./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt --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 b0a100c456654412ca82e52238a96db2d4693b3d ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-12 23:59:07,684 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-12 23:59:07,687 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-12 23:59:07,741 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-12 23:59:07,742 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-12 23:59:07,745 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-12 23:59:07,747 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-12 23:59:07,751 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-12 23:59:07,754 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-12 23:59:07,759 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-12 23:59:07,761 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-12 23:59:07,763 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-12 23:59:07,763 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-12 23:59:07,766 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-12 23:59:07,768 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-12 23:59:07,777 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-12 23:59:07,779 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-12 23:59:07,780 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-12 23:59:07,782 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-12 23:59:07,788 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-12 23:59:07,790 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-12 23:59:07,792 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-12 23:59:07,793 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-12 23:59:07,794 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-12 23:59:07,799 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-12 23:59:07,799 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-12 23:59:07,800 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-12 23:59:07,805 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-12 23:59:07,805 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-12 23:59:07,806 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-12 23:59:07,807 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-12 23:59:07,808 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-12 23:59:07,810 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-12 23:59:07,812 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-12 23:59:07,813 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-12 23:59:07,815 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-12 23:59:07,816 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-12 23:59:07,816 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-12 23:59:07,817 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-12 23:59:07,818 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-12 23:59:07,818 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-12 23:59:07,819 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-12 23:59:07,854 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-12 23:59:07,856 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-12 23:59:07,857 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-12 23:59:07,857 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-12 23:59:07,863 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-12 23:59:07,865 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-12 23:59:07,866 INFO L138 SettingsManager]: * Use SBE=true [2021-10-12 23:59:07,866 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-12 23:59:07,866 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-12 23:59:07,867 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-12 23:59:07,868 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-12 23:59:07,868 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-12 23:59:07,868 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-12 23:59:07,868 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-12 23:59:07,869 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-12 23:59:07,869 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-12 23:59:07,869 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-12 23:59:07,869 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-12 23:59:07,869 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-12 23:59:07,870 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-12 23:59:07,870 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-12 23:59:07,870 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-12 23:59:07,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-12 23:59:07,871 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-12 23:59:07,871 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-12 23:59:07,871 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-12 23:59:07,871 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-12 23:59:07,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-12 23:59:07,872 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-12 23:59:07,873 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-12 23:59:07,874 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_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b0a100c456654412ca82e52238a96db2d4693b3d [2021-10-12 23:59:08,170 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-12 23:59:08,205 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-12 23:59:08,208 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-12 23:59:08,209 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-12 23:59:08,210 INFO L275 PluginConnector]: CDTParser initialized [2021-10-12 23:59:08,211 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound10.c [2021-10-12 23:59:08,292 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/data/9285c60f3/08192b02171049b5943a36c6695c917a/FLAG19215a1cb [2021-10-12 23:59:08,743 INFO L306 CDTParser]: Found 1 translation units. [2021-10-12 23:59:08,744 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound10.c [2021-10-12 23:59:08,750 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/data/9285c60f3/08192b02171049b5943a36c6695c917a/FLAG19215a1cb [2021-10-12 23:59:09,125 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/data/9285c60f3/08192b02171049b5943a36c6695c917a [2021-10-12 23:59:09,127 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-12 23:59:09,128 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-12 23:59:09,132 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-12 23:59:09,133 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-12 23:59:09,151 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-12 23:59:09,152 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 11:59:09" (1/1) ... [2021-10-12 23:59:09,153 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@281bfa2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:09, skipping insertion in model container [2021-10-12 23:59:09,153 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 11:59:09" (1/1) ... [2021-10-12 23:59:09,160 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-12 23:59:09,179 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-12 23:59:09,402 WARN L228 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_84659628-447b-4457-8edf-39c0f9c0cce7/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound10.c[490,503] [2021-10-12 23:59:09,439 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-12 23:59:09,451 INFO L203 MainTranslator]: Completed pre-run [2021-10-12 23:59:09,465 WARN L228 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_84659628-447b-4457-8edf-39c0f9c0cce7/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound10.c[490,503] [2021-10-12 23:59:09,494 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-12 23:59:09,513 INFO L208 MainTranslator]: Completed translation [2021-10-12 23:59:09,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:09 WrapperNode [2021-10-12 23:59:09,514 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-12 23:59:09,515 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-12 23:59:09,515 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-12 23:59:09,515 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-12 23:59:09,522 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:09" (1/1) ... [2021-10-12 23:59:09,543 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:09" (1/1) ... [2021-10-12 23:59:09,564 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-12 23:59:09,565 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-12 23:59:09,565 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-12 23:59:09,566 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-12 23:59:09,573 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:09" (1/1) ... [2021-10-12 23:59:09,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:09" (1/1) ... [2021-10-12 23:59:09,576 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:09" (1/1) ... [2021-10-12 23:59:09,576 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:09" (1/1) ... [2021-10-12 23:59:09,581 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:09" (1/1) ... [2021-10-12 23:59:09,587 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:09" (1/1) ... [2021-10-12 23:59:09,588 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:09" (1/1) ... [2021-10-12 23:59:09,591 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-12 23:59:09,592 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-12 23:59:09,592 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-12 23:59:09,592 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-12 23:59:09,593 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:09" (1/1) ... [2021-10-12 23:59:09,609 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-12 23:59:09,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:09,632 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-12 23:59:09,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-12 23:59:09,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-12 23:59:09,682 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-12 23:59:09,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-12 23:59:09,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-12 23:59:09,923 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-12 23:59:09,923 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2021-10-12 23:59:09,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 11:59:09 BoogieIcfgContainer [2021-10-12 23:59:09,925 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-12 23:59:09,927 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-12 23:59:09,927 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-12 23:59:09,930 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-12 23:59:09,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 11:59:09" (1/3) ... [2021-10-12 23:59:09,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58b59753 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 11:59:09, skipping insertion in model container [2021-10-12 23:59:09,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:09" (2/3) ... [2021-10-12 23:59:09,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58b59753 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 11:59:09, skipping insertion in model container [2021-10-12 23:59:09,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 11:59:09" (3/3) ... [2021-10-12 23:59:09,933 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound10.c [2021-10-12 23:59:09,938 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-12 23:59:09,938 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-10-12 23:59:10,001 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-12 23:59:10,008 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-10-12 23:59:10,008 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-10-12 23:59:10,038 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 39 states have internal predecessors, (55), 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) [2021-10-12 23:59:10,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-12 23:59:10,042 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:10,043 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:10,048 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-12 23:59:10,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:10,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1233339761, now seen corresponding path program 1 times [2021-10-12 23:59:10,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:10,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493429657] [2021-10-12 23:59:10,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:10,064 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:10,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:10,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:10,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:10,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493429657] [2021-10-12 23:59:10,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493429657] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:10,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:10,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-12 23:59:10,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376648575] [2021-10-12 23:59:10,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-12 23:59:10,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:10,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-12 23:59:10,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-12 23:59:10,249 INFO L87 Difference]: Start difference. First operand has 40 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 39 states have internal predecessors, (55), 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) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2021-10-12 23:59:10,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:10,268 INFO L93 Difference]: Finished difference Result 77 states and 106 transitions. [2021-10-12 23:59:10,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-12 23:59:10,269 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) Word has length 10 [2021-10-12 23:59:10,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:10,277 INFO L225 Difference]: With dead ends: 77 [2021-10-12 23:59:10,277 INFO L226 Difference]: Without dead ends: 36 [2021-10-12 23:59:10,280 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-12 23:59:10,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-12 23:59:10,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-10-12 23:59:10,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 35 states have internal predecessors, (41), 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) [2021-10-12 23:59:10,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-10-12 23:59:10,309 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 10 [2021-10-12 23:59:10,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:10,309 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-10-12 23:59:10,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2021-10-12 23:59:10,310 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-10-12 23:59:10,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-12 23:59:10,310 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:10,311 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:10,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-12 23:59:10,311 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-12 23:59:10,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:10,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1507359540, now seen corresponding path program 1 times [2021-10-12 23:59:10,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:10,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132944682] [2021-10-12 23:59:10,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:10,313 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:10,341 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-12 23:59:10,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1676534289] [2021-10-12 23:59:10,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:10,343 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:10,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:10,347 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:10,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-12 23:59:10,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:10,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-12 23:59:10,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:10,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:10,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:10,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132944682] [2021-10-12 23:59:10,557 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-12 23:59:10,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676534289] [2021-10-12 23:59:10,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676534289] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:10,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:10,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-12 23:59:10,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969944947] [2021-10-12 23:59:10,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-12 23:59:10,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:10,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-12 23:59:10,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-12 23:59:10,566 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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) [2021-10-12 23:59:10,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:10,604 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-10-12 23:59:10,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-12 23:59:10,605 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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) Word has length 11 [2021-10-12 23:59:10,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:10,607 INFO L225 Difference]: With dead ends: 42 [2021-10-12 23:59:10,607 INFO L226 Difference]: Without dead ends: 38 [2021-10-12 23:59:10,608 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-12 23:59:10,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-12 23:59:10,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-10-12 23:59:10,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.303030303030303) internal successors, (43), 37 states have internal predecessors, (43), 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) [2021-10-12 23:59:10,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2021-10-12 23:59:10,615 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 11 [2021-10-12 23:59:10,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:10,615 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2021-10-12 23:59:10,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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) [2021-10-12 23:59:10,616 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2021-10-12 23:59:10,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-12 23:59:10,616 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:10,617 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:10,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:10,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:10,842 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-12 23:59:10,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:10,842 INFO L82 PathProgramCache]: Analyzing trace with hash 515746917, now seen corresponding path program 1 times [2021-10-12 23:59:10,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:10,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022452806] [2021-10-12 23:59:10,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:10,843 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:10,868 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-12 23:59:10,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [922651505] [2021-10-12 23:59:10,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:10,869 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:10,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:10,870 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:10,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-12 23:59:10,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:10,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-12 23:59:10,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:11,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:11,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:11,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022452806] [2021-10-12 23:59:11,037 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-12 23:59:11,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922651505] [2021-10-12 23:59:11,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922651505] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:11,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:11,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-12 23:59:11,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738006398] [2021-10-12 23:59:11,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-12 23:59:11,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:11,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-12 23:59:11,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-12 23:59:11,040 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2021-10-12 23:59:11,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:11,124 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2021-10-12 23:59:11,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-12 23:59:11,124 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) Word has length 12 [2021-10-12 23:59:11,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:11,126 INFO L225 Difference]: With dead ends: 66 [2021-10-12 23:59:11,126 INFO L226 Difference]: Without dead ends: 62 [2021-10-12 23:59:11,126 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-12 23:59:11,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-12 23:59:11,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 39. [2021-10-12 23:59:11,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 38 states have internal predecessors, (44), 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) [2021-10-12 23:59:11,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2021-10-12 23:59:11,134 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 12 [2021-10-12 23:59:11,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:11,134 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2021-10-12 23:59:11,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2021-10-12 23:59:11,134 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2021-10-12 23:59:11,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-12 23:59:11,135 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:11,135 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:11,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:11,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:11,350 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-12 23:59:11,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:11,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1270616931, now seen corresponding path program 1 times [2021-10-12 23:59:11,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:11,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957573588] [2021-10-12 23:59:11,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:11,351 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:11,373 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-12 23:59:11,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [52712123] [2021-10-12 23:59:11,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:11,374 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:11,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:11,375 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:11,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-12 23:59:11,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:11,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-12 23:59:11,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:11,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:11,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:11,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957573588] [2021-10-12 23:59:11,705 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-12 23:59:11,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52712123] [2021-10-12 23:59:11,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52712123] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:11,706 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:11,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-12 23:59:11,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412001827] [2021-10-12 23:59:11,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-12 23:59:11,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:11,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-12 23:59:11,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-12 23:59:11,709 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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) [2021-10-12 23:59:11,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:11,827 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2021-10-12 23:59:11,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-12 23:59:11,828 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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) Word has length 16 [2021-10-12 23:59:11,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:11,829 INFO L225 Difference]: With dead ends: 62 [2021-10-12 23:59:11,829 INFO L226 Difference]: Without dead ends: 60 [2021-10-12 23:59:11,830 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 105.9ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-10-12 23:59:11,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-12 23:59:11,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 53. [2021-10-12 23:59:11,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 52 states have internal predecessors, (65), 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) [2021-10-12 23:59:11,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2021-10-12 23:59:11,839 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 16 [2021-10-12 23:59:11,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:11,839 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2021-10-12 23:59:11,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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) [2021-10-12 23:59:11,840 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2021-10-12 23:59:11,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-12 23:59:11,840 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:11,841 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:11,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:12,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:12,066 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-12 23:59:12,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:12,066 INFO L82 PathProgramCache]: Analyzing trace with hash -648504839, now seen corresponding path program 1 times [2021-10-12 23:59:12,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:12,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405819553] [2021-10-12 23:59:12,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:12,067 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:12,090 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-12 23:59:12,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [399178219] [2021-10-12 23:59:12,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:12,091 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:12,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:12,102 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:12,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-12 23:59:12,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:12,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-12 23:59:12,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:12,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:12,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:12,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405819553] [2021-10-12 23:59:12,281 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-12 23:59:12,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399178219] [2021-10-12 23:59:12,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399178219] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:12,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:12,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-12 23:59:12,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373190632] [2021-10-12 23:59:12,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-12 23:59:12,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:12,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-12 23:59:12,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-12 23:59:12,288 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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) [2021-10-12 23:59:12,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:12,331 INFO L93 Difference]: Finished difference Result 85 states and 103 transitions. [2021-10-12 23:59:12,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-12 23:59:12,333 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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) Word has length 17 [2021-10-12 23:59:12,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:12,335 INFO L225 Difference]: With dead ends: 85 [2021-10-12 23:59:12,337 INFO L226 Difference]: Without dead ends: 55 [2021-10-12 23:59:12,338 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 9.0ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-12 23:59:12,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-10-12 23:59:12,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-10-12 23:59:12,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.34) internal successors, (67), 54 states have internal predecessors, (67), 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) [2021-10-12 23:59:12,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2021-10-12 23:59:12,355 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 17 [2021-10-12 23:59:12,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:12,356 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2021-10-12 23:59:12,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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) [2021-10-12 23:59:12,356 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2021-10-12 23:59:12,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-12 23:59:12,357 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:12,358 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:12,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:12,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:12,575 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-12 23:59:12,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:12,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1354097033, now seen corresponding path program 1 times [2021-10-12 23:59:12,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:12,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977640423] [2021-10-12 23:59:12,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:12,576 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:12,605 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-12 23:59:12,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1850917193] [2021-10-12 23:59:12,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:12,610 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:12,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:12,612 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:12,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-12 23:59:12,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:12,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-12 23:59:12,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:12,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:12,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:12,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977640423] [2021-10-12 23:59:12,787 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-12 23:59:12,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850917193] [2021-10-12 23:59:12,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850917193] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:12,788 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-12 23:59:12,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-12 23:59:12,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634330915] [2021-10-12 23:59:12,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-12 23:59:12,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:12,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-12 23:59:12,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-12 23:59:12,791 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 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) [2021-10-12 23:59:12,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:12,826 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2021-10-12 23:59:12,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-12 23:59:12,827 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 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) Word has length 18 [2021-10-12 23:59:12,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:12,828 INFO L225 Difference]: With dead ends: 64 [2021-10-12 23:59:12,829 INFO L226 Difference]: Without dead ends: 60 [2021-10-12 23:59:12,829 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 16.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-12 23:59:12,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-12 23:59:12,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-10-12 23:59:12,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.3333333333333333) internal successors, (72), 58 states have internal predecessors, (72), 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) [2021-10-12 23:59:12,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2021-10-12 23:59:12,849 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 18 [2021-10-12 23:59:12,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:12,849 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2021-10-12 23:59:12,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 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) [2021-10-12 23:59:12,850 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2021-10-12 23:59:12,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-12 23:59:12,850 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:12,850 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:12,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:13,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:13,051 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-12 23:59:13,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:13,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1292001664, now seen corresponding path program 1 times [2021-10-12 23:59:13,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:13,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400915817] [2021-10-12 23:59:13,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:13,052 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:13,066 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-12 23:59:13,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1487909298] [2021-10-12 23:59:13,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:13,067 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:13,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:13,068 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:13,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-12 23:59:13,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:13,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-12 23:59:13,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:13,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:13,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:13,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400915817] [2021-10-12 23:59:13,474 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-12 23:59:13,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487909298] [2021-10-12 23:59:13,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487909298] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:13,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:13,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-12 23:59:13,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335392166] [2021-10-12 23:59:13,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-12 23:59:13,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:13,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-12 23:59:13,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-12 23:59:13,479 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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) [2021-10-12 23:59:13,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:13,802 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2021-10-12 23:59:13,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-12 23:59:13,803 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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) Word has length 18 [2021-10-12 23:59:13,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:13,803 INFO L225 Difference]: With dead ends: 82 [2021-10-12 23:59:13,804 INFO L226 Difference]: Without dead ends: 80 [2021-10-12 23:59:13,804 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 262.1ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-10-12 23:59:13,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-12 23:59:13,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 59. [2021-10-12 23:59:13,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.3148148148148149) internal successors, (71), 58 states have internal predecessors, (71), 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) [2021-10-12 23:59:13,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2021-10-12 23:59:13,814 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 18 [2021-10-12 23:59:13,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:13,816 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2021-10-12 23:59:13,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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) [2021-10-12 23:59:13,816 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2021-10-12 23:59:13,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-12 23:59:13,817 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:13,817 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:13,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:14,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:14,033 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-12 23:59:14,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:14,039 INFO L82 PathProgramCache]: Analyzing trace with hash 971917338, now seen corresponding path program 1 times [2021-10-12 23:59:14,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:14,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720492044] [2021-10-12 23:59:14,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:14,041 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:14,082 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-12 23:59:14,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1995377280] [2021-10-12 23:59:14,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:14,083 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:14,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:14,084 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:14,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-12 23:59:14,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:14,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-12 23:59:14,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:14,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:14,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:14,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720492044] [2021-10-12 23:59:14,291 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-12 23:59:14,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995377280] [2021-10-12 23:59:14,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995377280] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:14,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-12 23:59:14,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-12 23:59:14,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181522492] [2021-10-12 23:59:14,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-12 23:59:14,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:14,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-12 23:59:14,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-12 23:59:14,294 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 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) [2021-10-12 23:59:14,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:14,481 INFO L93 Difference]: Finished difference Result 191 states and 227 transitions. [2021-10-12 23:59:14,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-12 23:59:14,482 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 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) Word has length 19 [2021-10-12 23:59:14,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:14,485 INFO L225 Difference]: With dead ends: 191 [2021-10-12 23:59:14,485 INFO L226 Difference]: Without dead ends: 187 [2021-10-12 23:59:14,485 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 78.4ms TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-10-12 23:59:14,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-10-12 23:59:14,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 91. [2021-10-12 23:59:14,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.3837209302325582) internal successors, (119), 90 states have internal predecessors, (119), 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) [2021-10-12 23:59:14,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 119 transitions. [2021-10-12 23:59:14,515 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 119 transitions. Word has length 19 [2021-10-12 23:59:14,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:14,515 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 119 transitions. [2021-10-12 23:59:14,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 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) [2021-10-12 23:59:14,515 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 119 transitions. [2021-10-12 23:59:14,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-12 23:59:14,517 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:14,518 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:14,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:14,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-10-12 23:59:14,737 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-12 23:59:14,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:14,738 INFO L82 PathProgramCache]: Analyzing trace with hash -367893245, now seen corresponding path program 1 times [2021-10-12 23:59:14,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:14,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234697172] [2021-10-12 23:59:14,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:14,738 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:14,751 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-12 23:59:14,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [191306331] [2021-10-12 23:59:14,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:14,751 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:14,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:14,752 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:14,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-12 23:59:14,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:14,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-12 23:59:14,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:15,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:15,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:15,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234697172] [2021-10-12 23:59:15,083 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-12 23:59:15,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191306331] [2021-10-12 23:59:15,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191306331] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:15,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:15,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-12 23:59:15,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735942181] [2021-10-12 23:59:15,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-12 23:59:15,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:15,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-12 23:59:15,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-12 23:59:15,086 INFO L87 Difference]: Start difference. First operand 91 states and 119 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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) [2021-10-12 23:59:15,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:15,235 INFO L93 Difference]: Finished difference Result 111 states and 139 transitions. [2021-10-12 23:59:15,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-12 23:59:15,235 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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) Word has length 20 [2021-10-12 23:59:15,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:15,237 INFO L225 Difference]: With dead ends: 111 [2021-10-12 23:59:15,237 INFO L226 Difference]: Without dead ends: 109 [2021-10-12 23:59:15,237 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 97.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-10-12 23:59:15,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-10-12 23:59:15,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 101. [2021-10-12 23:59:15,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.375) internal successors, (132), 100 states have internal predecessors, (132), 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) [2021-10-12 23:59:15,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 132 transitions. [2021-10-12 23:59:15,249 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 132 transitions. Word has length 20 [2021-10-12 23:59:15,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:15,249 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 132 transitions. [2021-10-12 23:59:15,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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) [2021-10-12 23:59:15,250 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 132 transitions. [2021-10-12 23:59:15,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-12 23:59:15,254 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:15,254 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:15,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:15,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:15,482 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-12 23:59:15,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:15,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1357932506, now seen corresponding path program 1 times [2021-10-12 23:59:15,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:15,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567747641] [2021-10-12 23:59:15,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:15,483 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:15,496 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-12 23:59:15,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1415155444] [2021-10-12 23:59:15,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:15,497 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:15,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:15,498 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:15,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-12 23:59:15,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:15,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-12 23:59:15,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:15,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:15,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:15,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567747641] [2021-10-12 23:59:15,731 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-12 23:59:15,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415155444] [2021-10-12 23:59:15,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415155444] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:15,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:15,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-12 23:59:15,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089321051] [2021-10-12 23:59:15,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-12 23:59:15,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:15,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-12 23:59:15,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-12 23:59:15,733 INFO L87 Difference]: Start difference. First operand 101 states and 132 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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) [2021-10-12 23:59:15,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:15,811 INFO L93 Difference]: Finished difference Result 226 states and 307 transitions. [2021-10-12 23:59:15,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-12 23:59:15,812 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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) Word has length 22 [2021-10-12 23:59:15,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:15,815 INFO L225 Difference]: With dead ends: 226 [2021-10-12 23:59:15,815 INFO L226 Difference]: Without dead ends: 224 [2021-10-12 23:59:15,816 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-12 23:59:15,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-10-12 23:59:15,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 137. [2021-10-12 23:59:15,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.356060606060606) internal successors, (179), 136 states have internal predecessors, (179), 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) [2021-10-12 23:59:15,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 179 transitions. [2021-10-12 23:59:15,833 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 179 transitions. Word has length 22 [2021-10-12 23:59:15,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:15,834 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 179 transitions. [2021-10-12 23:59:15,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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) [2021-10-12 23:59:15,834 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 179 transitions. [2021-10-12 23:59:15,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-12 23:59:15,836 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:15,836 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:15,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:16,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-12 23:59:16,062 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-12 23:59:16,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:16,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1235592658, now seen corresponding path program 1 times [2021-10-12 23:59:16,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:16,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726324997] [2021-10-12 23:59:16,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:16,062 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:16,074 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-12 23:59:16,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [856913572] [2021-10-12 23:59:16,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:16,075 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:16,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:16,076 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:16,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-12 23:59:16,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:16,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-12 23:59:16,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:16,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:16,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:16,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726324997] [2021-10-12 23:59:16,502 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-12 23:59:16,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856913572] [2021-10-12 23:59:16,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856913572] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:16,503 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-12 23:59:16,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-12 23:59:16,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062224360] [2021-10-12 23:59:16,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-12 23:59:16,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:16,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-12 23:59:16,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-12 23:59:16,504 INFO L87 Difference]: Start difference. First operand 137 states and 179 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 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) [2021-10-12 23:59:16,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:16,634 INFO L93 Difference]: Finished difference Result 210 states and 273 transitions. [2021-10-12 23:59:16,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-12 23:59:16,635 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 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) Word has length 23 [2021-10-12 23:59:16,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:16,637 INFO L225 Difference]: With dead ends: 210 [2021-10-12 23:59:16,637 INFO L226 Difference]: Without dead ends: 208 [2021-10-12 23:59:16,637 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 61.1ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-12 23:59:16,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-10-12 23:59:16,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 191. [2021-10-12 23:59:16,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.381720430107527) internal successors, (257), 190 states have internal predecessors, (257), 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) [2021-10-12 23:59:16,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 257 transitions. [2021-10-12 23:59:16,656 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 257 transitions. Word has length 23 [2021-10-12 23:59:16,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:16,657 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 257 transitions. [2021-10-12 23:59:16,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 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) [2021-10-12 23:59:16,657 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 257 transitions. [2021-10-12 23:59:16,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-12 23:59:16,658 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:16,658 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:16,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:16,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-12 23:59:16,873 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-12 23:59:16,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:16,874 INFO L82 PathProgramCache]: Analyzing trace with hash -138249927, now seen corresponding path program 1 times [2021-10-12 23:59:16,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:16,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045511203] [2021-10-12 23:59:16,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:16,874 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:16,906 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-12 23:59:16,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [702092455] [2021-10-12 23:59:16,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:16,912 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:16,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:16,914 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:16,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-12 23:59:17,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:17,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-12 23:59:17,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:17,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:17,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:17,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045511203] [2021-10-12 23:59:17,169 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-12 23:59:17,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702092455] [2021-10-12 23:59:17,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702092455] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:17,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:17,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-12 23:59:17,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140772039] [2021-10-12 23:59:17,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-12 23:59:17,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:17,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-12 23:59:17,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-12 23:59:17,171 INFO L87 Difference]: Start difference. First operand 191 states and 257 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 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) [2021-10-12 23:59:17,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:17,206 INFO L93 Difference]: Finished difference Result 280 states and 375 transitions. [2021-10-12 23:59:17,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-12 23:59:17,207 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 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) Word has length 23 [2021-10-12 23:59:17,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:17,208 INFO L225 Difference]: With dead ends: 280 [2021-10-12 23:59:17,208 INFO L226 Difference]: Without dead ends: 191 [2021-10-12 23:59:17,210 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 13.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-12 23:59:17,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-10-12 23:59:17,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2021-10-12 23:59:17,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.3763440860215055) internal successors, (256), 190 states have internal predecessors, (256), 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) [2021-10-12 23:59:17,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 256 transitions. [2021-10-12 23:59:17,228 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 256 transitions. Word has length 23 [2021-10-12 23:59:17,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:17,228 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 256 transitions. [2021-10-12 23:59:17,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 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) [2021-10-12 23:59:17,229 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 256 transitions. [2021-10-12 23:59:17,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-12 23:59:17,232 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:17,232 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:17,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:17,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:17,451 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-12 23:59:17,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:17,451 INFO L82 PathProgramCache]: Analyzing trace with hash -265418908, now seen corresponding path program 1 times [2021-10-12 23:59:17,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:17,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139457993] [2021-10-12 23:59:17,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:17,452 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:17,463 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-12 23:59:17,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1960859737] [2021-10-12 23:59:17,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:17,463 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:17,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:17,464 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:17,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-12 23:59:17,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:17,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-12 23:59:17,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:17,721 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:17,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:17,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139457993] [2021-10-12 23:59:17,722 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-12 23:59:17,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960859737] [2021-10-12 23:59:17,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960859737] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:17,722 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-12 23:59:17,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-12 23:59:17,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520108056] [2021-10-12 23:59:17,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-12 23:59:17,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:17,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-12 23:59:17,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-12 23:59:17,724 INFO L87 Difference]: Start difference. First operand 191 states and 256 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 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) [2021-10-12 23:59:17,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:17,777 INFO L93 Difference]: Finished difference Result 303 states and 411 transitions. [2021-10-12 23:59:17,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-12 23:59:17,777 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 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) Word has length 24 [2021-10-12 23:59:17,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:17,779 INFO L225 Difference]: With dead ends: 303 [2021-10-12 23:59:17,779 INFO L226 Difference]: Without dead ends: 196 [2021-10-12 23:59:17,780 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 21.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-12 23:59:17,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-10-12 23:59:17,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2021-10-12 23:59:17,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.368421052631579) internal successors, (260), 194 states have internal predecessors, (260), 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) [2021-10-12 23:59:17,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 260 transitions. [2021-10-12 23:59:17,797 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 260 transitions. Word has length 24 [2021-10-12 23:59:17,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:17,797 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 260 transitions. [2021-10-12 23:59:17,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 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) [2021-10-12 23:59:17,797 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 260 transitions. [2021-10-12 23:59:17,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-12 23:59:17,798 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:17,798 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:17,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:18,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-12 23:59:18,018 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-12 23:59:18,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:18,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1931632236, now seen corresponding path program 2 times [2021-10-12 23:59:18,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:18,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806332863] [2021-10-12 23:59:18,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:18,019 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:18,034 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-12 23:59:18,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [982820388] [2021-10-12 23:59:18,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-12 23:59:18,035 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:18,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:18,036 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:18,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-12 23:59:18,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-12 23:59:18,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-12 23:59:18,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-12 23:59:18,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:18,350 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:18,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:18,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806332863] [2021-10-12 23:59:18,350 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-12 23:59:18,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982820388] [2021-10-12 23:59:18,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982820388] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:18,351 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-12 23:59:18,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-12 23:59:18,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899010512] [2021-10-12 23:59:18,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-12 23:59:18,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:18,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-12 23:59:18,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-12 23:59:18,354 INFO L87 Difference]: Start difference. First operand 195 states and 260 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 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) [2021-10-12 23:59:18,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:18,411 INFO L93 Difference]: Finished difference Result 223 states and 292 transitions. [2021-10-12 23:59:18,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-12 23:59:18,412 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 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) Word has length 25 [2021-10-12 23:59:18,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:18,413 INFO L225 Difference]: With dead ends: 223 [2021-10-12 23:59:18,414 INFO L226 Difference]: Without dead ends: 219 [2021-10-12 23:59:18,415 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 27.7ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-12 23:59:18,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-10-12 23:59:18,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 202. [2021-10-12 23:59:18,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 197 states have (on average 1.3604060913705585) internal successors, (268), 201 states have internal predecessors, (268), 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) [2021-10-12 23:59:18,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 268 transitions. [2021-10-12 23:59:18,432 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 268 transitions. Word has length 25 [2021-10-12 23:59:18,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:18,432 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 268 transitions. [2021-10-12 23:59:18,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 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) [2021-10-12 23:59:18,432 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 268 transitions. [2021-10-12 23:59:18,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-12 23:59:18,433 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:18,433 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:18,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:18,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:18,650 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-12 23:59:18,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:18,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1993727605, now seen corresponding path program 1 times [2021-10-12 23:59:18,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:18,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836735198] [2021-10-12 23:59:18,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:18,650 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:18,659 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-12 23:59:18,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [651005520] [2021-10-12 23:59:18,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:18,660 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:18,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:18,667 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:18,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-12 23:59:18,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:18,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-12 23:59:18,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:19,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:19,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:19,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836735198] [2021-10-12 23:59:19,167 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-12 23:59:19,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651005520] [2021-10-12 23:59:19,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651005520] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:19,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-12 23:59:19,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-12 23:59:19,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578971997] [2021-10-12 23:59:19,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-12 23:59:19,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:19,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-12 23:59:19,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-12 23:59:19,169 INFO L87 Difference]: Start difference. First operand 202 states and 268 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 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) [2021-10-12 23:59:19,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:19,319 INFO L93 Difference]: Finished difference Result 216 states and 276 transitions. [2021-10-12 23:59:19,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-12 23:59:19,319 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 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) Word has length 25 [2021-10-12 23:59:19,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:19,321 INFO L225 Difference]: With dead ends: 216 [2021-10-12 23:59:19,321 INFO L226 Difference]: Without dead ends: 214 [2021-10-12 23:59:19,321 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 70.2ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-12 23:59:19,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-10-12 23:59:19,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 202. [2021-10-12 23:59:19,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 197 states have (on average 1.350253807106599) internal successors, (266), 201 states have internal predecessors, (266), 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) [2021-10-12 23:59:19,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 266 transitions. [2021-10-12 23:59:19,337 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 266 transitions. Word has length 25 [2021-10-12 23:59:19,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:19,338 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 266 transitions. [2021-10-12 23:59:19,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 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) [2021-10-12 23:59:19,338 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 266 transitions. [2021-10-12 23:59:19,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-12 23:59:19,339 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:19,339 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:19,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:19,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-12 23:59:19,561 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-12 23:59:19,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:19,562 INFO L82 PathProgramCache]: Analyzing trace with hash 416971704, now seen corresponding path program 1 times [2021-10-12 23:59:19,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:19,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412485502] [2021-10-12 23:59:19,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:19,563 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:19,582 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-12 23:59:19,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [431361948] [2021-10-12 23:59:19,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:19,583 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:19,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:19,583 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:19,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-12 23:59:19,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:19,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-12 23:59:19,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:19,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:19,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:19,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412485502] [2021-10-12 23:59:19,978 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-12 23:59:19,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431361948] [2021-10-12 23:59:19,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431361948] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:19,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-12 23:59:19,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-12 23:59:19,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970585193] [2021-10-12 23:59:19,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-12 23:59:19,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:19,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-12 23:59:19,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-12 23:59:19,979 INFO L87 Difference]: Start difference. First operand 202 states and 266 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 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) [2021-10-12 23:59:20,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:20,234 INFO L93 Difference]: Finished difference Result 336 states and 421 transitions. [2021-10-12 23:59:20,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-12 23:59:20,234 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 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) Word has length 27 [2021-10-12 23:59:20,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:20,237 INFO L225 Difference]: With dead ends: 336 [2021-10-12 23:59:20,237 INFO L226 Difference]: Without dead ends: 334 [2021-10-12 23:59:20,238 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 132.8ms TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-10-12 23:59:20,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-10-12 23:59:20,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 243. [2021-10-12 23:59:20,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.3487394957983194) internal successors, (321), 242 states have internal predecessors, (321), 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) [2021-10-12 23:59:20,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 321 transitions. [2021-10-12 23:59:20,259 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 321 transitions. Word has length 27 [2021-10-12 23:59:20,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:20,260 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 321 transitions. [2021-10-12 23:59:20,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 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) [2021-10-12 23:59:20,260 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 321 transitions. [2021-10-12 23:59:20,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-12 23:59:20,261 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:20,261 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:20,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:20,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-12 23:59:20,489 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-12 23:59:20,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:20,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1345328893, now seen corresponding path program 2 times [2021-10-12 23:59:20,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:20,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98008307] [2021-10-12 23:59:20,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:20,490 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:20,501 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-12 23:59:20,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [444456963] [2021-10-12 23:59:20,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-12 23:59:20,501 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:20,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:20,502 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:20,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-12 23:59:20,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-12 23:59:20,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-12 23:59:20,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-12 23:59:20,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:20,827 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:20,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:20,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98008307] [2021-10-12 23:59:20,828 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-12 23:59:20,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444456963] [2021-10-12 23:59:20,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444456963] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:20,828 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:20,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-12 23:59:20,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829405221] [2021-10-12 23:59:20,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-12 23:59:20,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:20,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-12 23:59:20,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-12 23:59:20,833 INFO L87 Difference]: Start difference. First operand 243 states and 321 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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) [2021-10-12 23:59:20,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:20,959 INFO L93 Difference]: Finished difference Result 530 states and 713 transitions. [2021-10-12 23:59:20,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-12 23:59:20,960 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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) Word has length 30 [2021-10-12 23:59:20,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:20,963 INFO L225 Difference]: With dead ends: 530 [2021-10-12 23:59:20,963 INFO L226 Difference]: Without dead ends: 425 [2021-10-12 23:59:20,965 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 21.1ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-12 23:59:20,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-10-12 23:59:20,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 267. [2021-10-12 23:59:20,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 262 states have (on average 1.3549618320610688) internal successors, (355), 266 states have internal predecessors, (355), 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) [2021-10-12 23:59:20,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 355 transitions. [2021-10-12 23:59:20,989 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 355 transitions. Word has length 30 [2021-10-12 23:59:20,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:20,989 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 355 transitions. [2021-10-12 23:59:20,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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) [2021-10-12 23:59:20,990 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 355 transitions. [2021-10-12 23:59:20,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-12 23:59:20,991 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:20,991 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:21,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:21,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-12 23:59:21,213 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-12 23:59:21,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:21,214 INFO L82 PathProgramCache]: Analyzing trace with hash -28513692, now seen corresponding path program 1 times [2021-10-12 23:59:21,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:21,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285673754] [2021-10-12 23:59:21,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:21,214 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:21,224 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-12 23:59:21,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1180917079] [2021-10-12 23:59:21,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:21,225 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:21,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:21,226 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:21,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-12 23:59:21,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:21,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-12 23:59:21,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:21,603 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:21,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:21,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285673754] [2021-10-12 23:59:21,603 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-12 23:59:21,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180917079] [2021-10-12 23:59:21,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180917079] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:21,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-12 23:59:21,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-12 23:59:21,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923513159] [2021-10-12 23:59:21,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-12 23:59:21,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:21,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-12 23:59:21,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-12 23:59:21,605 INFO L87 Difference]: Start difference. First operand 267 states and 355 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 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) [2021-10-12 23:59:21,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:21,673 INFO L93 Difference]: Finished difference Result 487 states and 657 transitions. [2021-10-12 23:59:21,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-12 23:59:21,673 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 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) Word has length 30 [2021-10-12 23:59:21,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:21,675 INFO L225 Difference]: With dead ends: 487 [2021-10-12 23:59:21,675 INFO L226 Difference]: Without dead ends: 285 [2021-10-12 23:59:21,676 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 33.2ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-10-12 23:59:21,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-10-12 23:59:21,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 281. [2021-10-12 23:59:21,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 276 states have (on average 1.3405797101449275) internal successors, (370), 280 states have internal predecessors, (370), 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) [2021-10-12 23:59:21,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 370 transitions. [2021-10-12 23:59:21,701 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 370 transitions. Word has length 30 [2021-10-12 23:59:21,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:21,702 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 370 transitions. [2021-10-12 23:59:21,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 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) [2021-10-12 23:59:21,702 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 370 transitions. [2021-10-12 23:59:21,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-12 23:59:21,703 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:21,703 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:21,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:21,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-12 23:59:21,916 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-12 23:59:21,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:21,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1302269029, now seen corresponding path program 1 times [2021-10-12 23:59:21,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:21,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313269934] [2021-10-12 23:59:21,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:21,917 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:21,933 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-12 23:59:21,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [857010110] [2021-10-12 23:59:21,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:21,933 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:21,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:21,934 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:21,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-12 23:59:22,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:22,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-12 23:59:22,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:22,495 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:22,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:22,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313269934] [2021-10-12 23:59:22,495 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-12 23:59:22,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857010110] [2021-10-12 23:59:22,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857010110] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:22,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-12 23:59:22,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-12 23:59:22,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547353464] [2021-10-12 23:59:22,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-12 23:59:22,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:22,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-12 23:59:22,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-10-12 23:59:22,499 INFO L87 Difference]: Start difference. First operand 281 states and 370 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 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) [2021-10-12 23:59:22,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:22,793 INFO L93 Difference]: Finished difference Result 363 states and 478 transitions. [2021-10-12 23:59:22,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-12 23:59:22,794 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 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) Word has length 32 [2021-10-12 23:59:22,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:22,796 INFO L225 Difference]: With dead ends: 363 [2021-10-12 23:59:22,796 INFO L226 Difference]: Without dead ends: 361 [2021-10-12 23:59:22,797 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 198.1ms TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-10-12 23:59:22,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-10-12 23:59:22,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 291. [2021-10-12 23:59:22,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 286 states have (on average 1.3356643356643356) internal successors, (382), 290 states have internal predecessors, (382), 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) [2021-10-12 23:59:22,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 382 transitions. [2021-10-12 23:59:22,825 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 382 transitions. Word has length 32 [2021-10-12 23:59:22,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:22,826 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 382 transitions. [2021-10-12 23:59:22,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 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) [2021-10-12 23:59:22,826 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 382 transitions. [2021-10-12 23:59:22,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-12 23:59:22,827 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:22,827 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-12 23:59:22,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:23,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:23,037 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-12 23:59:23,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:23,038 INFO L82 PathProgramCache]: Analyzing trace with hash 885134474, now seen corresponding path program 1 times [2021-10-12 23:59:23,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:23,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253200645] [2021-10-12 23:59:23,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:23,038 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:23,046 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-12 23:59:23,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1301377286] [2021-10-12 23:59:23,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:23,046 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:23,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:23,047 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:23,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-12 23:59:23,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:23,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 57 conjunts are in the unsatisfiable core [2021-10-12 23:59:23,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:24,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:24,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:24,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253200645] [2021-10-12 23:59:24,250 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-12 23:59:24,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301377286] [2021-10-12 23:59:24,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301377286] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:24,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-12 23:59:24,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-12 23:59:24,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295623884] [2021-10-12 23:59:24,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-12 23:59:24,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:24,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-12 23:59:24,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-12 23:59:24,252 INFO L87 Difference]: Start difference. First operand 291 states and 382 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 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) [2021-10-12 23:59:24,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:24,738 INFO L93 Difference]: Finished difference Result 395 states and 508 transitions. [2021-10-12 23:59:24,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-12 23:59:24,739 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 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) Word has length 33 [2021-10-12 23:59:24,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:24,741 INFO L225 Difference]: With dead ends: 395 [2021-10-12 23:59:24,741 INFO L226 Difference]: Without dead ends: 387 [2021-10-12 23:59:24,742 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 269.7ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-10-12 23:59:24,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-10-12 23:59:24,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 335. [2021-10-12 23:59:24,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 330 states have (on average 1.3242424242424242) internal successors, (437), 334 states have internal predecessors, (437), 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) [2021-10-12 23:59:24,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 437 transitions. [2021-10-12 23:59:24,782 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 437 transitions. Word has length 33 [2021-10-12 23:59:24,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:24,782 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 437 transitions. [2021-10-12 23:59:24,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 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) [2021-10-12 23:59:24,782 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 437 transitions. [2021-10-12 23:59:24,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-12 23:59:24,783 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:24,783 INFO L512 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1] [2021-10-12 23:59:24,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:25,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:25,009 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-12 23:59:25,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:25,010 INFO L82 PathProgramCache]: Analyzing trace with hash 731699348, now seen corresponding path program 1 times [2021-10-12 23:59:25,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:25,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47624447] [2021-10-12 23:59:25,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:25,010 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:25,026 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-12 23:59:25,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [29608491] [2021-10-12 23:59:25,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:25,027 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:25,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:25,028 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:25,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-12 23:59:25,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:25,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-12 23:59:25,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:25,487 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:25,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:25,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47624447] [2021-10-12 23:59:25,487 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-12 23:59:25,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29608491] [2021-10-12 23:59:25,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29608491] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:25,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-12 23:59:25,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-12 23:59:25,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164250725] [2021-10-12 23:59:25,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-12 23:59:25,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:25,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-12 23:59:25,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-12 23:59:25,489 INFO L87 Difference]: Start difference. First operand 335 states and 437 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 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) [2021-10-12 23:59:25,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:25,576 INFO L93 Difference]: Finished difference Result 510 states and 677 transitions. [2021-10-12 23:59:25,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-12 23:59:25,576 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 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) Word has length 38 [2021-10-12 23:59:25,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:25,579 INFO L225 Difference]: With dead ends: 510 [2021-10-12 23:59:25,579 INFO L226 Difference]: Without dead ends: 361 [2021-10-12 23:59:25,579 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 41.0ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-10-12 23:59:25,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-10-12 23:59:25,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 350. [2021-10-12 23:59:25,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 345 states have (on average 1.3159420289855073) internal successors, (454), 349 states have internal predecessors, (454), 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) [2021-10-12 23:59:25,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 454 transitions. [2021-10-12 23:59:25,608 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 454 transitions. Word has length 38 [2021-10-12 23:59:25,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:25,609 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 454 transitions. [2021-10-12 23:59:25,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 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) [2021-10-12 23:59:25,609 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 454 transitions. [2021-10-12 23:59:25,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-12 23:59:25,610 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:25,610 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1] [2021-10-12 23:59:25,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:25,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:25,833 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-12 23:59:25,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:25,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1517440196, now seen corresponding path program 1 times [2021-10-12 23:59:25,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:25,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774177100] [2021-10-12 23:59:25,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:25,834 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:25,848 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-12 23:59:25,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [499891463] [2021-10-12 23:59:25,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:25,850 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:25,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:25,851 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:25,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-12 23:59:26,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:26,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-12 23:59:26,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:26,317 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:26,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:26,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774177100] [2021-10-12 23:59:26,318 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-12 23:59:26,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499891463] [2021-10-12 23:59:26,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499891463] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:26,318 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-12 23:59:26,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-12 23:59:26,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814168951] [2021-10-12 23:59:26,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-12 23:59:26,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:26,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-12 23:59:26,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-12 23:59:26,320 INFO L87 Difference]: Start difference. First operand 350 states and 454 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 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) [2021-10-12 23:59:26,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:26,437 INFO L93 Difference]: Finished difference Result 421 states and 536 transitions. [2021-10-12 23:59:26,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-12 23:59:26,437 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 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) Word has length 39 [2021-10-12 23:59:26,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:26,441 INFO L225 Difference]: With dead ends: 421 [2021-10-12 23:59:26,441 INFO L226 Difference]: Without dead ends: 417 [2021-10-12 23:59:26,442 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 51.6ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-10-12 23:59:26,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-10-12 23:59:26,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 358. [2021-10-12 23:59:26,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 353 states have (on average 1.3144475920679888) internal successors, (464), 357 states have internal predecessors, (464), 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) [2021-10-12 23:59:26,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 464 transitions. [2021-10-12 23:59:26,473 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 464 transitions. Word has length 39 [2021-10-12 23:59:26,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:26,473 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 464 transitions. [2021-10-12 23:59:26,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 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) [2021-10-12 23:59:26,473 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 464 transitions. [2021-10-12 23:59:26,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-12 23:59:26,474 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:26,474 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:26,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:26,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:26,693 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-12 23:59:26,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:26,694 INFO L82 PathProgramCache]: Analyzing trace with hash -631528752, now seen corresponding path program 1 times [2021-10-12 23:59:26,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:26,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104964173] [2021-10-12 23:59:26,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:26,694 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:26,708 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-12 23:59:26,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [156259187] [2021-10-12 23:59:26,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:26,717 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:26,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:26,718 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:26,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-12 23:59:27,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:27,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-12 23:59:27,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:27,368 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:27,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:27,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104964173] [2021-10-12 23:59:27,368 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-12 23:59:27,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156259187] [2021-10-12 23:59:27,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156259187] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:27,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-12 23:59:27,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-12 23:59:27,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880598468] [2021-10-12 23:59:27,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-12 23:59:27,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:27,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-12 23:59:27,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-12 23:59:27,370 INFO L87 Difference]: Start difference. First operand 358 states and 464 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 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) [2021-10-12 23:59:27,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:27,989 INFO L93 Difference]: Finished difference Result 746 states and 961 transitions. [2021-10-12 23:59:27,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-12 23:59:27,989 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 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) Word has length 39 [2021-10-12 23:59:27,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:27,993 INFO L225 Difference]: With dead ends: 746 [2021-10-12 23:59:27,993 INFO L226 Difference]: Without dead ends: 744 [2021-10-12 23:59:27,994 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 324.2ms TimeCoverageRelationStatistics Valid=327, Invalid=1079, Unknown=0, NotChecked=0, Total=1406 [2021-10-12 23:59:27,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2021-10-12 23:59:28,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 397. [2021-10-12 23:59:28,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 392 states have (on average 1.316326530612245) internal successors, (516), 396 states have internal predecessors, (516), 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) [2021-10-12 23:59:28,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 516 transitions. [2021-10-12 23:59:28,032 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 516 transitions. Word has length 39 [2021-10-12 23:59:28,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:28,033 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 516 transitions. [2021-10-12 23:59:28,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 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) [2021-10-12 23:59:28,033 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 516 transitions. [2021-10-12 23:59:28,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-12 23:59:28,034 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:28,034 INFO L512 BasicCegarLoop]: trace histogram [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, 1] [2021-10-12 23:59:28,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:28,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-12 23:59:28,257 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-12 23:59:28,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:28,258 INFO L82 PathProgramCache]: Analyzing trace with hash 203246581, now seen corresponding path program 2 times [2021-10-12 23:59:28,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:28,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548414126] [2021-10-12 23:59:28,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:28,258 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:28,266 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-12 23:59:28,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2062901305] [2021-10-12 23:59:28,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-12 23:59:28,267 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:28,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:28,268 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:28,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-12 23:59:28,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-12 23:59:28,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-12 23:59:28,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-12 23:59:28,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:28,831 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:28,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:28,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548414126] [2021-10-12 23:59:28,833 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-12 23:59:28,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062901305] [2021-10-12 23:59:28,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062901305] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:28,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-12 23:59:28,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-12 23:59:28,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423247951] [2021-10-12 23:59:28,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-12 23:59:28,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:28,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-12 23:59:28,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-12 23:59:28,834 INFO L87 Difference]: Start difference. First operand 397 states and 516 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 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) [2021-10-12 23:59:29,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:29,164 INFO L93 Difference]: Finished difference Result 967 states and 1267 transitions. [2021-10-12 23:59:29,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-12 23:59:29,164 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 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) Word has length 40 [2021-10-12 23:59:29,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:29,170 INFO L225 Difference]: With dead ends: 967 [2021-10-12 23:59:29,170 INFO L226 Difference]: Without dead ends: 963 [2021-10-12 23:59:29,170 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 128.1ms TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-10-12 23:59:29,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-10-12 23:59:29,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 471. [2021-10-12 23:59:29,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 466 states have (on average 1.3283261802575108) internal successors, (619), 470 states have internal predecessors, (619), 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) [2021-10-12 23:59:29,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 619 transitions. [2021-10-12 23:59:29,218 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 619 transitions. Word has length 40 [2021-10-12 23:59:29,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:29,218 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 619 transitions. [2021-10-12 23:59:29,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 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) [2021-10-12 23:59:29,219 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 619 transitions. [2021-10-12 23:59:29,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-12 23:59:29,219 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:29,220 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-10-12 23:59:29,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:29,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-12 23:59:29,445 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-12 23:59:29,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:29,446 INFO L82 PathProgramCache]: Analyzing trace with hash 905429967, now seen corresponding path program 1 times [2021-10-12 23:59:29,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:29,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830604829] [2021-10-12 23:59:29,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:29,446 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:29,455 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-12 23:59:29,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [716780962] [2021-10-12 23:59:29,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:29,455 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:29,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:29,464 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:29,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-12 23:59:29,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:29,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-12 23:59:29,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:29,932 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:29,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:29,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830604829] [2021-10-12 23:59:29,932 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-12 23:59:29,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716780962] [2021-10-12 23:59:29,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716780962] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:29,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-12 23:59:29,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-12 23:59:29,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210919135] [2021-10-12 23:59:29,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-12 23:59:29,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:29,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-12 23:59:29,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-12 23:59:29,935 INFO L87 Difference]: Start difference. First operand 471 states and 619 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 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) [2021-10-12 23:59:30,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:30,047 INFO L93 Difference]: Finished difference Result 785 states and 1052 transitions. [2021-10-12 23:59:30,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-12 23:59:30,047 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 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) Word has length 40 [2021-10-12 23:59:30,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:30,050 INFO L225 Difference]: With dead ends: 785 [2021-10-12 23:59:30,050 INFO L226 Difference]: Without dead ends: 483 [2021-10-12 23:59:30,051 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 39.9ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-10-12 23:59:30,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-10-12 23:59:30,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 479. [2021-10-12 23:59:30,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 474 states have (on average 1.3206751054852321) internal successors, (626), 478 states have internal predecessors, (626), 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) [2021-10-12 23:59:30,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 626 transitions. [2021-10-12 23:59:30,117 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 626 transitions. Word has length 40 [2021-10-12 23:59:30,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:30,117 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 626 transitions. [2021-10-12 23:59:30,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 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) [2021-10-12 23:59:30,117 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 626 transitions. [2021-10-12 23:59:30,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-12 23:59:30,118 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:30,118 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-10-12 23:59:30,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:30,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-12 23:59:30,333 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-12 23:59:30,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:30,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1573117064, now seen corresponding path program 1 times [2021-10-12 23:59:30,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:30,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338547369] [2021-10-12 23:59:30,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:30,334 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:30,348 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-12 23:59:30,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [154108491] [2021-10-12 23:59:30,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:30,349 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:30,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:30,350 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:30,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-12 23:59:30,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:30,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-12 23:59:30,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:30,812 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-12 23:59:30,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:30,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338547369] [2021-10-12 23:59:30,813 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-12 23:59:30,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154108491] [2021-10-12 23:59:30,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154108491] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:30,813 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:30,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-12 23:59:30,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669999994] [2021-10-12 23:59:30,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-12 23:59:30,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:30,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-12 23:59:30,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-12 23:59:30,815 INFO L87 Difference]: Start difference. First operand 479 states and 626 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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) [2021-10-12 23:59:30,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:30,888 INFO L93 Difference]: Finished difference Result 906 states and 1214 transitions. [2021-10-12 23:59:30,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-12 23:59:30,889 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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) Word has length 41 [2021-10-12 23:59:30,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:30,892 INFO L225 Difference]: With dead ends: 906 [2021-10-12 23:59:30,892 INFO L226 Difference]: Without dead ends: 545 [2021-10-12 23:59:30,893 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-12 23:59:30,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-10-12 23:59:30,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 483. [2021-10-12 23:59:30,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 478 states have (on average 1.3284518828451883) internal successors, (635), 482 states have internal predecessors, (635), 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) [2021-10-12 23:59:30,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 635 transitions. [2021-10-12 23:59:30,940 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 635 transitions. Word has length 41 [2021-10-12 23:59:30,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:30,941 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 635 transitions. [2021-10-12 23:59:30,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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) [2021-10-12 23:59:30,941 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 635 transitions. [2021-10-12 23:59:30,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-12 23:59:30,942 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:30,942 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-10-12 23:59:30,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:31,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-12 23:59:31,157 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-12 23:59:31,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:31,158 INFO L82 PathProgramCache]: Analyzing trace with hash -149759960, now seen corresponding path program 2 times [2021-10-12 23:59:31,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:31,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061391981] [2021-10-12 23:59:31,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:31,158 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:31,170 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-12 23:59:31,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1207832662] [2021-10-12 23:59:31,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-12 23:59:31,171 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:31,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:31,172 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:31,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-12 23:59:31,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-12 23:59:31,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-12 23:59:31,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-12 23:59:31,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:31,788 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-12 23:59:31,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:31,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061391981] [2021-10-12 23:59:31,789 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-12 23:59:31,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207832662] [2021-10-12 23:59:31,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207832662] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:31,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:31,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-12 23:59:31,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984883517] [2021-10-12 23:59:31,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-12 23:59:31,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:31,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-12 23:59:31,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-12 23:59:31,790 INFO L87 Difference]: Start difference. First operand 483 states and 635 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 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) [2021-10-12 23:59:31,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:31,901 INFO L93 Difference]: Finished difference Result 560 states and 736 transitions. [2021-10-12 23:59:31,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-12 23:59:31,901 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 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) Word has length 41 [2021-10-12 23:59:31,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:31,903 INFO L225 Difference]: With dead ends: 560 [2021-10-12 23:59:31,904 INFO L226 Difference]: Without dead ends: 558 [2021-10-12 23:59:31,904 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-12 23:59:31,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-10-12 23:59:31,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 539. [2021-10-12 23:59:31,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 534 states have (on average 1.3314606741573034) internal successors, (711), 538 states have internal predecessors, (711), 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) [2021-10-12 23:59:31,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 711 transitions. [2021-10-12 23:59:31,956 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 711 transitions. Word has length 41 [2021-10-12 23:59:31,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:31,956 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 711 transitions. [2021-10-12 23:59:31,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 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) [2021-10-12 23:59:31,957 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 711 transitions. [2021-10-12 23:59:31,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-10-12 23:59:31,957 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:31,957 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:31,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:32,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:32,175 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-12 23:59:32,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:32,176 INFO L82 PathProgramCache]: Analyzing trace with hash -595443504, now seen corresponding path program 2 times [2021-10-12 23:59:32,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:32,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015221855] [2021-10-12 23:59:32,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:32,176 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:32,184 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-12 23:59:32,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1894454816] [2021-10-12 23:59:32,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-12 23:59:32,185 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:32,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:32,186 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:32,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-12 23:59:32,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-12 23:59:32,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-12 23:59:32,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-12 23:59:32,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:32,925 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:32,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:32,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015221855] [2021-10-12 23:59:32,925 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-12 23:59:32,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894454816] [2021-10-12 23:59:32,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894454816] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:32,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-12 23:59:32,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-12 23:59:32,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164606315] [2021-10-12 23:59:32,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-12 23:59:32,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:32,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-12 23:59:32,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-12 23:59:32,927 INFO L87 Difference]: Start difference. First operand 539 states and 711 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 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) [2021-10-12 23:59:33,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:33,293 INFO L93 Difference]: Finished difference Result 668 states and 885 transitions. [2021-10-12 23:59:33,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-12 23:59:33,293 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 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) Word has length 42 [2021-10-12 23:59:33,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:33,297 INFO L225 Difference]: With dead ends: 668 [2021-10-12 23:59:33,297 INFO L226 Difference]: Without dead ends: 666 [2021-10-12 23:59:33,298 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 214.4ms TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-10-12 23:59:33,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-10-12 23:59:33,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 549. [2021-10-12 23:59:33,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 544 states have (on average 1.3290441176470589) internal successors, (723), 548 states have internal predecessors, (723), 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) [2021-10-12 23:59:33,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 723 transitions. [2021-10-12 23:59:33,347 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 723 transitions. Word has length 42 [2021-10-12 23:59:33,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:33,347 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 723 transitions. [2021-10-12 23:59:33,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 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) [2021-10-12 23:59:33,347 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 723 transitions. [2021-10-12 23:59:33,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-12 23:59:33,348 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:33,348 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:33,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:33,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:33,561 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-12 23:59:33,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:33,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1321889269, now seen corresponding path program 1 times [2021-10-12 23:59:33,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:33,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299285930] [2021-10-12 23:59:33,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:33,562 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:33,570 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-12 23:59:33,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1423163805] [2021-10-12 23:59:33,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:33,571 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:33,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:33,589 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:33,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-12 23:59:34,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:34,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 59 conjunts are in the unsatisfiable core [2021-10-12 23:59:34,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:35,524 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:35,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:35,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299285930] [2021-10-12 23:59:35,525 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-12 23:59:35,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423163805] [2021-10-12 23:59:35,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423163805] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:35,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-12 23:59:35,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-10-12 23:59:35,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506561898] [2021-10-12 23:59:35,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-12 23:59:35,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:35,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-12 23:59:35,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-10-12 23:59:35,528 INFO L87 Difference]: Start difference. First operand 549 states and 723 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 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) [2021-10-12 23:59:36,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:36,937 INFO L93 Difference]: Finished difference Result 725 states and 945 transitions. [2021-10-12 23:59:36,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-12 23:59:36,938 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 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) Word has length 43 [2021-10-12 23:59:36,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:36,943 INFO L225 Difference]: With dead ends: 725 [2021-10-12 23:59:36,943 INFO L226 Difference]: Without dead ends: 717 [2021-10-12 23:59:36,945 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 956.8ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-10-12 23:59:36,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-10-12 23:59:37,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 582. [2021-10-12 23:59:37,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 577 states have (on average 1.318890814558059) internal successors, (761), 581 states have internal predecessors, (761), 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) [2021-10-12 23:59:37,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 761 transitions. [2021-10-12 23:59:37,019 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 761 transitions. Word has length 43 [2021-10-12 23:59:37,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:37,019 INFO L470 AbstractCegarLoop]: Abstraction has 582 states and 761 transitions. [2021-10-12 23:59:37,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 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) [2021-10-12 23:59:37,020 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 761 transitions. [2021-10-12 23:59:37,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-12 23:59:37,020 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:37,020 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:37,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:37,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-12 23:59:37,237 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-12 23:59:37,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:37,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1565965267, now seen corresponding path program 1 times [2021-10-12 23:59:37,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:37,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353884547] [2021-10-12 23:59:37,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:37,237 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:37,247 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-12 23:59:37,247 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1627458592] [2021-10-12 23:59:37,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:37,247 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:37,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:37,248 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:37,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-12 23:59:37,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:37,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-12 23:59:37,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:37,968 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-12 23:59:37,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:37,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353884547] [2021-10-12 23:59:37,968 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-12 23:59:37,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627458592] [2021-10-12 23:59:37,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627458592] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:37,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-12 23:59:37,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-12 23:59:37,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377347791] [2021-10-12 23:59:37,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-12 23:59:37,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:37,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-12 23:59:37,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-12 23:59:37,969 INFO L87 Difference]: Start difference. First operand 582 states and 761 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 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) [2021-10-12 23:59:38,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:38,275 INFO L93 Difference]: Finished difference Result 770 states and 1014 transitions. [2021-10-12 23:59:38,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-12 23:59:38,275 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 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) Word has length 44 [2021-10-12 23:59:38,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:38,280 INFO L225 Difference]: With dead ends: 770 [2021-10-12 23:59:38,280 INFO L226 Difference]: Without dead ends: 766 [2021-10-12 23:59:38,281 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 82.2ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-10-12 23:59:38,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-10-12 23:59:38,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 603. [2021-10-12 23:59:38,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 598 states have (on average 1.31438127090301) internal successors, (786), 602 states have internal predecessors, (786), 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) [2021-10-12 23:59:38,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 786 transitions. [2021-10-12 23:59:38,365 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 786 transitions. Word has length 44 [2021-10-12 23:59:38,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:38,365 INFO L470 AbstractCegarLoop]: Abstraction has 603 states and 786 transitions. [2021-10-12 23:59:38,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 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) [2021-10-12 23:59:38,382 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 786 transitions. [2021-10-12 23:59:38,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-12 23:59:38,383 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:38,383 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:38,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:38,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:38,584 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-12 23:59:38,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:38,584 INFO L82 PathProgramCache]: Analyzing trace with hash -15075340, now seen corresponding path program 1 times [2021-10-12 23:59:38,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:38,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093625036] [2021-10-12 23:59:38,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:38,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:38,596 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-12 23:59:38,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1363961918] [2021-10-12 23:59:38,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:38,597 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:38,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:38,598 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:38,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-12 23:59:39,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:39,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-12 23:59:39,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:39,302 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:39,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:39,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093625036] [2021-10-12 23:59:39,302 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-12 23:59:39,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363961918] [2021-10-12 23:59:39,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363961918] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:39,303 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-12 23:59:39,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-12 23:59:39,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816602955] [2021-10-12 23:59:39,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-12 23:59:39,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:39,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-12 23:59:39,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-12 23:59:39,304 INFO L87 Difference]: Start difference. First operand 603 states and 786 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 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) [2021-10-12 23:59:39,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:39,462 INFO L93 Difference]: Finished difference Result 1073 states and 1426 transitions. [2021-10-12 23:59:39,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-12 23:59:39,463 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 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) Word has length 44 [2021-10-12 23:59:39,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:39,466 INFO L225 Difference]: With dead ends: 1073 [2021-10-12 23:59:39,466 INFO L226 Difference]: Without dead ends: 629 [2021-10-12 23:59:39,467 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 56.2ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-10-12 23:59:39,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-10-12 23:59:39,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 621. [2021-10-12 23:59:39,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 616 states have (on average 1.3084415584415585) internal successors, (806), 620 states have internal predecessors, (806), 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) [2021-10-12 23:59:39,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 806 transitions. [2021-10-12 23:59:39,547 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 806 transitions. Word has length 44 [2021-10-12 23:59:39,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:39,547 INFO L470 AbstractCegarLoop]: Abstraction has 621 states and 806 transitions. [2021-10-12 23:59:39,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 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) [2021-10-12 23:59:39,548 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 806 transitions. [2021-10-12 23:59:39,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-12 23:59:39,549 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:39,549 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:39,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:39,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:39,765 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-12 23:59:39,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:39,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1214368663, now seen corresponding path program 2 times [2021-10-12 23:59:39,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:39,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027199203] [2021-10-12 23:59:39,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:39,766 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:39,799 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-12 23:59:39,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1756282286] [2021-10-12 23:59:39,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-12 23:59:39,800 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:39,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:39,801 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:39,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-12 23:59:40,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-12 23:59:40,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-12 23:59:40,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-12 23:59:40,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:40,510 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:40,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:40,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027199203] [2021-10-12 23:59:40,511 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-12 23:59:40,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756282286] [2021-10-12 23:59:40,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756282286] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:40,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-12 23:59:40,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-12 23:59:40,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865348897] [2021-10-12 23:59:40,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-12 23:59:40,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:40,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-12 23:59:40,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-10-12 23:59:40,512 INFO L87 Difference]: Start difference. First operand 621 states and 806 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 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) [2021-10-12 23:59:40,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:40,693 INFO L93 Difference]: Finished difference Result 1061 states and 1395 transitions. [2021-10-12 23:59:40,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-12 23:59:40,694 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 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) Word has length 45 [2021-10-12 23:59:40,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:40,697 INFO L225 Difference]: With dead ends: 1061 [2021-10-12 23:59:40,698 INFO L226 Difference]: Without dead ends: 703 [2021-10-12 23:59:40,699 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 62.9ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-10-12 23:59:40,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2021-10-12 23:59:40,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 669. [2021-10-12 23:59:40,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 664 states have (on average 1.2966867469879517) internal successors, (861), 668 states have internal predecessors, (861), 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) [2021-10-12 23:59:40,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 861 transitions. [2021-10-12 23:59:40,787 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 861 transitions. Word has length 45 [2021-10-12 23:59:40,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:40,788 INFO L470 AbstractCegarLoop]: Abstraction has 669 states and 861 transitions. [2021-10-12 23:59:40,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 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) [2021-10-12 23:59:40,788 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 861 transitions. [2021-10-12 23:59:40,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-12 23:59:40,791 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:40,791 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:40,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:41,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-10-12 23:59:41,017 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-12 23:59:41,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:41,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1653911024, now seen corresponding path program 1 times [2021-10-12 23:59:41,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:41,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907078365] [2021-10-12 23:59:41,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:41,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:41,039 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-12 23:59:41,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [251198660] [2021-10-12 23:59:41,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:41,039 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:41,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:41,045 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:41,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-10-12 23:59:41,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:41,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 55 conjunts are in the unsatisfiable core [2021-10-12 23:59:41,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:42,853 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:42,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:42,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907078365] [2021-10-12 23:59:42,853 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-12 23:59:42,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251198660] [2021-10-12 23:59:42,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251198660] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:42,853 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-12 23:59:42,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-12 23:59:42,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832567084] [2021-10-12 23:59:42,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-12 23:59:42,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:42,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-12 23:59:42,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-10-12 23:59:42,854 INFO L87 Difference]: Start difference. First operand 669 states and 861 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 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) [2021-10-12 23:59:43,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:43,529 INFO L93 Difference]: Finished difference Result 827 states and 1055 transitions. [2021-10-12 23:59:43,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-12 23:59:43,530 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 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) Word has length 46 [2021-10-12 23:59:43,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:43,534 INFO L225 Difference]: With dead ends: 827 [2021-10-12 23:59:43,534 INFO L226 Difference]: Without dead ends: 825 [2021-10-12 23:59:43,535 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 369.5ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-10-12 23:59:43,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-10-12 23:59:43,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 665. [2021-10-12 23:59:43,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 660 states have (on average 1.2984848484848486) internal successors, (857), 664 states have internal predecessors, (857), 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) [2021-10-12 23:59:43,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 857 transitions. [2021-10-12 23:59:43,623 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 857 transitions. Word has length 46 [2021-10-12 23:59:43,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:43,624 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 857 transitions. [2021-10-12 23:59:43,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 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) [2021-10-12 23:59:43,624 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 857 transitions. [2021-10-12 23:59:43,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-12 23:59:43,628 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:43,628 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:43,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:43,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-10-12 23:59:43,850 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-12 23:59:43,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:43,850 INFO L82 PathProgramCache]: Analyzing trace with hash -927382991, now seen corresponding path program 1 times [2021-10-12 23:59:43,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:43,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080402490] [2021-10-12 23:59:43,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:43,851 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:43,859 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-12 23:59:43,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1294035917] [2021-10-12 23:59:43,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:43,859 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:43,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:43,860 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:43,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-12 23:59:44,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:44,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-12 23:59:44,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:44,645 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:44,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:44,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080402490] [2021-10-12 23:59:44,646 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-12 23:59:44,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294035917] [2021-10-12 23:59:44,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294035917] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:44,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-12 23:59:44,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-12 23:59:44,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670938079] [2021-10-12 23:59:44,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-12 23:59:44,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:44,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-12 23:59:44,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-10-12 23:59:44,648 INFO L87 Difference]: Start difference. First operand 665 states and 857 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 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) [2021-10-12 23:59:44,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:44,768 INFO L93 Difference]: Finished difference Result 711 states and 902 transitions. [2021-10-12 23:59:44,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-12 23:59:44,769 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 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) Word has length 49 [2021-10-12 23:59:44,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:44,772 INFO L225 Difference]: With dead ends: 711 [2021-10-12 23:59:44,772 INFO L226 Difference]: Without dead ends: 707 [2021-10-12 23:59:44,772 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 61.7ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-10-12 23:59:44,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-10-12 23:59:44,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 683. [2021-10-12 23:59:44,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 678 states have (on average 1.2935103244837758) internal successors, (877), 682 states have internal predecessors, (877), 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) [2021-10-12 23:59:44,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 877 transitions. [2021-10-12 23:59:44,883 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 877 transitions. Word has length 49 [2021-10-12 23:59:44,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:44,883 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 877 transitions. [2021-10-12 23:59:44,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 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) [2021-10-12 23:59:44,883 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 877 transitions. [2021-10-12 23:59:44,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-12 23:59:44,884 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:44,885 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:44,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:45,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:45,109 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-12 23:59:45,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:45,110 INFO L82 PathProgramCache]: Analyzing trace with hash -41471547, now seen corresponding path program 2 times [2021-10-12 23:59:45,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:45,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012275551] [2021-10-12 23:59:45,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:45,110 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:45,128 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-12 23:59:45,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1016561044] [2021-10-12 23:59:45,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-12 23:59:45,129 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:45,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:45,130 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:45,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-12 23:59:45,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-12 23:59:45,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-12 23:59:45,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-12 23:59:45,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:46,181 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:46,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:46,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012275551] [2021-10-12 23:59:46,182 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-12 23:59:46,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016561044] [2021-10-12 23:59:46,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016561044] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:46,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-12 23:59:46,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-12 23:59:46,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159585522] [2021-10-12 23:59:46,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-12 23:59:46,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:46,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-12 23:59:46,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-12 23:59:46,184 INFO L87 Difference]: Start difference. First operand 683 states and 877 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 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) [2021-10-12 23:59:47,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:47,001 INFO L93 Difference]: Finished difference Result 1333 states and 1723 transitions. [2021-10-12 23:59:47,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-12 23:59:47,002 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 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) Word has length 49 [2021-10-12 23:59:47,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:47,007 INFO L225 Difference]: With dead ends: 1333 [2021-10-12 23:59:47,007 INFO L226 Difference]: Without dead ends: 1331 [2021-10-12 23:59:47,008 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 426.6ms TimeCoverageRelationStatistics Valid=416, Invalid=1564, Unknown=0, NotChecked=0, Total=1980 [2021-10-12 23:59:47,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2021-10-12 23:59:47,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 713. [2021-10-12 23:59:47,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 708 states have (on average 1.2937853107344632) internal successors, (916), 712 states have internal predecessors, (916), 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) [2021-10-12 23:59:47,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 916 transitions. [2021-10-12 23:59:47,108 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 916 transitions. Word has length 49 [2021-10-12 23:59:47,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:47,108 INFO L470 AbstractCegarLoop]: Abstraction has 713 states and 916 transitions. [2021-10-12 23:59:47,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 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) [2021-10-12 23:59:47,109 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 916 transitions. [2021-10-12 23:59:47,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-12 23:59:47,110 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:47,110 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:47,147 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-10-12 23:59:47,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-10-12 23:59:47,333 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-12 23:59:47,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:47,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1315150752, now seen corresponding path program 2 times [2021-10-12 23:59:47,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:47,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270880851] [2021-10-12 23:59:47,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:47,334 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:47,344 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-12 23:59:47,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1594105645] [2021-10-12 23:59:47,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-12 23:59:47,344 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:47,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:47,345 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:47,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-10-12 23:59:48,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-12 23:59:48,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-12 23:59:48,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 78 conjunts are in the unsatisfiable core [2021-10-12 23:59:48,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:49,234 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:49,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:49,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270880851] [2021-10-12 23:59:49,235 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-12 23:59:49,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594105645] [2021-10-12 23:59:49,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594105645] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:49,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-12 23:59:49,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-10-12 23:59:49,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252738572] [2021-10-12 23:59:49,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-12 23:59:49,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:49,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-12 23:59:49,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-10-12 23:59:49,237 INFO L87 Difference]: Start difference. First operand 713 states and 916 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 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) [2021-10-12 23:59:50,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:50,334 INFO L93 Difference]: Finished difference Result 1032 states and 1329 transitions. [2021-10-12 23:59:50,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-12 23:59:50,335 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 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) Word has length 50 [2021-10-12 23:59:50,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:50,340 INFO L225 Difference]: With dead ends: 1032 [2021-10-12 23:59:50,340 INFO L226 Difference]: Without dead ends: 1024 [2021-10-12 23:59:50,340 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 487.3ms TimeCoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2021-10-12 23:59:50,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2021-10-12 23:59:50,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 745. [2021-10-12 23:59:50,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 740 states have (on average 1.2891891891891891) internal successors, (954), 744 states have internal predecessors, (954), 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) [2021-10-12 23:59:50,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 954 transitions. [2021-10-12 23:59:50,446 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 954 transitions. Word has length 50 [2021-10-12 23:59:50,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:50,446 INFO L470 AbstractCegarLoop]: Abstraction has 745 states and 954 transitions. [2021-10-12 23:59:50,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 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) [2021-10-12 23:59:50,446 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 954 transitions. [2021-10-12 23:59:50,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-12 23:59:50,447 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:50,448 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 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, 1] [2021-10-12 23:59:50,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:50,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:50,669 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-12 23:59:50,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:50,670 INFO L82 PathProgramCache]: Analyzing trace with hash -223969367, now seen corresponding path program 2 times [2021-10-12 23:59:50,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:50,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41479768] [2021-10-12 23:59:50,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:50,670 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:50,678 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-12 23:59:50,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [242166313] [2021-10-12 23:59:50,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-12 23:59:50,678 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:50,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:50,679 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:50,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-10-12 23:59:51,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-12 23:59:51,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-12 23:59:51,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-12 23:59:51,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:51,627 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:51,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:51,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41479768] [2021-10-12 23:59:51,627 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-12 23:59:51,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242166313] [2021-10-12 23:59:51,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242166313] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:51,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-12 23:59:51,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-12 23:59:51,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955493975] [2021-10-12 23:59:51,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-12 23:59:51,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:51,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-12 23:59:51,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-10-12 23:59:51,629 INFO L87 Difference]: Start difference. First operand 745 states and 954 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 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) [2021-10-12 23:59:51,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:51,803 INFO L93 Difference]: Finished difference Result 1348 states and 1753 transitions. [2021-10-12 23:59:51,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-12 23:59:51,804 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 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) Word has length 51 [2021-10-12 23:59:51,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:51,807 INFO L225 Difference]: With dead ends: 1348 [2021-10-12 23:59:51,807 INFO L226 Difference]: Without dead ends: 874 [2021-10-12 23:59:51,808 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 80.7ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-10-12 23:59:51,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2021-10-12 23:59:51,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 834. [2021-10-12 23:59:51,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 829 states have (on average 1.270205066344994) internal successors, (1053), 833 states have internal predecessors, (1053), 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) [2021-10-12 23:59:51,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1053 transitions. [2021-10-12 23:59:51,942 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1053 transitions. Word has length 51 [2021-10-12 23:59:51,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:51,942 INFO L470 AbstractCegarLoop]: Abstraction has 834 states and 1053 transitions. [2021-10-12 23:59:51,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 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) [2021-10-12 23:59:51,943 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1053 transitions. [2021-10-12 23:59:51,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-12 23:59:51,944 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:51,944 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:51,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:52,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-10-12 23:59:52,157 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-12 23:59:52,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:52,158 INFO L82 PathProgramCache]: Analyzing trace with hash 780160965, now seen corresponding path program 3 times [2021-10-12 23:59:52,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:52,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786263400] [2021-10-12 23:59:52,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:52,158 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:52,167 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-12 23:59:52,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1469205728] [2021-10-12 23:59:52,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-12 23:59:52,168 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:52,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:52,169 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:52,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-10-12 23:59:52,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-12 23:59:52,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-12 23:59:52,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-12 23:59:52,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:53,461 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-10-12 23:59:53,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:53,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786263400] [2021-10-12 23:59:53,462 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-12 23:59:53,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469205728] [2021-10-12 23:59:53,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469205728] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:53,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-12 23:59:53,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-12 23:59:53,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927489031] [2021-10-12 23:59:53,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-12 23:59:53,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:53,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-12 23:59:53,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-12 23:59:53,464 INFO L87 Difference]: Start difference. First operand 834 states and 1053 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 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) [2021-10-13 00:00:06,827 WARN L207 SmtUtils]: Spent 13.29 s on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2021-10-13 00:00:09,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:09,155 INFO L93 Difference]: Finished difference Result 868 states and 1095 transitions. [2021-10-13 00:00:09,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 00:00:09,156 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 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) Word has length 52 [2021-10-13 00:00:09,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:09,160 INFO L225 Difference]: With dead ends: 868 [2021-10-13 00:00:09,160 INFO L226 Difference]: Without dead ends: 866 [2021-10-13 00:00:09,161 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 13650.7ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-10-13 00:00:09,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2021-10-13 00:00:09,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 670. [2021-10-13 00:00:09,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 666 states have (on average 1.2597597597597598) internal successors, (839), 669 states have internal predecessors, (839), 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) [2021-10-13 00:00:09,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 839 transitions. [2021-10-13 00:00:09,303 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 839 transitions. Word has length 52 [2021-10-13 00:00:09,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:09,304 INFO L470 AbstractCegarLoop]: Abstraction has 670 states and 839 transitions. [2021-10-13 00:00:09,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 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) [2021-10-13 00:00:09,304 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 839 transitions. [2021-10-13 00:00:09,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-10-13 00:00:09,305 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:09,306 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:09,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:09,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-13 00:00:09,529 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-13 00:00:09,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:09,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1601103788, now seen corresponding path program 2 times [2021-10-13 00:00:09,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:09,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83437712] [2021-10-13 00:00:09,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:09,530 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:09,540 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 00:00:09,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1164397500] [2021-10-13 00:00:09,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:00:09,541 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:00:09,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:09,542 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:00:09,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-10-13 00:00:10,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:00:10,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:00:10,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 00:00:10,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:10,763 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:10,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:10,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83437712] [2021-10-13 00:00:10,764 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 00:00:10,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164397500] [2021-10-13 00:00:10,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164397500] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:10,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-13 00:00:10,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-13 00:00:10,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969920928] [2021-10-13 00:00:10,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 00:00:10,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:10,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 00:00:10,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-10-13 00:00:10,766 INFO L87 Difference]: Start difference. First operand 670 states and 839 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 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) [2021-10-13 00:00:10,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:10,999 INFO L93 Difference]: Finished difference Result 709 states and 877 transitions. [2021-10-13 00:00:11,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-13 00:00:11,000 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 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) Word has length 53 [2021-10-13 00:00:11,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:11,006 INFO L225 Difference]: With dead ends: 709 [2021-10-13 00:00:11,006 INFO L226 Difference]: Without dead ends: 705 [2021-10-13 00:00:11,006 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 90.5ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-10-13 00:00:11,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2021-10-13 00:00:11,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 674. [2021-10-13 00:00:11,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 670 states have (on average 1.2582089552238807) internal successors, (843), 673 states have internal predecessors, (843), 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) [2021-10-13 00:00:11,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 843 transitions. [2021-10-13 00:00:11,095 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 843 transitions. Word has length 53 [2021-10-13 00:00:11,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:11,096 INFO L470 AbstractCegarLoop]: Abstraction has 674 states and 843 transitions. [2021-10-13 00:00:11,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 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) [2021-10-13 00:00:11,096 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 843 transitions. [2021-10-13 00:00:11,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-10-13 00:00:11,097 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:11,098 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:11,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:11,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-10-13 00:00:11,313 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-13 00:00:11,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:11,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1015954848, now seen corresponding path program 3 times [2021-10-13 00:00:11,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:11,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074960062] [2021-10-13 00:00:11,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:11,315 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:11,327 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 00:00:11,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1148969909] [2021-10-13 00:00:11,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 00:00:11,328 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:00:11,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:11,329 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:00:11,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-13 00:00:12,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 00:00:12,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:00:12,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 51 conjunts are in the unsatisfiable core [2021-10-13 00:00:12,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:13,335 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-10-13 00:00:13,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:13,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074960062] [2021-10-13 00:00:13,336 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 00:00:13,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148969909] [2021-10-13 00:00:13,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148969909] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:13,336 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-13 00:00:13,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-13 00:00:13,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847109626] [2021-10-13 00:00:13,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 00:00:13,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:13,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 00:00:13,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-10-13 00:00:13,339 INFO L87 Difference]: Start difference. First operand 674 states and 843 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 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) [2021-10-13 00:00:13,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:13,924 INFO L93 Difference]: Finished difference Result 986 states and 1240 transitions. [2021-10-13 00:00:13,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 00:00:13,925 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 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) Word has length 53 [2021-10-13 00:00:13,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:13,928 INFO L225 Difference]: With dead ends: 986 [2021-10-13 00:00:13,928 INFO L226 Difference]: Without dead ends: 978 [2021-10-13 00:00:13,929 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 228.0ms TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-10-13 00:00:13,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2021-10-13 00:00:14,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 718. [2021-10-13 00:00:14,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 714 states have (on average 1.2549019607843137) internal successors, (896), 717 states have internal predecessors, (896), 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) [2021-10-13 00:00:14,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 896 transitions. [2021-10-13 00:00:14,062 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 896 transitions. Word has length 53 [2021-10-13 00:00:14,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:14,063 INFO L470 AbstractCegarLoop]: Abstraction has 718 states and 896 transitions. [2021-10-13 00:00:14,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 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) [2021-10-13 00:00:14,063 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 896 transitions. [2021-10-13 00:00:14,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-13 00:00:14,064 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:14,064 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 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] [2021-10-13 00:00:14,088 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-10-13 00:00:14,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-13 00:00:14,269 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-13 00:00:14,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:14,270 INFO L82 PathProgramCache]: Analyzing trace with hash -474089570, now seen corresponding path program 1 times [2021-10-13 00:00:14,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:14,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939966258] [2021-10-13 00:00:14,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:14,270 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:14,281 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 00:00:14,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [513501386] [2021-10-13 00:00:14,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:14,282 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:00:14,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:14,298 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:00:14,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-10-13 00:00:15,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:15,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 00:00:15,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:15,472 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 8 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:15,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:15,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939966258] [2021-10-13 00:00:15,472 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 00:00:15,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513501386] [2021-10-13 00:00:15,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513501386] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:15,473 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-13 00:00:15,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-13 00:00:15,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249687000] [2021-10-13 00:00:15,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 00:00:15,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:15,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 00:00:15,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-10-13 00:00:15,474 INFO L87 Difference]: Start difference. First operand 718 states and 896 transitions. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 states have internal predecessors, (55), 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) [2021-10-13 00:00:15,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:15,682 INFO L93 Difference]: Finished difference Result 1112 states and 1429 transitions. [2021-10-13 00:00:15,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-13 00:00:15,683 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 states have internal predecessors, (55), 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) Word has length 55 [2021-10-13 00:00:15,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:15,687 INFO L225 Difference]: With dead ends: 1112 [2021-10-13 00:00:15,687 INFO L226 Difference]: Without dead ends: 756 [2021-10-13 00:00:15,688 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 81.1ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-10-13 00:00:15,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-10-13 00:00:15,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 746. [2021-10-13 00:00:15,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 742 states have (on average 1.2452830188679245) internal successors, (924), 745 states have internal predecessors, (924), 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) [2021-10-13 00:00:15,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 924 transitions. [2021-10-13 00:00:15,829 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 924 transitions. Word has length 55 [2021-10-13 00:00:15,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:15,830 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 924 transitions. [2021-10-13 00:00:15,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 states have internal predecessors, (55), 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) [2021-10-13 00:00:15,830 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 924 transitions. [2021-10-13 00:00:15,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-10-13 00:00:15,831 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:15,831 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:15,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:16,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:00:16,057 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-13 00:00:16,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:16,058 INFO L82 PathProgramCache]: Analyzing trace with hash 766336805, now seen corresponding path program 4 times [2021-10-13 00:00:16,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:16,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758231291] [2021-10-13 00:00:16,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:16,058 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:16,068 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 00:00:16,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [916979690] [2021-10-13 00:00:16,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 00:00:16,069 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:00:16,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:16,070 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:00:16,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-10-13 00:00:16,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 00:00:16,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:00:16,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 70 conjunts are in the unsatisfiable core [2021-10-13 00:00:16,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:20,672 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:20,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:20,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758231291] [2021-10-13 00:00:20,672 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 00:00:20,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916979690] [2021-10-13 00:00:20,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916979690] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:20,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-13 00:00:20,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-10-13 00:00:20,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069844366] [2021-10-13 00:00:20,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 00:00:20,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:20,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 00:00:20,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-10-13 00:00:20,675 INFO L87 Difference]: Start difference. First operand 746 states and 924 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 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) [2021-10-13 00:00:24,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:24,287 INFO L93 Difference]: Finished difference Result 1148 states and 1444 transitions. [2021-10-13 00:00:24,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-13 00:00:24,287 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 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) Word has length 57 [2021-10-13 00:00:24,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:24,291 INFO L225 Difference]: With dead ends: 1148 [2021-10-13 00:00:24,292 INFO L226 Difference]: Without dead ends: 912 [2021-10-13 00:00:24,292 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 3891.8ms TimeCoverageRelationStatistics Valid=282, Invalid=1124, Unknown=0, NotChecked=0, Total=1406 [2021-10-13 00:00:24,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2021-10-13 00:00:24,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 724. [2021-10-13 00:00:24,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 720 states have (on average 1.2472222222222222) internal successors, (898), 723 states have internal predecessors, (898), 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) [2021-10-13 00:00:24,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 898 transitions. [2021-10-13 00:00:24,391 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 898 transitions. Word has length 57 [2021-10-13 00:00:24,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:24,391 INFO L470 AbstractCegarLoop]: Abstraction has 724 states and 898 transitions. [2021-10-13 00:00:24,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 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) [2021-10-13 00:00:24,392 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 898 transitions. [2021-10-13 00:00:24,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-10-13 00:00:24,393 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:24,393 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:24,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:24,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-10-13 00:00:24,609 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-13 00:00:24,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:24,610 INFO L82 PathProgramCache]: Analyzing trace with hash -2113709863, now seen corresponding path program 3 times [2021-10-13 00:00:24,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:24,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119548519] [2021-10-13 00:00:24,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:24,610 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:24,634 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 00:00:24,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [707572681] [2021-10-13 00:00:24,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 00:00:24,635 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:00:24,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:24,640 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:00:24,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-10-13 00:00:26,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-13 00:00:26,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:00:26,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 00:00:26,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:26,496 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:26,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:26,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119548519] [2021-10-13 00:00:26,497 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 00:00:26,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707572681] [2021-10-13 00:00:26,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707572681] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:26,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-13 00:00:26,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-13 00:00:26,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112007609] [2021-10-13 00:00:26,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 00:00:26,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:26,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 00:00:26,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-10-13 00:00:26,498 INFO L87 Difference]: Start difference. First operand 724 states and 898 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 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) [2021-10-13 00:00:26,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:26,727 INFO L93 Difference]: Finished difference Result 1187 states and 1512 transitions. [2021-10-13 00:00:26,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-13 00:00:26,736 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 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) Word has length 59 [2021-10-13 00:00:26,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:26,739 INFO L225 Difference]: With dead ends: 1187 [2021-10-13 00:00:26,739 INFO L226 Difference]: Without dead ends: 831 [2021-10-13 00:00:26,740 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 94.4ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-10-13 00:00:26,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2021-10-13 00:00:26,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 770. [2021-10-13 00:00:26,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 766 states have (on average 1.2428198433420365) internal successors, (952), 769 states have internal predecessors, (952), 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) [2021-10-13 00:00:26,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 952 transitions. [2021-10-13 00:00:26,842 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 952 transitions. Word has length 59 [2021-10-13 00:00:26,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:26,842 INFO L470 AbstractCegarLoop]: Abstraction has 770 states and 952 transitions. [2021-10-13 00:00:26,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 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) [2021-10-13 00:00:26,843 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 952 transitions. [2021-10-13 00:00:26,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-10-13 00:00:26,844 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:26,844 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:26,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:27,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:00:27,045 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-13 00:00:27,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:27,046 INFO L82 PathProgramCache]: Analyzing trace with hash 469187479, now seen corresponding path program 3 times [2021-10-13 00:00:27,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:27,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554312902] [2021-10-13 00:00:27,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:27,046 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:27,075 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 00:00:27,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1104019834] [2021-10-13 00:00:27,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 00:00:27,076 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:00:27,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:27,081 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:00:27,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-10-13 00:00:28,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-13 00:00:28,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-13 00:00:28,172 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:00:28,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:00:28,265 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:00:28,266 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 00:00:28,266 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 00:00:28,268 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 00:00:28,268 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 00:00:28,268 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 00:00:28,269 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 00:00:28,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:28,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:00:28,499 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 00:00:28,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 12:00:28 BoogieIcfgContainer [2021-10-13 00:00:28,567 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 00:00:28,567 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 00:00:28,567 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 00:00:28,568 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 00:00:28,568 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 11:59:09" (3/4) ... [2021-10-13 00:00:28,571 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 00:00:28,631 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/witness.graphml [2021-10-13 00:00:28,632 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 00:00:28,633 INFO L168 Benchmark]: Toolchain (without parser) took 79504.09 ms. Allocated memory was 136.3 MB in the beginning and 343.9 MB in the end (delta: 207.6 MB). Free memory was 102.3 MB in the beginning and 115.7 MB in the end (delta: -13.3 MB). Peak memory consumption was 194.6 MB. Max. memory is 16.1 GB. [2021-10-13 00:00:28,633 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 86.0 MB. Free memory was 58.3 MB in the beginning and 58.3 MB in the end (delta: 25.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:00:28,634 INFO L168 Benchmark]: CACSL2BoogieTranslator took 381.48 ms. Allocated memory is still 136.3 MB. Free memory was 102.3 MB in the beginning and 112.4 MB in the end (delta: -10.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 00:00:28,634 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.11 ms. Allocated memory is still 136.3 MB. Free memory was 112.4 MB in the beginning and 110.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:00:28,634 INFO L168 Benchmark]: Boogie Preprocessor took 25.96 ms. Allocated memory is still 136.3 MB. Free memory was 110.9 MB in the beginning and 109.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:00:28,635 INFO L168 Benchmark]: RCFGBuilder took 333.26 ms. Allocated memory is still 136.3 MB. Free memory was 109.1 MB in the beginning and 97.3 MB in the end (delta: 11.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-13 00:00:28,635 INFO L168 Benchmark]: TraceAbstraction took 78639.89 ms. Allocated memory was 136.3 MB in the beginning and 343.9 MB in the end (delta: 207.6 MB). Free memory was 96.8 MB in the beginning and 120.9 MB in the end (delta: -24.1 MB). Peak memory consumption was 187.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:00:28,636 INFO L168 Benchmark]: Witness Printer took 64.63 ms. Allocated memory is still 343.9 MB. Free memory was 120.9 MB in the beginning and 115.7 MB in the end (delta: 5.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 00:00:28,638 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 86.0 MB. Free memory was 58.3 MB in the beginning and 58.3 MB in the end (delta: 25.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 381.48 ms. Allocated memory is still 136.3 MB. Free memory was 102.3 MB in the beginning and 112.4 MB in the end (delta: -10.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 50.11 ms. Allocated memory is still 136.3 MB. Free memory was 112.4 MB in the beginning and 110.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.96 ms. Allocated memory is still 136.3 MB. Free memory was 110.9 MB in the beginning and 109.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 333.26 ms. Allocated memory is still 136.3 MB. Free memory was 109.1 MB in the beginning and 97.3 MB in the end (delta: 11.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 78639.89 ms. Allocated memory was 136.3 MB in the beginning and 343.9 MB in the end (delta: 207.6 MB). Free memory was 96.8 MB in the beginning and 120.9 MB in the end (delta: -24.1 MB). Peak memory consumption was 187.1 MB. Max. memory is 16.1 GB. * Witness Printer took 64.63 ms. Allocated memory is still 343.9 MB. Free memory was 120.9 MB in the beginning and 115.7 MB in the end (delta: 5.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [counter=0] [L20] int x, y; [L21] long long a, b, p, q, r, s; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L8] COND FALSE !(!cond) VAL [counter=0] [L8] COND FALSE !(!cond) VAL [counter=0] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [counter=0] [L34] EXPR counter++ VAL [counter=1] [L34] COND TRUE counter++<10 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [counter=1] [L41] EXPR counter++ VAL [counter=2] [L41] COND TRUE counter++<10 [L42] COND TRUE !(c >= b) VAL [counter=2] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [counter=2] [L34] EXPR counter++ VAL [counter=3] [L34] COND TRUE counter++<10 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [counter=3] [L41] EXPR counter++ VAL [counter=4] [L41] COND TRUE counter++<10 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [counter=4] [L48] EXPR counter++ VAL [counter=5] [L48] COND TRUE counter++<10 [L11] COND FALSE !(!(cond)) VAL [counter=5] [L11] COND FALSE !(!(cond)) VAL [counter=5] [L11] COND FALSE !(!(cond)) VAL [counter=5] [L11] COND FALSE !(!(cond)) VAL [counter=5] [L54] COND TRUE !(c >= 2 * v) VAL [counter=5] [L59] c = c - v [L60] k = k + d VAL [counter=5] [L41] EXPR counter++ VAL [counter=6] [L41] COND TRUE counter++<10 [L42] COND TRUE !(c >= b) VAL [counter=6] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [counter=6] [L34] EXPR counter++ VAL [counter=7] [L34] COND TRUE counter++<10 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [counter=7] [L41] EXPR counter++ VAL [counter=8] [L41] COND TRUE counter++<10 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [counter=8] [L48] EXPR counter++ VAL [counter=9] [L48] COND TRUE counter++<10 [L11] COND FALSE !(!(cond)) VAL [counter=9] [L11] COND FALSE !(!(cond)) VAL [counter=9] [L11] COND FALSE !(!(cond)) VAL [counter=9] [L11] COND FALSE !(!(cond)) VAL [counter=9] [L54] COND TRUE !(c >= 2 * v) VAL [counter=9] [L59] c = c - v [L60] k = k + d VAL [counter=9] [L41] EXPR counter++ VAL [counter=10] [L41] COND TRUE counter++<10 [L42] COND TRUE !(c >= b) VAL [counter=10] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [counter=10] [L34] EXPR counter++ VAL [counter=11] [L34] COND FALSE !(counter++<10) [L11] COND TRUE !(cond) VAL [counter=11] [L13] reach_error() VAL [counter=11] - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 40 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 78498.2ms, OverallIterations: 44, TraceHistogramMax: 5, EmptinessCheckTime: 56.7ms, AutomataDifference: 30307.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 26.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2016 SDtfs, 6014 SDslu, 8390 SDs, 0 SdLazy, 5692 SolverSat, 1036 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7110.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1743 GetRequests, 1188 SyntacticMatches, 0 SemanticMatches, 555 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2137 ImplicationChecksByTransitivity, 22934.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=834occurred in iteration=37, InterpolantAutomatonStates: 537, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 2290.0ms AutomataMinimizationTime, 43 MinimizatonAttempts, 3983 StatesRemovedByMinimization, 39 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 306.6ms SsaConstructionTime, 1608.3ms SatisfiabilityAnalysisTime, 16714.8ms InterpolantComputationTime, 1565 NumberOfCodeBlocks, 1502 NumberOfCodeBlocksAsserted, 62 NumberOfCheckSat, 1462 ConstructedInterpolants, 0 QuantifiedInterpolants, 11306 SizeOfPredicates, 333 NumberOfNonLiveVariables, 6542 ConjunctsInSsa, 869 ConjunctsInUnsatCore, 43 InterpolantComputations, 12 PerfectInterpolantSequences, 270/795 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 RESULT: Ultimate proved your program to be incorrect! [2021-10-13 00:00:28,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84659628-447b-4457-8edf-39c0f9c0cce7/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...