765594] [2021-11-20 06:39:10,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:39:10,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:39:10,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:39:10,440 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:39:10,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:39:10,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:10,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:39:10,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:39:10,731 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-20 06:39:10,732 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:39:10,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:39:10,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720145216] [2021-11-20 06:39:10,733 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:39:10,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982765594] [2021-11-20 06:39:10,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982765594] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:39:10,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:39:10,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:39:10,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177816468] [2021-11-20 06:39:10,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:39:10,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:39:10,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:39:10,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:39:10,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:39:10,738 INFO L87 Difference]: Start difference. First operand 37 states and 47 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) [2021-11-20 06:39:10,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:39:10,791 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2021-11-20 06:39:10,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:39:10,791 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 46 [2021-11-20 06:39:10,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:39:10,793 INFO L225 Difference]: With dead ends: 50 [2021-11-20 06:39:10,794 INFO L226 Difference]: Without dead ends: 48 [2021-11-20 06:39:10,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:39:10,796 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 7 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:39:10,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 157 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:39:10,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-20 06:39:10,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-11-20 06:39:10,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-20 06:39:10,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2021-11-20 06:39:10,816 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 46 [2021-11-20 06:39:10,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:39:10,817 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2021-11-20 06:39:10,817 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) [2021-11-20 06:39:10,818 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2021-11-20 06:39:10,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-20 06:39:10,819 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:39:10,819 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:39:10,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:39:11,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:39:11,050 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:39:11,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:39:11,050 INFO L85 PathProgramCache]: Analyzing trace with hash 779090230, now seen corresponding path program 1 times [2021-11-20 06:39:11,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:39:11,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42740567] [2021-11-20 06:39:11,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:39:11,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:39:11,066 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:39:11,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1493201728] [2021-11-20 06:39:11,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:39:11,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:39:11,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:39:11,068 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:39:11,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:39:11,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:11,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 06:39:11,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:39:11,485 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-20 06:39:11,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:39:11,648 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-20 06:39:11,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:39:11,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42740567] [2021-11-20 06:39:11,650 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:39:11,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493201728] [2021-11-20 06:39:11,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493201728] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 06:39:11,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:39:11,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2021-11-20 06:39:11,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830066136] [2021-11-20 06:39:11,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:39:11,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:39:11,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:39:11,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:39:11,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:39:11,655 INFO L87 Difference]: Start difference. First operand 47 states and 61 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-20 06:39:11,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:39:11,715 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2021-11-20 06:39:11,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:39:11,715 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2021-11-20 06:39:11,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:39:11,718 INFO L225 Difference]: With dead ends: 54 [2021-11-20 06:39:11,718 INFO L226 Difference]: Without dead ends: 52 [2021-11-20 06:39:11,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:39:11,720 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:39:11,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 147 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:39:11,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-20 06:39:11,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2021-11-20 06:39:11,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-20 06:39:11,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2021-11-20 06:39:11,749 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 51 [2021-11-20 06:39:11,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:39:11,753 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2021-11-20 06:39:11,754 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-20 06:39:11,754 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2021-11-20 06:39:11,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-20 06:39:11,757 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:39:11,757 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1, 1, 1, 1] [2021-11-20 06:39:11,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:39:11,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:39:11,958 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:39:11,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:39:11,959 INFO L85 PathProgramCache]: Analyzing trace with hash -670274197, now seen corresponding path program 1 times [2021-11-20 06:39:11,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:39:11,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438841951] [2021-11-20 06:39:11,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:39:11,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:39:11,969 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:39:11,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1199791745] [2021-11-20 06:39:11,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:39:11,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:39:11,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:39:11,971 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:39:11,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:39:12,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:12,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 06:39:12,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:39:12,335 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-20 06:39:12,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:39:12,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:39:12,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438841951] [2021-11-20 06:39:12,631 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:39:12,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199791745] [2021-11-20 06:39:12,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199791745] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:39:12,632 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:39:12,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-20 06:39:12,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290504918] [2021-11-20 06:39:12,632 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:39:12,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:39:12,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:39:12,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:39:12,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:39:12,634 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 06:39:12,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:39:12,757 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2021-11-20 06:39:12,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:39:12,757 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2021-11-20 06:39:12,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:39:12,759 INFO L225 Difference]: With dead ends: 58 [2021-11-20 06:39:12,759 INFO L226 Difference]: Without dead ends: 56 [2021-11-20 06:39:12,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:39:12,760 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 12 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:39:12,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 134 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:39:12,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-20 06:39:12,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-11-20 06:39:12,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-20 06:39:12,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2021-11-20 06:39:12,771 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 56 [2021-11-20 06:39:12,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:39:12,771 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2021-11-20 06:39:12,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 06:39:12,772 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2021-11-20 06:39:12,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-20 06:39:12,773 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:39:12,773 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:39:12,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:39:12,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:39:12,989 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:39:12,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:39:12,990 INFO L85 PathProgramCache]: Analyzing trace with hash -759965185, now seen corresponding path program 1 times [2021-11-20 06:39:12,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:39:12,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864720556] [2021-11-20 06:39:12,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:39:12,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:39:13,001 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:39:13,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1600557055] [2021-11-20 06:39:13,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:39:13,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:39:13,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:39:13,003 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:39:13,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 06:39:13,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:13,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:39:13,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:39:13,223 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-20 06:39:13,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:39:13,387 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-20 06:39:13,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:39:13,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864720556] [2021-11-20 06:39:13,388 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:39:13,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600557055] [2021-11-20 06:39:13,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600557055] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:39:13,388 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:39:13,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-11-20 06:39:13,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709789021] [2021-11-20 06:39:13,389 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:39:13,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:39:13,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:39:13,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:39:13,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:39:13,391 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-20 06:39:13,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:39:13,567 INFO L93 Difference]: Finished difference Result 102 states and 142 transitions. [2021-11-20 06:39:13,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:39:13,568 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 65 [2021-11-20 06:39:13,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:39:13,569 INFO L225 Difference]: With dead ends: 102 [2021-11-20 06:39:13,570 INFO L226 Difference]: Without dead ends: 94 [2021-11-20 06:39:13,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:39:13,571 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 32 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:39:13,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 257 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:39:13,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-20 06:39:13,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2021-11-20 06:39:13,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 47 states have internal predecessors, (55), 32 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-11-20 06:39:13,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 118 transitions. [2021-11-20 06:39:13,590 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 118 transitions. Word has length 65 [2021-11-20 06:39:13,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:39:13,591 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 118 transitions. [2021-11-20 06:39:13,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-20 06:39:13,591 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 118 transitions. [2021-11-20 06:39:13,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-20 06:39:13,593 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:39:13,593 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:39:13,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:39:13,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:39:13,822 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:39:13,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:39:13,822 INFO L85 PathProgramCache]: Analyzing trace with hash -696294669, now seen corresponding path program 1 times [2021-11-20 06:39:13,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:39:13,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452423793] [2021-11-20 06:39:13,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:39:13,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:39:13,833 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:39:13,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1232676172] [2021-11-20 06:39:13,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:39:13,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:39:13,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:39:13,835 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:39:13,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 06:39:13,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:13,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 06:39:13,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:39:14,220 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-20 06:39:14,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:39:14,458 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-20 06:39:14,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:39:14,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452423793] [2021-11-20 06:39:14,459 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:39:14,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232676172] [2021-11-20 06:39:14,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232676172] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:39:14,459 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:39:14,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-11-20 06:39:14,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607399847] [2021-11-20 06:39:14,460 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:39:14,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 06:39:14,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:39:14,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 06:39:14,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:39:14,462 INFO L87 Difference]: Start difference. First operand 85 states and 118 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-11-20 06:39:14,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:39:14,852 INFO L93 Difference]: Finished difference Result 128 states and 183 transitions. [2021-11-20 06:39:14,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:39:14,853 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 71 [2021-11-20 06:39:14,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:39:14,856 INFO L225 Difference]: With dead ends: 128 [2021-11-20 06:39:14,856 INFO L226 Difference]: Without dead ends: 124 [2021-11-20 06:39:14,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:39:14,858 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 36 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:39:14,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 312 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:39:14,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-20 06:39:14,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 92. [2021-11-20 06:39:14,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 50 states have (on average 1.18) internal successors, (59), 52 states have internal predecessors, (59), 34 states have call successors, (34), 7 states have call predecessors, (34), 7 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2021-11-20 06:39:14,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 126 transitions. [2021-11-20 06:39:14,882 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 126 transitions. Word has length 71 [2021-11-20 06:39:14,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:39:14,883 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 126 transitions. [2021-11-20 06:39:14,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-11-20 06:39:14,883 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 126 transitions. [2021-11-20 06:39:14,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-20 06:39:14,885 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:39:14,885 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:39:14,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 06:39:15,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:39:15,103 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:39:15,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:39:15,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1352497678, now seen corresponding path program 2 times [2021-11-20 06:39:15,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:39:15,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284748476] [2021-11-20 06:39:15,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:39:15,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:39:15,113 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:39:15,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1697532060] [2021-11-20 06:39:15,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:39:15,114 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:39:15,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:39:15,115 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:39:15,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 06:39:15,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:39:15,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:39:15,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-20 06:39:15,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:39:15,569 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-20 06:39:15,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:39:15,802 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-20 06:39:15,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:39:15,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284748476] [2021-11-20 06:39:15,803 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:39:15,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697532060] [2021-11-20 06:39:15,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697532060] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:39:15,804 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:39:15,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-11-20 06:39:15,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023645986] [2021-11-20 06:39:15,807 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:39:15,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:39:15,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:39:15,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:39:15,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:39:15,809 INFO L87 Difference]: Start difference. First operand 92 states and 126 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 7 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2021-11-20 06:39:16,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:39:16,933 INFO L93 Difference]: Finished difference Result 116 states and 159 transitions. [2021-11-20 06:39:16,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:39:16,934 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 7 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 76 [2021-11-20 06:39:16,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:39:16,936 INFO L225 Difference]: With dead ends: 116 [2021-11-20 06:39:16,936 INFO L226 Difference]: Without dead ends: 114 [2021-11-20 06:39:16,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:39:16,938 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 23 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:39:16,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 221 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 06:39:16,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-20 06:39:16,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 96. [2021-11-20 06:39:16,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 53 states have (on average 1.169811320754717) internal successors, (62), 55 states have internal predecessors, (62), 34 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2021-11-20 06:39:16,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 129 transitions. [2021-11-20 06:39:16,973 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 129 transitions. Word has length 76 [2021-11-20 06:39:16,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:39:16,974 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 129 transitions. [2021-11-20 06:39:16,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 7 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2021-11-20 06:39:16,975 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 129 transitions. [2021-11-20 06:39:16,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-20 06:39:16,976 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:39:16,976 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:39:17,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 06:39:17,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-20 06:39:17,202 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:39:17,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:39:17,202 INFO L85 PathProgramCache]: Analyzing trace with hash -421153901, now seen corresponding path program 3 times [2021-11-20 06:39:17,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:39:17,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676914274] [2021-11-20 06:39:17,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:39:17,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:39:17,214 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:39:17,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1414134615] [2021-11-20 06:39:17,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:39:17,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:39:17,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:39:17,219 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:39:17,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 06:39:17,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 06:39:17,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:39:17,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-20 06:39:17,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:39:17,820 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 31 proven. 8 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-20 06:39:17,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:39:17,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:39:17,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676914274] [2021-11-20 06:39:17,971 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:39:17,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414134615] [2021-11-20 06:39:17,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414134615] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:39:17,971 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:39:17,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-20 06:39:17,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077152021] [2021-11-20 06:39:17,971 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:39:17,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 06:39:17,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:39:17,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 06:39:17,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:39:17,974 INFO L87 Difference]: Start difference. First operand 96 states and 129 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-20 06:39:18,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:39:18,373 INFO L93 Difference]: Finished difference Result 128 states and 168 transitions. [2021-11-20 06:39:18,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:39:18,374 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 81 [2021-11-20 06:39:18,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:39:18,378 INFO L225 Difference]: With dead ends: 128 [2021-11-20 06:39:18,378 INFO L226 Difference]: Without dead ends: 126 [2021-11-20 06:39:18,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:39:18,379 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 28 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:39:18,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 226 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:39:18,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-20 06:39:18,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2021-11-20 06:39:18,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 69 states have (on average 1.1594202898550725) internal successors, (80), 71 states have internal predecessors, (80), 42 states have call successors, (42), 11 states have call predecessors, (42), 11 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2021-11-20 06:39:18,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 163 transitions. [2021-11-20 06:39:18,418 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 163 transitions. Word has length 81 [2021-11-20 06:39:18,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:39:18,419 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 163 transitions. [2021-11-20 06:39:18,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-20 06:39:18,419 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 163 transitions. [2021-11-20 06:39:18,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-20 06:39:18,421 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:39:18,421 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:39:18,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 06:39:18,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 06:39:18,637 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:39:18,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:39:18,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1712962370, now seen corresponding path program 1 times [2021-11-20 06:39:18,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:39:18,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963078401] [2021-11-20 06:39:18,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:39:18,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:39:18,649 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:39:18,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [836051023] [2021-11-20 06:39:18,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:39:18,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:39:18,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:39:18,651 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:39:18,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 06:39:18,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:18,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-20 06:39:18,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:39:19,375 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 33 proven. 12 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-11-20 06:39:19,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:39:20,265 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 33 proven. 12 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-11-20 06:39:20,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:39:20,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963078401] [2021-11-20 06:39:20,269 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:39:20,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836051023] [2021-11-20 06:39:20,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836051023] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:39:20,270 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:39:20,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-11-20 06:39:20,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893274089] [2021-11-20 06:39:20,270 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:39:20,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 06:39:20,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:39:20,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 06:39:20,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:39:20,273 INFO L87 Difference]: Start difference. First operand 123 states and 163 transitions. Second operand has 19 states, 17 states have (on average 2.176470588235294) internal successors, (37), 18 states have internal predecessors, (37), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2021-11-20 06:39:23,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:39:23,490 INFO L93 Difference]: Finished difference Result 205 states and 282 transitions. [2021-11-20 06:39:23,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-20 06:39:23,492 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.176470588235294) internal successors, (37), 18 states have internal predecessors, (37), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) Word has length 87 [2021-11-20 06:39:23,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:39:23,494 INFO L225 Difference]: With dead ends: 205 [2021-11-20 06:39:23,495 INFO L226 Difference]: Without dead ends: 196 [2021-11-20 06:39:23,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=222, Invalid=1038, Unknown=0, NotChecked=0, Total=1260 [2021-11-20 06:39:23,497 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 61 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:39:23,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 444 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:39:23,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-20 06:39:23,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 192. [2021-11-20 06:39:23,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 107 states have (on average 1.1775700934579438) internal successors, (126), 109 states have internal predecessors, (126), 70 states have call successors, (70), 14 states have call predecessors, (70), 14 states have return successors, (69), 68 states have call predecessors, (69), 69 states have call successors, (69) [2021-11-20 06:39:23,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 265 transitions. [2021-11-20 06:39:23,565 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 265 transitions. Word has length 87 [2021-11-20 06:39:23,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:39:23,566 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 265 transitions. [2021-11-20 06:39:23,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.176470588235294) internal successors, (37), 18 states have internal predecessors, (37), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2021-11-20 06:39:23,567 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 265 transitions. [2021-11-20 06:39:23,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-20 06:39:23,569 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:39:23,569 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:39:23,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 06:39:23,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-20 06:39:23,797 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:39:23,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:39:23,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1899970478, now seen corresponding path program 1 times [2021-11-20 06:39:23,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:39:23,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361639904] [2021-11-20 06:39:23,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:39:23,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:39:23,807 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:39:23,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [980201166] [2021-11-20 06:39:23,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:39:23,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:39:23,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:39:23,827 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:39:23,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 06:39:23,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:23,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-20 06:39:23,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:39:25,050 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 59 proven. 35 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-11-20 06:39:25,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:39:30,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:39:30,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361639904] [2021-11-20 06:39:30,087 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:39:30,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980201166] [2021-11-20 06:39:30,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980201166] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:39:30,087 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:39:30,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-20 06:39:30,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93841534] [2021-11-20 06:39:30,088 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:39:30,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 06:39:30,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:39:30,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 06:39:30,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=184, Unknown=2, NotChecked=0, Total=240 [2021-11-20 06:39:30,089 INFO L87 Difference]: Start difference. First operand 192 states and 265 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2021-11-20 06:39:30,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:39:30,873 INFO L93 Difference]: Finished difference Result 199 states and 271 transitions. [2021-11-20 06:39:30,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:39:30,874 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) Word has length 103 [2021-11-20 06:39:30,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:39:30,881 INFO L225 Difference]: With dead ends: 199 [2021-11-20 06:39:30,881 INFO L226 Difference]: Without dead ends: 197 [2021-11-20 06:39:30,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=76, Invalid=264, Unknown=2, NotChecked=0, Total=342 [2021-11-20 06:39:30,883 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 20 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:39:30,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 302 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 06:39:30,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-20 06:39:30,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2021-11-20 06:39:30,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 110 states have (on average 1.1727272727272726) internal successors, (129), 112 states have internal predecessors, (129), 70 states have call successors, (70), 15 states have call predecessors, (70), 15 states have return successors, (69), 68 states have call predecessors, (69), 69 states have call successors, (69) [2021-11-20 06:39:30,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 268 transitions. [2021-11-20 06:39:30,954 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 268 transitions. Word has length 103 [2021-11-20 06:39:30,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:39:30,954 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 268 transitions. [2021-11-20 06:39:30,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2021-11-20 06:39:30,955 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 268 transitions. [2021-11-20 06:39:30,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-20 06:39:30,958 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:39:30,959 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:39:31,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 06:39:31,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:39:31,181 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:39:31,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:39:31,182 INFO L85 PathProgramCache]: Analyzing trace with hash -992204181, now seen corresponding path program 4 times [2021-11-20 06:39:31,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:39:31,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85086876] [2021-11-20 06:39:31,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:39:31,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:39:31,192 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:39:31,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1383846540] [2021-11-20 06:39:31,192 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:39:31,193 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:39:31,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:39:31,205 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:39:31,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 06:39:31,260 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:39:31,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:39:31,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:39:31,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:39:31,464 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-20 06:39:31,464 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:39:31,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:39:31,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85086876] [2021-11-20 06:39:31,464 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:39:31,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383846540] [2021-11-20 06:39:31,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383846540] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:39:31,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:39:31,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:39:31,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111204742] [2021-11-20 06:39:31,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:39:31,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:39:31,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:39:31,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:39:31,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:39:31,466 INFO L87 Difference]: Start difference. First operand 196 states and 268 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-20 06:39:31,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:39:31,582 INFO L93 Difference]: Finished difference Result 258 states and 354 transitions. [2021-11-20 06:39:31,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:39:31,582 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 106 [2021-11-20 06:39:31,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:39:31,585 INFO L225 Difference]: With dead ends: 258 [2021-11-20 06:39:31,586 INFO L226 Difference]: Without dead ends: 184 [2021-11-20 06:39:31,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:39:31,588 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 6 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:39:31,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 167 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:39:31,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-11-20 06:39:31,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 171. [2021-11-20 06:39:31,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 96 states have (on average 1.125) internal successors, (108), 97 states have internal predecessors, (108), 59 states have call successors, (59), 15 states have call predecessors, (59), 15 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2021-11-20 06:39:31,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 225 transitions. [2021-11-20 06:39:31,633 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 225 transitions. Word has length 106 [2021-11-20 06:39:31,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:39:31,634 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 225 transitions. [2021-11-20 06:39:31,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-20 06:39:31,635 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 225 transitions. [2021-11-20 06:39:31,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-20 06:39:31,642 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:39:31,642 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:39:31,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 06:39:31,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:39:31,862 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:39:31,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:39:31,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1098112047, now seen corresponding path program 2 times [2021-11-20 06:39:31,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:39:31,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166140703] [2021-11-20 06:39:31,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:39:31,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:39:31,871 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:39:31,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [681651549] [2021-11-20 06:39:31,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:39:31,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:39:31,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:39:31,873 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:39:31,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 06:39:31,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:39:31,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:39:31,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-20 06:39:31,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:39:33,250 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 91 proven. 52 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2021-11-20 06:39:33,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:39:44,152 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 91 proven. 52 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2021-11-20 06:39:44,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:39:44,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166140703] [2021-11-20 06:39:44,152 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:39:44,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681651549] [2021-11-20 06:39:44,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681651549] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:39:44,152 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:39:44,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-11-20 06:39:44,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750856649] [2021-11-20 06:39:44,153 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:39:44,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 06:39:44,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:39:44,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 06:39:44,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-11-20 06:39:44,154 INFO L87 Difference]: Start difference. First operand 171 states and 225 transitions. Second operand has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 14 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (38), 12 states have call predecessors, (38), 13 states have call successors, (38) [2021-11-20 06:39:55,102 WARN L227 SmtUtils]: Spent 9.34s on a formula simplification that was a NOOP. DAG size: 79 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:40:08,444 WARN L227 SmtUtils]: Spent 11.82s on a formula simplification that was a NOOP. DAG size: 79 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:40:21,673 WARN L227 SmtUtils]: Spent 12.60s on a formula simplification that was a NOOP. DAG size: 71 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:40:23,703 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:40:27,872 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:40:30,891 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:40:34,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:40:34,064 INFO L93 Difference]: Finished difference Result 262 states and 355 transitions. [2021-11-20 06:40:34,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 06:40:34,065 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 14 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (38), 12 states have call predecessors, (38), 13 states have call successors, (38) Word has length 125 [2021-11-20 06:40:34,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:40:34,070 INFO L225 Difference]: With dead ends: 262 [2021-11-20 06:40:34,070 INFO L226 Difference]: Without dead ends: 260 [2021-11-20 06:40:34,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 229 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 41.3s TimeCoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2021-11-20 06:40:34,072 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 79 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 150 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:40:34,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 444 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 634 Invalid, 2 Unknown, 0 Unchecked, 10.7s Time] [2021-11-20 06:40:34,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-11-20 06:40:34,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 258. [2021-11-20 06:40:34,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 143 states have (on average 1.132867132867133) internal successors, (162), 145 states have internal predecessors, (162), 95 states have call successors, (95), 19 states have call predecessors, (95), 19 states have return successors, (94), 93 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-20 06:40:34,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 351 transitions. [2021-11-20 06:40:34,164 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 351 transitions. Word has length 125 [2021-11-20 06:40:34,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:40:34,164 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 351 transitions. [2021-11-20 06:40:34,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 14 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (38), 12 states have call predecessors, (38), 13 states have call successors, (38) [2021-11-20 06:40:34,165 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 351 transitions. [2021-11-20 06:40:34,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-20 06:40:34,167 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:40:34,167 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:40:34,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 06:40:34,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 06:40:34,385 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:40:34,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:40:34,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1816082155, now seen corresponding path program 2 times [2021-11-20 06:40:34,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:40:34,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149824817] [2021-11-20 06:40:34,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:40:34,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:40:34,395 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:40:34,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [349995180] [2021-11-20 06:40:34,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:40:34,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:40:34,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:40:34,397 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:40:34,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 06:40:34,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:40:34,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:40:34,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-20 06:40:34,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:40:37,641 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 143 proven. 64 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2021-11-20 06:40:37,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:40:39,773 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 154 proven. 12 refuted. 0 times theorem prover too weak. 449 trivial. 0 not checked. [2021-11-20 06:40:39,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:40:39,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149824817] [2021-11-20 06:40:39,774 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:40:39,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349995180] [2021-11-20 06:40:39,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349995180] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:40:39,774 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:40:39,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12] total 29 [2021-11-20 06:40:39,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620623750] [2021-11-20 06:40:39,775 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:40:39,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-20 06:40:39,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:40:39,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-20 06:40:39,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2021-11-20 06:40:39,778 INFO L87 Difference]: Start difference. First operand 258 states and 351 transitions. Second operand has 29 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 21 states have internal predecessors, (48), 15 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (34), 12 states have call predecessors, (34), 13 states have call successors, (34) [2021-11-20 06:40:57,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:40:57,467 INFO L93 Difference]: Finished difference Result 307 states and 414 transitions. [2021-11-20 06:40:57,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-20 06:40:57,468 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 21 states have internal predecessors, (48), 15 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (34), 12 states have call predecessors, (34), 13 states have call successors, (34) Word has length 134 [2021-11-20 06:40:57,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:40:57,471 INFO L225 Difference]: With dead ends: 307 [2021-11-20 06:40:57,471 INFO L226 Difference]: Without dead ends: 299 [2021-11-20 06:40:57,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=440, Invalid=2110, Unknown=0, NotChecked=0, Total=2550 [2021-11-20 06:40:57,473 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 79 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:40:57,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 440 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 1038 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2021-11-20 06:40:57,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-11-20 06:40:57,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 236. [2021-11-20 06:40:57,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 131 states have (on average 1.099236641221374) internal successors, (144), 132 states have internal predecessors, (144), 82 states have call successors, (82), 22 states have call predecessors, (82), 22 states have return successors, (82), 81 states have call predecessors, (82), 82 states have call successors, (82) [2021-11-20 06:40:57,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 308 transitions. [2021-11-20 06:40:57,567 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 308 transitions. Word has length 134 [2021-11-20 06:40:57,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:40:57,568 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 308 transitions. [2021-11-20 06:40:57,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 21 states have internal predecessors, (48), 15 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (34), 12 states have call predecessors, (34), 13 states have call successors, (34) [2021-11-20 06:40:57,568 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 308 transitions. [2021-11-20 06:40:57,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-20 06:40:57,571 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:40:57,572 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:40:57,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 06:40:57,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-20 06:40:57,789 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:40:57,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:40:57,790 INFO L85 PathProgramCache]: Analyzing trace with hash 2095255219, now seen corresponding path program 3 times [2021-11-20 06:40:57,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:40:57,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469279844] [2021-11-20 06:40:57,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:40:57,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:40:57,798 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:40:57,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [31048759] [2021-11-20 06:40:57,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:40:57,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:40:57,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:40:57,803 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:40:57,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 06:41:04,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 06:41:04,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:41:04,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-20 06:41:04,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:41:10,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 177 proven. 41 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2021-11-20 06:41:10,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:41:11,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:41:11,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469279844] [2021-11-20 06:41:11,232 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:41:11,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31048759] [2021-11-20 06:41:11,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31048759] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:41:11,232 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:41:11,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-20 06:41:11,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057001339] [2021-11-20 06:41:11,232 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:41:11,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 06:41:11,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:41:11,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 06:41:11,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-11-20 06:41:11,234 INFO L87 Difference]: Start difference. First operand 236 states and 308 transitions. Second operand has 18 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 9 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2021-11-20 06:41:20,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:41:20,877 INFO L93 Difference]: Finished difference Result 335 states and 461 transitions. [2021-11-20 06:41:20,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-20 06:41:20,877 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 9 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) Word has length 175 [2021-11-20 06:41:20,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:41:20,880 INFO L225 Difference]: With dead ends: 335 [2021-11-20 06:41:20,881 INFO L226 Difference]: Without dead ends: 333 [2021-11-20 06:41:20,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2021-11-20 06:41:20,882 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 40 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:41:20,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 390 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-11-20 06:41:20,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-11-20 06:41:20,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 328. [2021-11-20 06:41:20,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 172 states have (on average 1.127906976744186) internal successors, (194), 174 states have internal predecessors, (194), 130 states have call successors, (130), 25 states have call predecessors, (130), 25 states have return successors, (130), 128 states have call predecessors, (130), 130 states have call successors, (130) [2021-11-20 06:41:20,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 454 transitions. [2021-11-20 06:41:20,995 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 454 transitions. Word has length 175 [2021-11-20 06:41:20,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:41:20,995 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 454 transitions. [2021-11-20 06:41:20,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 9 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2021-11-20 06:41:20,996 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 454 transitions. [2021-11-20 06:41:21,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-20 06:41:21,000 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:41:21,000 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 27, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:41:21,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 06:41:21,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-20 06:41:21,207 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:41:21,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:41:21,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1062534286, now seen corresponding path program 4 times [2021-11-20 06:41:21,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:41:21,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675566373] [2021-11-20 06:41:21,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:41:21,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:41:21,215 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:41:21,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [443822585] [2021-11-20 06:41:21,216 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:41:21,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:41:21,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:41:21,221 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:41:21,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 06:41:21,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:41:21,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:41:21,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 125 conjunts are in the unsatisfiable core [2021-11-20 06:41:21,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:41:26,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 279 proven. 396 refuted. 0 times theorem prover too weak. 978 trivial. 0 not checked. [2021-11-20 06:41:26,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:41:40,648 WARN L227 SmtUtils]: Spent 8.92s on a formula simplification that was a NOOP. DAG size: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:41:53,052 WARN L227 SmtUtils]: Spent 5.07s on a formula simplification that was a NOOP. DAG size: 76 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:41:53,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:41:53,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675566373] [2021-11-20 06:41:53,054 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:41:53,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443822585] [2021-11-20 06:41:53,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443822585] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:41:53,054 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:41:53,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-11-20 06:41:53,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140149788] [2021-11-20 06:41:53,054 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:41:53,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 06:41:53,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:41:53,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 06:41:53,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=778, Unknown=2, NotChecked=0, Total=992 [2021-11-20 06:41:53,056 INFO L87 Difference]: Start difference. First operand 328 states and 454 transitions. Second operand has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 19 states have internal predecessors, (40), 12 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (33), 11 states have call predecessors, (33), 12 states have call successors, (33) [2021-11-20 06:41:58,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:41:58,679 INFO L93 Difference]: Finished difference Result 408 states and 561 transitions. [2021-11-20 06:41:58,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-20 06:41:58,690 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 19 states have internal predecessors, (40), 12 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (33), 11 states have call predecessors, (33), 12 states have call successors, (33) Word has length 197 [2021-11-20 06:41:58,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:41:58,694 INFO L225 Difference]: With dead ends: 408 [2021-11-20 06:41:58,694 INFO L226 Difference]: Without dead ends: 406 [2021-11-20 06:41:58,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 200 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 23.7s TimeCoverageRelationStatistics Valid=335, Invalid=1385, Unknown=2, NotChecked=0, Total=1722 [2021-11-20 06:41:58,696 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 43 mSDsluCounter, 912 mSDsCounter, 0 mSdLazyCounter, 1335 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 1395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:41:58,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 972 Invalid, 1395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1335 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-11-20 06:41:58,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-11-20 06:41:58,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 400. [2021-11-20 06:41:58,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 210 states have (on average 1.1285714285714286) internal successors, (237), 212 states have internal predecessors, (237), 158 states have call successors, (158), 31 states have call predecessors, (158), 31 states have return successors, (158), 156 states have call predecessors, (158), 158 states have call successors, (158) [2021-11-20 06:41:58,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 553 transitions. [2021-11-20 06:41:58,835 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 553 transitions. Word has length 197 [2021-11-20 06:41:58,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:41:58,836 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 553 transitions. [2021-11-20 06:41:58,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 19 states have internal predecessors, (40), 12 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (33), 11 states have call predecessors, (33), 12 states have call successors, (33) [2021-11-20 06:41:58,836 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 553 transitions. [2021-11-20 06:41:58,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-11-20 06:41:58,840 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:41:58,840 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 31, 8, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:41:58,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-20 06:41:59,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-20 06:41:59,046 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:41:59,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:41:59,046 INFO L85 PathProgramCache]: Analyzing trace with hash -2042278159, now seen corresponding path program 5 times [2021-11-20 06:41:59,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:41:59,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318170234] [2021-11-20 06:41:59,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:41:59,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:41:59,055 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:41:59,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [259152833] [2021-11-20 06:41:59,055 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:41:59,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:41:59,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:41:59,059 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:41:59,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 06:41:59,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-11-20 06:41:59,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:41:59,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 104 conjunts are in the unsatisfiable core [2021-11-20 06:41:59,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:42:09,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2158 backedges. 230 proven. 275 refuted. 0 times theorem prover too weak. 1653 trivial. 0 not checked. [2021-11-20 06:42:09,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:42:38,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:42:38,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318170234] [2021-11-20 06:42:38,785 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:42:38,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259152833] [2021-11-20 06:42:38,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259152833] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:42:38,785 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:42:38,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-11-20 06:42:38,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977463234] [2021-11-20 06:42:38,786 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:42:38,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-20 06:42:38,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:42:38,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-20 06:42:38,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1110, Unknown=3, NotChecked=0, Total=1406 [2021-11-20 06:42:38,788 INFO L87 Difference]: Start difference. First operand 400 states and 553 transitions. Second operand has 25 states, 25 states have (on average 1.8) internal successors, (45), 22 states have internal predecessors, (45), 12 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (37), 12 states have call predecessors, (37), 12 states have call successors, (37) [2021-11-20 06:42:44,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:42:44,180 INFO L93 Difference]: Finished difference Result 473 states and 636 transitions. [2021-11-20 06:42:44,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-20 06:42:44,181 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 22 states have internal predecessors, (45), 12 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (37), 12 states have call predecessors, (37), 12 states have call successors, (37) Word has length 219 [2021-11-20 06:42:44,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:42:44,186 INFO L225 Difference]: With dead ends: 473 [2021-11-20 06:42:44,187 INFO L226 Difference]: Without dead ends: 471 [2021-11-20 06:42:44,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 294 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 25.1s TimeCoverageRelationStatistics Valid=502, Invalid=2147, Unknown=3, NotChecked=0, Total=2652 [2021-11-20 06:42:44,189 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 61 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 1750 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 1847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:42:44,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 952 Invalid, 1847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1750 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-20 06:42:44,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-11-20 06:42:44,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 426. [2021-11-20 06:42:44,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 227 states have (on average 1.1233480176211454) internal successors, (255), 229 states have internal predecessors, (255), 162 states have call successors, (162), 36 states have call predecessors, (162), 36 states have return successors, (162), 160 states have call predecessors, (162), 162 states have call successors, (162) [2021-11-20 06:42:44,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 579 transitions. [2021-11-20 06:42:44,386 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 579 transitions. Word has length 219 [2021-11-20 06:42:44,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:42:44,387 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 579 transitions. [2021-11-20 06:42:44,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 22 states have internal predecessors, (45), 12 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (37), 12 states have call predecessors, (37), 12 states have call successors, (37) [2021-11-20 06:42:44,387 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 579 transitions. [2021-11-20 06:42:44,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-11-20 06:42:44,391 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:42:44,391 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 31, 8, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:42:44,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-20 06:42:44,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:42:44,605 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:42:44,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:44,606 INFO L85 PathProgramCache]: Analyzing trace with hash 474997075, now seen corresponding path program 6 times [2021-11-20 06:42:44,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:42:44,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026564614] [2021-11-20 06:42:44,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:44,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:42:44,614 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:42:44,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [981556976] [2021-11-20 06:42:44,614 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 06:42:44,614 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:42:44,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:42:44,616 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:42:44,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-20 06:42:45,880 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-20 06:42:45,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:42:45,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-20 06:42:45,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:42:54,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2158 backedges. 312 proven. 31 refuted. 0 times theorem prover too weak. 1815 trivial. 0 not checked. [2021-11-20 06:42:54,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:42:55,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:42:55,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026564614] [2021-11-20 06:42:55,239 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:42:55,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981556976] [2021-11-20 06:42:55,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981556976] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:42:55,239 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:42:55,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-11-20 06:42:55,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957456732] [2021-11-20 06:42:55,239 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:42:55,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 06:42:55,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:42:55,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 06:42:55,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=278, Unknown=1, NotChecked=0, Total=342 [2021-11-20 06:42:55,241 INFO L87 Difference]: Start difference. First operand 426 states and 579 transitions. Second operand has 17 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 8 states have call predecessors, (17), 6 states have call successors, (17) [2021-11-20 06:43:05,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:05,573 INFO L93 Difference]: Finished difference Result 431 states and 583 transitions. [2021-11-20 06:43:05,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-20 06:43:05,574 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 8 states have call predecessors, (17), 6 states have call successors, (17) Word has length 219 [2021-11-20 06:43:05,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:05,575 INFO L225 Difference]: With dead ends: 431 [2021-11-20 06:43:05,575 INFO L226 Difference]: Without dead ends: 0 [2021-11-20 06:43:05,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 206 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=116, Invalid=531, Unknown=3, NotChecked=0, Total=650 [2021-11-20 06:43:05,578 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 30 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:05,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 268 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 470 Invalid, 0 Unknown, 16 Unchecked, 2.5s Time] [2021-11-20 06:43:05,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-20 06:43:05,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-20 06:43:05,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:05,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-20 06:43:05,580 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 219 [2021-11-20 06:43:05,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:05,580 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-20 06:43:05,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 8 states have call predecessors, (17), 6 states have call successors, (17) [2021-11-20 06:43:05,581 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-20 06:43:05,581 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-20 06:43:05,583 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-20 06:43:05,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-20 06:43:05,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:43:05,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-20 06:44:11,068 WARN L227 SmtUtils]: Spent 59.53s on a formula simplification. DAG size of input: 331 DAG size of output: 50 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-20 06:44:41,670 WARN L227 SmtUtils]: Spent 30.60s on a formula simplification. DAG size of input: 250 DAG size of output: 51 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-20 06:45:37,554 WARN L227 SmtUtils]: Spent 55.87s on a formula simplification. DAG size of input: 333 DAG size of output: 46 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-20 06:46:25,183 WARN L227 SmtUtils]: Spent 47.63s on a formula simplification. DAG size of input: 333 DAG size of output: 46 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-20 06:47:12,037 WARN L227 SmtUtils]: Spent 46.85s on a formula simplification. DAG size of input: 339 DAG size of output: 47 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-20 06:47:54,905 WARN L227 SmtUtils]: Spent 42.71s on a formula simplification. DAG size of input: 339 DAG size of output: 47 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-20 06:47:56,371 INFO L854 garLoopResultBuilder]: At program point L48(line 48) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~yy~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (.cse1 (<= 1 |ULTIMATE.start_main_~y~0#1|)) (.cse2 (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~xy~0#1|)) (.cse3 (= |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|)))) (.cse4 (<= 0 |ULTIMATE.start_main_~c~0#1|)) (.cse5 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse6 (<= |ULTIMATE.start_main_~y~0#1| 20)) (.cse7 (<= |ULTIMATE.start_main_~x~0#1| 20)) (.cse8 (= (+ (* |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~b~0#1|) |ULTIMATE.start_main_~c~0#1|) |ULTIMATE.start_main_~a~0#1|)) (.cse9 (= |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|))))) (or (and (< 0 |ULTIMATE.start_main_~b~0#1|) .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 (< |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~a~0#1|) .cse7 .cse8 .cse9) (and .cse0 .cse1 .cse2 .cse3 .cse4 (= |ULTIMATE.start_main_~r~0#1| 0) (= |ULTIMATE.start_main_~q~0#1| 0) .cse5 .cse6 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|) .cse7 .cse8 .cse9 (= |ULTIMATE.start_main_~s~0#1| 1)))) [2021-11-20 06:47:56,371 INFO L854 garLoopResultBuilder]: At program point L48-1(line 48) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~yy~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (.cse1 (<= 1 |ULTIMATE.start_main_~y~0#1|)) (.cse2 (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~xy~0#1|)) (.cse3 (= |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|)))) (.cse4 (<= 0 |ULTIMATE.start_main_~c~0#1|)) (.cse5 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse6 (<= |ULTIMATE.start_main_~y~0#1| 20)) (.cse7 (<= |ULTIMATE.start_main_~x~0#1| 20)) (.cse8 (= (+ (* |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~b~0#1|) |ULTIMATE.start_main_~c~0#1|) |ULTIMATE.start_main_~a~0#1|)) (.cse9 (= |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|))))) (or (and (< 0 |ULTIMATE.start_main_~b~0#1|) .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 (< |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~a~0#1|) .cse7 .cse8 .cse9) (and .cse0 .cse1 .cse2 .cse3 .cse4 (= |ULTIMATE.start_main_~r~0#1| 0) (= |ULTIMATE.start_main_~q~0#1| 0) .cse5 .cse6 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|) .cse7 .cse8 .cse9 (= |ULTIMATE.start_main_~s~0#1| 1)))) [2021-11-20 06:47:56,371 INFO L861 garLoopResultBuilder]: At program point L73(lines 18 74) the Hoare annotation is: true [2021-11-20 06:47:56,371 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-11-20 06:47:56,372 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-20 06:47:56,372 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-11-20 06:47:56,372 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| 20)) [2021-11-20 06:47:56,372 INFO L854 garLoopResultBuilder]: At program point L24-1(line 24) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~y~0#1| 20) (<= |ULTIMATE.start_main_~x~0#1| 20)) [2021-11-20 06:47:56,372 INFO L854 garLoopResultBuilder]: At program point L49(line 49) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~yy~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (.cse1 (<= 1 |ULTIMATE.start_main_~y~0#1|)) (.cse2 (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~xy~0#1|)) (.cse3 (= |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|)))) (.cse4 (<= 0 |ULTIMATE.start_main_~c~0#1|)) (.cse5 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse6 (<= |ULTIMATE.start_main_~y~0#1| 20)) (.cse7 (<= |ULTIMATE.start_main_~x~0#1| 20)) (.cse8 (= (+ (* |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~b~0#1|) |ULTIMATE.start_main_~c~0#1|) |ULTIMATE.start_main_~a~0#1|)) (.cse9 (= |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|))))) (or (and (< 0 |ULTIMATE.start_main_~b~0#1|) .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 (< |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~a~0#1|) .cse7 .cse8 .cse9) (and .cse0 .cse1 .cse2 .cse3 .cse4 (= |ULTIMATE.start_main_~r~0#1| 0) (= |ULTIMATE.start_main_~q~0#1| 0) .cse5 .cse6 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|) .cse7 .cse8 .cse9 (= |ULTIMATE.start_main_~s~0#1| 1)))) [2021-11-20 06:47:56,372 INFO L854 garLoopResultBuilder]: At program point L41-1(lines 39 68) the Hoare annotation is: (let ((.cse0 (+ (* |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 ((.cse1 (= |ULTIMATE.start_main_~yy~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (.cse2 (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~xy~0#1|)) (.cse3 (= |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|)))) (.cse4 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse5 (<= |ULTIMATE.start_main_~y~0#1| 20)) (.cse6 (<= |ULTIMATE.start_main_~x~0#1| 20)) (.cse7 (= |ULTIMATE.start_main_~a~0#1| .cse0))) (or (and (or (<= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~c~0#1|) (not (= |ULTIMATE.start_main_~c~0#1| 0)) (= (+ (* |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~s~0#1|)) .cse0)) (<= 0 |ULTIMATE.start_main_~b~0#1|) .cse1 (<= 1 |ULTIMATE.start_main_~y~0#1|) .cse2 .cse3 .cse4 .cse5 (< |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~a~0#1|) .cse6 .cse7) (and .cse1 .cse2 .cse3 (<= 1 |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~r~0#1| 0) (= |ULTIMATE.start_main_~q~0#1| 0) .cse4 .cse5 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|) .cse6 .cse7 (= |ULTIMATE.start_main_~s~0#1| 1))))) [2021-11-20 06:47:56,372 INFO L854 garLoopResultBuilder]: At program point L41-2(lines 41 68) the Hoare annotation is: (let ((.cse0 (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|)))) (and (<= 1 |ULTIMATE.start_main_~y~0#1|) (= 0 .cse0) (= |ULTIMATE.start_main_~b~0#1| .cse0) (<= 1 |ULTIMATE.start_main_~x~0#1|) (= |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|))))) [2021-11-20 06:47:56,372 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-20 06:47:56,372 INFO L854 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~y~0#1|) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~y~0#1| 20) (<= |ULTIMATE.start_main_~x~0#1| 20)) [2021-11-20 06:47:56,373 INFO L854 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (let ((.cse9 (+ (* |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_~yy~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (.cse1 (<= 1 |ULTIMATE.start_main_~y~0#1|)) (.cse2 (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~xy~0#1|)) (.cse3 (= |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|)))) (.cse4 (<= 0 |ULTIMATE.start_main_~c~0#1|)) (.cse5 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse6 (<= |ULTIMATE.start_main_~y~0#1| 20)) (.cse7 (<= |ULTIMATE.start_main_~x~0#1| 20)) (.cse8 (= |ULTIMATE.start_main_~a~0#1| .cse9))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 (= |ULTIMATE.start_main_~r~0#1| 0) (= |ULTIMATE.start_main_~q~0#1| 0) .cse5 .cse6 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|) .cse7 (= (+ (* |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~b~0#1|) |ULTIMATE.start_main_~c~0#1|) |ULTIMATE.start_main_~a~0#1|) .cse8 (= |ULTIMATE.start_main_~s~0#1| 1)) (and (< 0 |ULTIMATE.start_main_~b~0#1|) .cse0 .cse1 .cse2 .cse3 .cse4 (= .cse9 (+ |ULTIMATE.start_main_~c~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~s~0#1|) (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~q~0#1|))) .cse5 .cse6 (< |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~a~0#1|) .cse7 .cse8)))) [2021-11-20 06:47:56,373 INFO L858 garLoopResultBuilder]: For program point L42(lines 42 43) no Hoare annotation was computed. [2021-11-20 06:47:56,373 INFO L854 garLoopResultBuilder]: At program point L71(line 71) the Hoare annotation is: (and (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= 1 |ULTIMATE.start_main_~x~0#1|) (= |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|)))) [2021-11-20 06:47:56,373 INFO L854 garLoopResultBuilder]: At program point L38(line 38) the Hoare annotation is: (and (= |ULTIMATE.start_main_~yy~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~xy~0#1|) (= |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|))) (<= 1 |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~r~0#1| 0) (= |ULTIMATE.start_main_~q~0#1| 0) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~y~0#1| 20) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 20) (= |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|))) (= |ULTIMATE.start_main_~s~0#1| 1)) [2021-11-20 06:47:56,373 INFO L854 garLoopResultBuilder]: At program point L38-1(line 38) the Hoare annotation is: (and (= |ULTIMATE.start_main_~yy~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~xy~0#1|) (= |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|))) (<= 1 |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~r~0#1| 0) (= |ULTIMATE.start_main_~q~0#1| 0) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~y~0#1| 20) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 20) (= |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|))) (= |ULTIMATE.start_main_~s~0#1| 1)) [2021-11-20 06:47:56,373 INFO L858 garLoopResultBuilder]: For program point L26(line 26) no Hoare annotation was computed. [2021-11-20 06:47:56,373 INFO L861 garLoopResultBuilder]: At program point L22(line 22) the Hoare annotation is: true [2021-11-20 06:47:56,373 INFO L858 garLoopResultBuilder]: For program point L22-1(line 22) no Hoare annotation was computed. [2021-11-20 06:47:56,374 INFO L858 garLoopResultBuilder]: For program point L51(lines 47 56) no Hoare annotation was computed. [2021-11-20 06:47:56,374 INFO L854 garLoopResultBuilder]: At program point L47-2(lines 47 56) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~yy~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (.cse1 (<= 1 |ULTIMATE.start_main_~y~0#1|)) (.cse2 (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~xy~0#1|)) (.cse3 (= |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|)))) (.cse4 (<= 0 |ULTIMATE.start_main_~c~0#1|)) (.cse5 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse6 (<= |ULTIMATE.start_main_~y~0#1| 20)) (.cse7 (<= |ULTIMATE.start_main_~x~0#1| 20)) (.cse8 (= (+ (* |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~b~0#1|) |ULTIMATE.start_main_~c~0#1|) |ULTIMATE.start_main_~a~0#1|)) (.cse9 (= |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|))))) (or (and (< 0 |ULTIMATE.start_main_~b~0#1|) .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 (< |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~a~0#1|) .cse7 .cse8 .cse9) (and .cse0 .cse1 .cse2 .cse3 .cse4 (= |ULTIMATE.start_main_~r~0#1| 0) (= |ULTIMATE.start_main_~q~0#1| 0) .cse5 .cse6 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|) .cse7 .cse8 .cse9 (= |ULTIMATE.start_main_~s~0#1| 1)))) [2021-11-20 06:47:56,374 INFO L858 garLoopResultBuilder]: For program point L47-3(lines 47 56) no Hoare annotation was computed. [2021-11-20 06:47:56,374 INFO L858 garLoopResultBuilder]: For program point L72(line 72) no Hoare annotation was computed. [2021-11-20 06:47:56,374 INFO L861 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2021-11-20 06:47:56,374 INFO L858 garLoopResultBuilder]: For program point L8(line 8) no Hoare annotation was computed. [2021-11-20 06:47:56,375 INFO L858 garLoopResultBuilder]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2021-11-20 06:47:56,375 INFO L858 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2021-11-20 06:47:56,375 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 10 16) the Hoare annotation is: true [2021-11-20 06:47:56,375 INFO L858 garLoopResultBuilder]: For program point L12(lines 12 13) no Hoare annotation was computed. [2021-11-20 06:47:56,375 INFO L858 garLoopResultBuilder]: For program point L11(lines 11 14) no Hoare annotation was computed. [2021-11-20 06:47:56,375 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 10 16) no Hoare annotation was computed. [2021-11-20 06:47:56,376 INFO L858 garLoopResultBuilder]: For program point L11-2(lines 10 16) no Hoare annotation was computed. [2021-11-20 06:47:56,376 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-11-20 06:47:56,379 INFO L732 BasicCegarLoop]: Path program histogram: [6, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:47:56,381 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-20 06:47:56,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 06:47:56 BoogieIcfgContainer [2021-11-20 06:47:56,399 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-20 06:47:56,399 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-20 06:47:56,399 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-20 06:47:56,400 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-20 06:47:56,400 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:39:08" (3/4) ... [2021-11-20 06:47:56,403 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-20 06:47:56,410 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2021-11-20 06:47:56,410 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-11-20 06:47:56,415 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-11-20 06:47:56,416 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-11-20 06:47:56,416 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-20 06:47:56,416 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-20 06:47:56,459 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/witness.graphml [2021-11-20 06:47:56,459 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-20 06:47:56,460 INFO L158 Benchmark]: Toolchain (without parser) took 529108.37ms. Allocated memory was 81.8MB in the beginning and 226.5MB in the end (delta: 144.7MB). Free memory was 43.4MB in the beginning and 160.6MB in the end (delta: -117.2MB). Peak memory consumption was 28.6MB. Max. memory is 16.1GB. [2021-11-20 06:47:56,460 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 81.8MB. Free memory was 59.9MB in the beginning and 59.8MB in the end (delta: 69.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 06:47:56,461 INFO L158 Benchmark]: CACSL2BoogieTranslator took 327.69ms. Allocated memory was 81.8MB in the beginning and 107.0MB in the end (delta: 25.2MB). Free memory was 43.2MB in the beginning and 78.1MB in the end (delta: -34.9MB). Peak memory consumption was 4.1MB. Max. memory is 16.1GB. [2021-11-20 06:47:56,461 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.06ms. Allocated memory is still 107.0MB. Free memory was 78.1MB in the beginning and 76.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 06:47:56,461 INFO L158 Benchmark]: Boogie Preprocessor took 23.82ms. Allocated memory is still 107.0MB. Free memory was 76.5MB in the beginning and 75.3MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 06:47:56,462 INFO L158 Benchmark]: RCFGBuilder took 374.53ms. Allocated memory is still 107.0MB. Free memory was 75.3MB in the beginning and 64.9MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-20 06:47:56,462 INFO L158 Benchmark]: TraceAbstraction took 528268.42ms. Allocated memory was 107.0MB in the beginning and 226.5MB in the end (delta: 119.5MB). Free memory was 64.5MB in the beginning and 163.8MB in the end (delta: -99.2MB). Peak memory consumption was 123.0MB. Max. memory is 16.1GB. [2021-11-20 06:47:56,463 INFO L158 Benchmark]: Witness Printer took 60.06ms. Allocated memory is still 226.5MB. Free memory was 163.8MB in the beginning and 160.6MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 06:47:56,465 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 81.8MB. Free memory was 59.9MB in the beginning and 59.8MB in the end (delta: 69.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 327.69ms. Allocated memory was 81.8MB in the beginning and 107.0MB in the end (delta: 25.2MB). Free memory was 43.2MB in the beginning and 78.1MB in the end (delta: -34.9MB). Peak memory consumption was 4.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.06ms. Allocated memory is still 107.0MB. Free memory was 78.1MB in the beginning and 76.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 23.82ms. Allocated memory is still 107.0MB. Free memory was 76.5MB in the beginning and 75.3MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 374.53ms. Allocated memory is still 107.0MB. Free memory was 75.3MB in the beginning and 64.9MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 528268.42ms. Allocated memory was 107.0MB in the beginning and 226.5MB in the end (delta: 119.5MB). Free memory was 64.5MB in the beginning and 163.8MB in the end (delta: -99.2MB). Peak memory consumption was 123.0MB. Max. memory is 16.1GB. * Witness Printer took 60.06ms. Allocated memory is still 226.5MB. Free memory was 163.8MB in the beginning and 160.6MB 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, 35 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 528.2s, OverallIterations: 19, TraceHistogramMax: 32, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.1s, AutomataDifference: 105.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 290.6s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 696 SdHoareTripleChecker+Valid, 37.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 591 mSDsluCounter, 6143 SdHoareTripleChecker+Invalid, 36.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 16 IncrementalHoareTripleChecker+Unchecked, 5310 mSDsCounter, 1013 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7859 IncrementalHoareTripleChecker+Invalid, 8890 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1013 mSolverCounterUnsat, 833 mSDtfsCounter, 7859 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2927 GetRequests, 2522 SyntacticMatches, 27 SemanticMatches, 378 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2484 ImplicationChecksByTransitivity, 131.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=426occurred in iteration=18, InterpolantAutomatonStates: 264, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.1s AutomataMinimizationTime, 19 MinimizatonAttempts, 211 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 17 LocationsWithAnnotation, 227 PreInvPairs, 448 NumberOfFragments, 935 HoareAnnotationTreeSize, 227 FomulaSimplifications, 30581 FormulaSimplificationTreeSizeReduction, 5.5s HoareSimplificationTime, 17 FomulaSimplificationsInter, 117382 FormulaSimplificationTreeSizeReductionInter, 285.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 9.0s SatisfiabilityAnalysisTime, 116.9s InterpolantComputationTime, 1931 NumberOfCodeBlocks, 1636 NumberOfCodeBlocksAsserted, 40 NumberOfCheckSat, 2593 ConstructedInterpolants, 2 QuantifiedInterpolants, 18626 SizeOfPredicates, 139 NumberOfNonLiveVariables, 3953 ConjunctsInSsa, 687 ConjunctsInUnsatCore, 28 InterpolantComputations, 5 PerfectInterpolantSequences, 10896/11979 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: 47]: Loop Invariant Derived loop invariant: (((((((((((0 < b && yy == y * y) && 1 <= y) && y * x == xy) && b == x * q + y * s) && 0 <= c) && 1 <= x) && y <= 20) && b < a) && x <= 20) && k * b + c == a) && a == x * p + y * r) || (((((((((((((yy == y * y && 1 <= y) && y * x == xy) && b == x * q + y * s) && 0 <= c) && r == 0) && q == 0) && 1 <= x) && y <= 20) && a == x) && x <= 20) && k * b + c == a) && a == x * p + y * r) && s == 1) - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 39]: Loop Invariant Derived loop invariant: ((((((((((((b <= c || !(c == 0)) || k * x * q + y * k * s == x * p + y * r) && 0 <= b) && yy == y * y) && 1 <= y) && y * x == xy) && b == x * q + y * s) && 1 <= x) && y <= 20) && b < a) && x <= 20) && a == x * p + y * r) || (((((((((((yy == y * y && y * x == xy) && b == x * q + y * s) && 1 <= b) && r == 0) && q == 0) && 1 <= x) && y <= 20) && a == x) && x <= 20) && a == x * p + y * r) && s == 1) RESULT: Ultimate proved your program to be correct! [2021-11-20 06:47:56,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd7cbde-886a-4aa4-b263-e73cf71f216e/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE